./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_byte_buf_from_c_str_harness.i --full-output --preprocessor.use.memory.slicer true --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version abd6749d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/aws-c-common/aws_byte_buf_from_c_str_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 926c219674f55200b40d9809e5b1fdaded5b761814321598aab4b2039c1325ea --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 06:53:19,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 06:53:19,111 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 06:53:19,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 06:53:19,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 06:53:19,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 06:53:19,144 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 06:53:19,144 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 06:53:19,144 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 06:53:19,148 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 06:53:19,148 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 06:53:19,148 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 06:53:19,149 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 06:53:19,150 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 06:53:19,150 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 06:53:19,150 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 06:53:19,151 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 06:53:19,151 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 06:53:19,151 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 06:53:19,152 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 06:53:19,152 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 06:53:19,153 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 06:53:19,153 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 06:53:19,153 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 06:53:19,154 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 06:53:19,154 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 06:53:19,154 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 06:53:19,154 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 06:53:19,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 06:53:19,155 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 06:53:19,155 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 06:53:19,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 06:53:19,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 06:53:19,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 06:53:19,156 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 06:53:19,156 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 06:53:19,156 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 06:53:19,157 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 06:53:19,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 06:53:19,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 926c219674f55200b40d9809e5b1fdaded5b761814321598aab4b2039c1325ea Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-23 06:53:19,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 06:53:19,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 06:53:19,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 06:53:19,405 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 06:53:19,405 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 06:53:19,406 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_byte_buf_from_c_str_harness.i [2023-11-23 06:53:20,557 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 06:53:20,879 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 06:53:20,879 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_byte_buf_from_c_str_harness.i [2023-11-23 06:53:20,904 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d5c659e/242065d8e3604e29bd8c5410905f9656/FLAGa9743e42b [2023-11-23 06:53:20,915 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d5c659e/242065d8e3604e29bd8c5410905f9656 [2023-11-23 06:53:20,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 06:53:20,918 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 06:53:20,920 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 06:53:20,920 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 06:53:20,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 06:53:20,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:53:20" (1/1) ... [2023-11-23 06:53:20,924 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b37bcc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:20, skipping insertion in model container [2023-11-23 06:53:20,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:53:20" (1/1) ... [2023-11-23 06:53:20,992 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 06:53:21,209 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_byte_buf_from_c_str_harness.i[4497,4510] [2023-11-23 06:53:21,217 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_byte_buf_from_c_str_harness.i[4557,4570] [2023-11-23 06:53:21,811 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:21,811 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:21,812 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:21,812 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:21,814 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:21,826 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:21,833 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:21,834 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:21,835 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,070 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 06:53:22,071 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 06:53:22,072 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 06:53:22,073 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 06:53:22,074 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 06:53:22,074 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 06:53:22,074 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 06:53:22,075 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 06:53:22,075 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 06:53:22,076 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 06:53:22,276 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,276 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 06:53:22,388 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 06:53:22,407 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_byte_buf_from_c_str_harness.i[4497,4510] [2023-11-23 06:53:22,438 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_byte_buf_from_c_str_harness.i[4557,4570] [2023-11-23 06:53:22,474 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,474 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,475 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,475 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,475 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,478 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,479 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,480 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,480 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,504 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 06:53:22,504 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 06:53:22,505 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 06:53:22,505 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 06:53:22,506 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 06:53:22,506 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 06:53:22,506 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 06:53:22,507 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 06:53:22,507 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 06:53:22,507 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 06:53:22,579 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8269] [2023-11-23 06:53:22,581 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,581 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 06:53:22,591 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8755-8766] [2023-11-23 06:53:22,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 06:53:22,786 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,786 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,787 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,787 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,787 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,787 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,787 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,788 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,788 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,788 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,788 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,788 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,788 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,789 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,789 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,789 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,789 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,789 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 06:53:22,795 INFO L206 MainTranslator]: Completed translation [2023-11-23 06:53:22,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22 WrapperNode [2023-11-23 06:53:22,796 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 06:53:22,797 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 06:53:22,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 06:53:22,797 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 06:53:22,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:22,893 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:22,952 INFO L138 Inliner]: procedures = 689, calls = 2625, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 823 [2023-11-23 06:53:22,952 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 06:53:22,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 06:53:22,953 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 06:53:22,953 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 06:53:22,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:22,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:22,970 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:23,032 INFO L188 MemorySlicer]: Split 536 memory accesses to 6 slices as follows [2, 5, 239, 256, 31, 3]. 48 percent of accesses are in the largest equivalence class. The 506 initializations are split as follows [2, 5, 236, 256, 4, 3]. The 4 writes are split as follows [0, 0, 0, 0, 4, 0]. [2023-11-23 06:53:23,033 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:23,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:23,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:23,083 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:23,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:23,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:23,103 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 06:53:23,108 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 06:53:23,111 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 06:53:23,111 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 06:53:23,112 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (1/1) ... [2023-11-23 06:53:23,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 06:53:23,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 06:53:23,165 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 06:53:23,229 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 06:53:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-11-23 06:53:23,266 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-11-23 06:53:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 06:53:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 06:53:23,266 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 06:53:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 06:53:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 06:53:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 06:53:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 06:53:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 06:53:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 06:53:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 06:53:23,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 06:53:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 06:53:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 06:53:23,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 06:53:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 06:53:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 06:53:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 06:53:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 06:53:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-23 06:53:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 06:53:23,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 06:53:23,269 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 06:53:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 06:53:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 06:53:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 06:53:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 06:53:23,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 06:53:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 06:53:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 06:53:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 06:53:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 06:53:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-23 06:53:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-23 06:53:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-23 06:53:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-23 06:53:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-23 06:53:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-23 06:53:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-23 06:53:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 06:53:23,272 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 06:53:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 06:53:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 06:53:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 06:53:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 06:53:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 06:53:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 06:53:23,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 06:53:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 06:53:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 06:53:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 06:53:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 06:53:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 06:53:23,503 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 06:53:23,504 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 06:53:24,149 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 06:53:24,236 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 06:53:24,236 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 06:53:24,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:53:24 BoogieIcfgContainer [2023-11-23 06:53:24,237 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 06:53:24,238 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 06:53:24,238 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 06:53:24,241 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 06:53:24,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:53:20" (1/3) ... [2023-11-23 06:53:24,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed46b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:53:24, skipping insertion in model container [2023-11-23 06:53:24,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:53:22" (2/3) ... [2023-11-23 06:53:24,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed46b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:53:24, skipping insertion in model container [2023-11-23 06:53:24,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:53:24" (3/3) ... [2023-11-23 06:53:24,245 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_from_c_str_harness.i [2023-11-23 06:53:24,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 06:53:24,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 06:53:24,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 06:53:24,307 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;@233f331e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 06:53:24,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 06:53:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-23 06:53:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 06:53:24,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:24,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 06:53:24,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:24,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:24,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1151303967, now seen corresponding path program 1 times [2023-11-23 06:53:24,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:24,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551920910] [2023-11-23 06:53:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:24,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:25,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:25,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 06:53:25,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:25,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551920910] [2023-11-23 06:53:25,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551920910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:25,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:25,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 06:53:25,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407638467] [2023-11-23 06:53:25,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:25,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 06:53:25,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 06:53:25,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 06:53:25,224 INFO L87 Difference]: Start difference. First operand has 77 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 06:53:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:25,346 INFO L93 Difference]: Finished difference Result 148 states and 213 transitions. [2023-11-23 06:53:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 06:53:25,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-23 06:53:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:25,355 INFO L225 Difference]: With dead ends: 148 [2023-11-23 06:53:25,355 INFO L226 Difference]: Without dead ends: 74 [2023-11-23 06:53:25,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 06:53:25,360 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 18 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:25,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 333 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-23 06:53:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-23 06:53:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 49 states have internal predecessors, (57), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-23 06:53:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2023-11-23 06:53:25,391 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 15 [2023-11-23 06:53:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:25,391 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2023-11-23 06:53:25,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 06:53:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2023-11-23 06:53:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 06:53:25,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:25,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 06:53:25,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 06:53:25,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:25,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:25,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1575688462, now seen corresponding path program 1 times [2023-11-23 06:53:25,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:25,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489000760] [2023-11-23 06:53:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:25,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:25,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:25,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 06:53:25,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:25,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489000760] [2023-11-23 06:53:25,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489000760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:25,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:25,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 06:53:25,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23346619] [2023-11-23 06:53:25,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:25,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 06:53:25,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:25,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 06:53:25,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 06:53:25,656 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 06:53:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:25,736 INFO L93 Difference]: Finished difference Result 152 states and 201 transitions. [2023-11-23 06:53:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 06:53:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-23 06:53:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:25,737 INFO L225 Difference]: With dead ends: 152 [2023-11-23 06:53:25,737 INFO L226 Difference]: Without dead ends: 96 [2023-11-23 06:53:25,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 06:53:25,739 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 42 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:25,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 262 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-23 06:53:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2023-11-23 06:53:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 51 states have internal predecessors, (59), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-23 06:53:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2023-11-23 06:53:25,746 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 21 [2023-11-23 06:53:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:25,746 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2023-11-23 06:53:25,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 06:53:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2023-11-23 06:53:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 06:53:25,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:25,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 06:53:25,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 06:53:25,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:25,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1968715472, now seen corresponding path program 1 times [2023-11-23 06:53:25,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:25,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904505887] [2023-11-23 06:53:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:25,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:25,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 06:53:25,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:25,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904505887] [2023-11-23 06:53:25,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904505887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:25,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:25,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 06:53:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940257192] [2023-11-23 06:53:25,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:25,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 06:53:25,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 06:53:25,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 06:53:25,954 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 06:53:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:26,013 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2023-11-23 06:53:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 06:53:26,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-23 06:53:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:26,014 INFO L225 Difference]: With dead ends: 144 [2023-11-23 06:53:26,015 INFO L226 Difference]: Without dead ends: 86 [2023-11-23 06:53:26,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 06:53:26,016 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 29 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:26,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 243 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 06:53:26,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-23 06:53:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2023-11-23 06:53:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.22) internal successors, (61), 53 states have internal predecessors, (61), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-23 06:53:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2023-11-23 06:53:26,022 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 21 [2023-11-23 06:53:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:26,022 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2023-11-23 06:53:26,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 06:53:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2023-11-23 06:53:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 06:53:26,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:26,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 06:53:26,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 06:53:26,023 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:26,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:26,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1833853900, now seen corresponding path program 1 times [2023-11-23 06:53:26,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:26,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117884774] [2023-11-23 06:53:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:26,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:26,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:26,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 06:53:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:26,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117884774] [2023-11-23 06:53:26,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117884774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:26,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:26,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 06:53:26,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724992376] [2023-11-23 06:53:26,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:26,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 06:53:26,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:26,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 06:53:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 06:53:26,534 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 06:53:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:26,646 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2023-11-23 06:53:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 06:53:26,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-23 06:53:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:26,650 INFO L225 Difference]: With dead ends: 89 [2023-11-23 06:53:26,650 INFO L226 Difference]: Without dead ends: 87 [2023-11-23 06:53:26,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 06:53:26,651 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 23 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:26,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 554 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-23 06:53:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2023-11-23 06:53:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.2) internal successors, (66), 59 states have internal predecessors, (66), 21 states have call successors, (21), 7 states have call predecessors, (21), 9 states have return successors, (22), 19 states have call predecessors, (22), 19 states have call successors, (22) [2023-11-23 06:53:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2023-11-23 06:53:26,658 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 21 [2023-11-23 06:53:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:26,658 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2023-11-23 06:53:26,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 06:53:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2023-11-23 06:53:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 06:53:26,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:26,659 INFO L195 NwaCegarLoop]: trace histogram [1, 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 06:53:26,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 06:53:26,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:26,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:26,660 INFO L85 PathProgramCache]: Analyzing trace with hash -23957528, now seen corresponding path program 1 times [2023-11-23 06:53:26,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:26,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185198684] [2023-11-23 06:53:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:26,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:27,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:27,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 06:53:27,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:27,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185198684] [2023-11-23 06:53:27,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185198684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:27,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:27,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 06:53:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868892666] [2023-11-23 06:53:27,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:27,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 06:53:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 06:53:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 06:53:27,709 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 06:53:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:27,920 INFO L93 Difference]: Finished difference Result 165 states and 212 transitions. [2023-11-23 06:53:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 06:53:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 06:53:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:27,921 INFO L225 Difference]: With dead ends: 165 [2023-11-23 06:53:27,921 INFO L226 Difference]: Without dead ends: 102 [2023-11-23 06:53:27,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-23 06:53:27,922 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 34 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:27,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 477 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 06:53:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-23 06:53:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2023-11-23 06:53:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 67 states have internal predecessors, (73), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (26), 19 states have call predecessors, (26), 20 states have call successors, (26) [2023-11-23 06:53:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 121 transitions. [2023-11-23 06:53:27,933 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 121 transitions. Word has length 25 [2023-11-23 06:53:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:27,933 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 121 transitions. [2023-11-23 06:53:27,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 06:53:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 121 transitions. [2023-11-23 06:53:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 06:53:27,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:27,934 INFO L195 NwaCegarLoop]: trace histogram [1, 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 06:53:27,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 06:53:27,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:27,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:27,935 INFO L85 PathProgramCache]: Analyzing trace with hash 677107050, now seen corresponding path program 1 times [2023-11-23 06:53:27,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:27,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128570192] [2023-11-23 06:53:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:27,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:28,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:28,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 06:53:28,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:28,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128570192] [2023-11-23 06:53:28,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128570192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:28,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:28,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 06:53:28,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145330127] [2023-11-23 06:53:28,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:28,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 06:53:28,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 06:53:28,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 06:53:28,347 INFO L87 Difference]: Start difference. First operand 94 states and 121 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 06:53:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:28,429 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2023-11-23 06:53:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 06:53:28,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-23 06:53:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:28,431 INFO L225 Difference]: With dead ends: 178 [2023-11-23 06:53:28,431 INFO L226 Difference]: Without dead ends: 109 [2023-11-23 06:53:28,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 06:53:28,432 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 22 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:28,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 237 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-23 06:53:28,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2023-11-23 06:53:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.1875) internal successors, (76), 70 states have internal predecessors, (76), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (26), 19 states have call predecessors, (26), 20 states have call successors, (26) [2023-11-23 06:53:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2023-11-23 06:53:28,440 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 25 [2023-11-23 06:53:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:28,440 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2023-11-23 06:53:28,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 06:53:28,441 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2023-11-23 06:53:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 06:53:28,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:28,442 INFO L195 NwaCegarLoop]: trace histogram [1, 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 06:53:28,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 06:53:28,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:28,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1585674642, now seen corresponding path program 1 times [2023-11-23 06:53:28,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:28,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596856589] [2023-11-23 06:53:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:28,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:29,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:29,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 06:53:29,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:29,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596856589] [2023-11-23 06:53:29,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596856589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:29,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:29,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 06:53:29,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940099191] [2023-11-23 06:53:29,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:29,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 06:53:29,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:29,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 06:53:29,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 06:53:29,598 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 06:53:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:29,902 INFO L93 Difference]: Finished difference Result 187 states and 240 transitions. [2023-11-23 06:53:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 06:53:29,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 06:53:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:29,904 INFO L225 Difference]: With dead ends: 187 [2023-11-23 06:53:29,904 INFO L226 Difference]: Without dead ends: 115 [2023-11-23 06:53:29,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-23 06:53:29,905 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 50 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:29,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 495 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 06:53:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-23 06:53:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2023-11-23 06:53:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 75 states have internal predecessors, (84), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (26), 19 states have call predecessors, (26), 20 states have call successors, (26) [2023-11-23 06:53:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2023-11-23 06:53:29,916 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 25 [2023-11-23 06:53:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:29,917 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2023-11-23 06:53:29,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 06:53:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2023-11-23 06:53:29,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 06:53:29,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:29,919 INFO L195 NwaCegarLoop]: trace histogram [1, 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 06:53:29,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 06:53:29,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:29,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1698175404, now seen corresponding path program 1 times [2023-11-23 06:53:29,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:29,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057221008] [2023-11-23 06:53:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:29,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:30,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:30,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 06:53:30,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:30,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057221008] [2023-11-23 06:53:30,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057221008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:30,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:30,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 06:53:30,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279971793] [2023-11-23 06:53:30,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:30,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 06:53:30,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:30,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 06:53:30,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 06:53:30,838 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 06:53:31,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:31,090 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2023-11-23 06:53:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 06:53:31,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 06:53:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:31,091 INFO L225 Difference]: With dead ends: 197 [2023-11-23 06:53:31,092 INFO L226 Difference]: Without dead ends: 120 [2023-11-23 06:53:31,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-23 06:53:31,093 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 48 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:31,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 604 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 06:53:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-23 06:53:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2023-11-23 06:53:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (26), 19 states have call predecessors, (26), 20 states have call successors, (26) [2023-11-23 06:53:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2023-11-23 06:53:31,100 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 25 [2023-11-23 06:53:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:31,100 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2023-11-23 06:53:31,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 06:53:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2023-11-23 06:53:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 06:53:31,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:31,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 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 06:53:31,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 06:53:31,102 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:31,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:31,102 INFO L85 PathProgramCache]: Analyzing trace with hash 616269251, now seen corresponding path program 1 times [2023-11-23 06:53:31,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:31,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077760443] [2023-11-23 06:53:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:31,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:31,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:31,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 06:53:31,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:31,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077760443] [2023-11-23 06:53:31,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077760443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:31,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:31,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 06:53:31,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570032721] [2023-11-23 06:53:31,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:31,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 06:53:31,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:31,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 06:53:31,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 06:53:31,812 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 06:53:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:31,986 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2023-11-23 06:53:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 06:53:31,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-11-23 06:53:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:31,988 INFO L225 Difference]: With dead ends: 117 [2023-11-23 06:53:31,989 INFO L226 Difference]: Without dead ends: 115 [2023-11-23 06:53:31,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-23 06:53:31,990 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 31 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:31,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 705 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-23 06:53:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2023-11-23 06:53:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 79 states have internal predecessors, (85), 22 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2023-11-23 06:53:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 135 transitions. [2023-11-23 06:53:32,000 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 135 transitions. Word has length 27 [2023-11-23 06:53:32,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:32,002 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 135 transitions. [2023-11-23 06:53:32,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 06:53:32,002 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 135 transitions. [2023-11-23 06:53:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 06:53:32,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:32,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 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 06:53:32,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 06:53:32,003 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:32,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:32,004 INFO L85 PathProgramCache]: Analyzing trace with hash 223242241, now seen corresponding path program 1 times [2023-11-23 06:53:32,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:32,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807102982] [2023-11-23 06:53:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:32,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:32,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:32,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 06:53:32,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:32,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807102982] [2023-11-23 06:53:32,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807102982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:32,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:32,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 06:53:32,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299896701] [2023-11-23 06:53:32,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:32,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 06:53:32,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:32,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 06:53:32,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 06:53:32,883 INFO L87 Difference]: Start difference. First operand 106 states and 135 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 06:53:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:33,070 INFO L93 Difference]: Finished difference Result 195 states and 244 transitions. [2023-11-23 06:53:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 06:53:33,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-11-23 06:53:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:33,071 INFO L225 Difference]: With dead ends: 195 [2023-11-23 06:53:33,071 INFO L226 Difference]: Without dead ends: 114 [2023-11-23 06:53:33,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-23 06:53:33,072 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 33 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:33,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 418 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 06:53:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-23 06:53:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2023-11-23 06:53:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 74 states have internal predecessors, (81), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (25), 19 states have call predecessors, (25), 20 states have call successors, (25) [2023-11-23 06:53:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2023-11-23 06:53:33,077 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 27 [2023-11-23 06:53:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:33,078 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2023-11-23 06:53:33,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 06:53:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2023-11-23 06:53:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 06:53:33,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:33,079 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 06:53:33,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 06:53:33,079 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:33,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:33,079 INFO L85 PathProgramCache]: Analyzing trace with hash 642004233, now seen corresponding path program 1 times [2023-11-23 06:53:33,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:33,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742467802] [2023-11-23 06:53:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:33,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:33,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:33,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:33,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:33,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 06:53:33,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742467802] [2023-11-23 06:53:33,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742467802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:33,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:33,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 06:53:33,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147519783] [2023-11-23 06:53:33,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:33,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 06:53:33,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:33,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 06:53:33,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 06:53:33,303 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 06:53:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:33,361 INFO L93 Difference]: Finished difference Result 136 states and 171 transitions. [2023-11-23 06:53:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 06:53:33,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-23 06:53:33,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:33,362 INFO L225 Difference]: With dead ends: 136 [2023-11-23 06:53:33,362 INFO L226 Difference]: Without dead ends: 99 [2023-11-23 06:53:33,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 06:53:33,363 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 32 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:33,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 268 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-23 06:53:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-23 06:53:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 72 states have internal predecessors, (79), 22 states have call successors, (22), 7 states have call predecessors, (22), 9 states have return successors, (24), 19 states have call predecessors, (24), 20 states have call successors, (24) [2023-11-23 06:53:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2023-11-23 06:53:33,367 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 32 [2023-11-23 06:53:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:33,367 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2023-11-23 06:53:33,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 06:53:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2023-11-23 06:53:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 06:53:33,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:33,368 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 06:53:33,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 06:53:33,368 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:33,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash -625485666, now seen corresponding path program 1 times [2023-11-23 06:53:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:33,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161760555] [2023-11-23 06:53:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:33,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:33,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:33,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:33,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:33,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 06:53:33,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:33,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161760555] [2023-11-23 06:53:33,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161760555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:33,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:33,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 06:53:33,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944285703] [2023-11-23 06:53:33,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:33,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 06:53:33,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 06:53:33,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 06:53:33,765 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 06:53:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:33,852 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2023-11-23 06:53:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 06:53:33,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2023-11-23 06:53:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:33,854 INFO L225 Difference]: With dead ends: 110 [2023-11-23 06:53:33,854 INFO L226 Difference]: Without dead ends: 108 [2023-11-23 06:53:33,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 06:53:33,855 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 23 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:33,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 556 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-23 06:53:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2023-11-23 06:53:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 78 states have internal predecessors, (84), 23 states have call successors, (23), 8 states have call predecessors, (23), 11 states have return successors, (28), 20 states have call predecessors, (28), 21 states have call successors, (28) [2023-11-23 06:53:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2023-11-23 06:53:33,859 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 38 [2023-11-23 06:53:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:33,859 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2023-11-23 06:53:33,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 06:53:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2023-11-23 06:53:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 06:53:33,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:33,860 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 06:53:33,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 06:53:33,860 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:33,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash 915679058, now seen corresponding path program 1 times [2023-11-23 06:53:33,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:33,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880361704] [2023-11-23 06:53:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:33,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:34,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:34,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:34,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:34,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 06:53:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880361704] [2023-11-23 06:53:34,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880361704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:34,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:34,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 06:53:34,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236079519] [2023-11-23 06:53:34,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:34,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 06:53:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 06:53:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 06:53:34,820 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 06:53:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:35,100 INFO L93 Difference]: Finished difference Result 184 states and 241 transitions. [2023-11-23 06:53:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 06:53:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2023-11-23 06:53:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:35,102 INFO L225 Difference]: With dead ends: 184 [2023-11-23 06:53:35,102 INFO L226 Difference]: Without dead ends: 149 [2023-11-23 06:53:35,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-23 06:53:35,103 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 47 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:35,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 414 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 06:53:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-23 06:53:35,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2023-11-23 06:53:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 85 states have internal predecessors, (91), 25 states have call successors, (25), 8 states have call predecessors, (25), 12 states have return successors, (35), 22 states have call predecessors, (35), 23 states have call successors, (35) [2023-11-23 06:53:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2023-11-23 06:53:35,108 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 42 [2023-11-23 06:53:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:35,109 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2023-11-23 06:53:35,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 06:53:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2023-11-23 06:53:35,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 06:53:35,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:35,110 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 06:53:35,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 06:53:35,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:35,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash -646038056, now seen corresponding path program 1 times [2023-11-23 06:53:35,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:35,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633614880] [2023-11-23 06:53:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:35,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:36,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:36,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:36,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:36,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 06:53:36,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:36,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633614880] [2023-11-23 06:53:36,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633614880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:36,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:36,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 06:53:36,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659783203] [2023-11-23 06:53:36,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:36,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 06:53:36,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 06:53:36,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 06:53:36,281 INFO L87 Difference]: Start difference. First operand 116 states and 151 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 06:53:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:36,714 INFO L93 Difference]: Finished difference Result 195 states and 259 transitions. [2023-11-23 06:53:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 06:53:36,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2023-11-23 06:53:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:36,715 INFO L225 Difference]: With dead ends: 195 [2023-11-23 06:53:36,715 INFO L226 Difference]: Without dead ends: 160 [2023-11-23 06:53:36,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-23 06:53:36,716 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 64 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:36,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 429 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 06:53:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-23 06:53:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 126. [2023-11-23 06:53:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 95 states have internal predecessors, (103), 25 states have call successors, (25), 8 states have call predecessors, (25), 13 states have return successors, (37), 22 states have call predecessors, (37), 23 states have call successors, (37) [2023-11-23 06:53:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 165 transitions. [2023-11-23 06:53:36,727 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 165 transitions. Word has length 42 [2023-11-23 06:53:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:36,727 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 165 transitions. [2023-11-23 06:53:36,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 06:53:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 165 transitions. [2023-11-23 06:53:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 06:53:36,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:36,728 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 06:53:36,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 06:53:36,729 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:36,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:36,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1657155306, now seen corresponding path program 1 times [2023-11-23 06:53:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:36,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666551334] [2023-11-23 06:53:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:36,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:37,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:37,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:37,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:37,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 06:53:37,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:37,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666551334] [2023-11-23 06:53:37,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666551334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:37,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:37,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 06:53:37,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634443562] [2023-11-23 06:53:37,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:37,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 06:53:37,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:37,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 06:53:37,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 06:53:37,714 INFO L87 Difference]: Start difference. First operand 126 states and 165 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 06:53:38,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:38,049 INFO L93 Difference]: Finished difference Result 197 states and 259 transitions. [2023-11-23 06:53:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 06:53:38,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2023-11-23 06:53:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:38,050 INFO L225 Difference]: With dead ends: 197 [2023-11-23 06:53:38,050 INFO L226 Difference]: Without dead ends: 162 [2023-11-23 06:53:38,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-23 06:53:38,051 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 62 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:38,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 533 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 06:53:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-23 06:53:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 115. [2023-11-23 06:53:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.155844155844156) internal successors, (89), 84 states have internal predecessors, (89), 25 states have call successors, (25), 8 states have call predecessors, (25), 12 states have return successors, (34), 22 states have call predecessors, (34), 23 states have call successors, (34) [2023-11-23 06:53:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2023-11-23 06:53:38,058 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 42 [2023-11-23 06:53:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:38,059 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2023-11-23 06:53:38,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 06:53:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2023-11-23 06:53:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 06:53:38,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:38,060 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 06:53:38,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 06:53:38,060 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:38,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1802587831, now seen corresponding path program 1 times [2023-11-23 06:53:38,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:38,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872240314] [2023-11-23 06:53:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:38,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:38,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:38,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:38,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:38,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:38,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 06:53:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 06:53:38,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:38,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872240314] [2023-11-23 06:53:38,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872240314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:38,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:38,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 06:53:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165339962] [2023-11-23 06:53:38,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:38,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 06:53:38,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 06:53:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 06:53:38,784 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-23 06:53:38,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:38,956 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2023-11-23 06:53:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 06:53:38,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2023-11-23 06:53:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:38,958 INFO L225 Difference]: With dead ends: 121 [2023-11-23 06:53:38,958 INFO L226 Difference]: Without dead ends: 119 [2023-11-23 06:53:38,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 06:53:38,959 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 19 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:38,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 395 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:38,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-23 06:53:38,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-23 06:53:38,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 80 states have (on average 1.15) internal successors, (92), 87 states have internal predecessors, (92), 25 states have call successors, (25), 9 states have call predecessors, (25), 13 states have return successors, (34), 22 states have call predecessors, (34), 23 states have call successors, (34) [2023-11-23 06:53:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 151 transitions. [2023-11-23 06:53:38,967 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 151 transitions. Word has length 44 [2023-11-23 06:53:38,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:38,967 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 151 transitions. [2023-11-23 06:53:38,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-23 06:53:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 151 transitions. [2023-11-23 06:53:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 06:53:38,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:38,968 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 06:53:38,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 06:53:38,969 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:38,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:38,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1996821843, now seen corresponding path program 1 times [2023-11-23 06:53:38,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:38,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189997301] [2023-11-23 06:53:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:38,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:39,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:39,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:39,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:39,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 06:53:39,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:39,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189997301] [2023-11-23 06:53:39,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189997301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:39,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:39,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 06:53:39,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618608580] [2023-11-23 06:53:39,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:39,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 06:53:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:39,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 06:53:39,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 06:53:39,466 INFO L87 Difference]: Start difference. First operand 119 states and 151 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 06:53:39,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:39,630 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2023-11-23 06:53:39,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 06:53:39,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2023-11-23 06:53:39,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:39,631 INFO L225 Difference]: With dead ends: 127 [2023-11-23 06:53:39,631 INFO L226 Difference]: Without dead ends: 125 [2023-11-23 06:53:39,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-23 06:53:39,632 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 31 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:39,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 709 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-23 06:53:39,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 116. [2023-11-23 06:53:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 84 states have internal predecessors, (90), 25 states have call successors, (25), 9 states have call predecessors, (25), 12 states have return successors, (30), 22 states have call predecessors, (30), 23 states have call successors, (30) [2023-11-23 06:53:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2023-11-23 06:53:39,637 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 44 [2023-11-23 06:53:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:39,637 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2023-11-23 06:53:39,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 06:53:39,638 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2023-11-23 06:53:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 06:53:39,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:39,638 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 06:53:39,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 06:53:39,639 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:39,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:39,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1905118443, now seen corresponding path program 1 times [2023-11-23 06:53:39,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:39,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394742001] [2023-11-23 06:53:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:39,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:40,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:40,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:40,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:40,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 06:53:40,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:40,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394742001] [2023-11-23 06:53:40,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394742001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:40,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:40,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 06:53:40,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496981264] [2023-11-23 06:53:40,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:40,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 06:53:40,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:40,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 06:53:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-23 06:53:40,604 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 06:53:40,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:40,858 INFO L93 Difference]: Finished difference Result 184 states and 232 transitions. [2023-11-23 06:53:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 06:53:40,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2023-11-23 06:53:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:40,859 INFO L225 Difference]: With dead ends: 184 [2023-11-23 06:53:40,859 INFO L226 Difference]: Without dead ends: 145 [2023-11-23 06:53:40,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-23 06:53:40,860 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 45 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:40,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 367 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 06:53:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-23 06:53:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2023-11-23 06:53:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.162162162162162) internal successors, (86), 79 states have internal predecessors, (86), 25 states have call successors, (25), 9 states have call predecessors, (25), 11 states have return successors, (27), 22 states have call predecessors, (27), 23 states have call successors, (27) [2023-11-23 06:53:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2023-11-23 06:53:40,866 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 44 [2023-11-23 06:53:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:40,866 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2023-11-23 06:53:40,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 06:53:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2023-11-23 06:53:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 06:53:40,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:40,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:53:40,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 06:53:40,867 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:40,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash 443881659, now seen corresponding path program 1 times [2023-11-23 06:53:40,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:40,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997401510] [2023-11-23 06:53:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:40,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:42,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:42,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:53:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:42,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:53:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:42,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:53:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:42,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:42,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:53:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:42,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:53:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 06:53:42,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:42,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997401510] [2023-11-23 06:53:42,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997401510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:42,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:42,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 06:53:42,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056296452] [2023-11-23 06:53:42,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:42,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 06:53:42,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:42,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 06:53:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 06:53:42,234 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 06:53:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:42,631 INFO L93 Difference]: Finished difference Result 211 states and 257 transitions. [2023-11-23 06:53:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 06:53:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-11-23 06:53:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:42,632 INFO L225 Difference]: With dead ends: 211 [2023-11-23 06:53:42,632 INFO L226 Difference]: Without dead ends: 128 [2023-11-23 06:53:42,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-23 06:53:42,633 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 72 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:42,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 242 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 06:53:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-23 06:53:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 117. [2023-11-23 06:53:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 85 states have internal predecessors, (92), 25 states have call successors, (25), 9 states have call predecessors, (25), 12 states have return successors, (28), 22 states have call predecessors, (28), 23 states have call successors, (28) [2023-11-23 06:53:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2023-11-23 06:53:42,640 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 50 [2023-11-23 06:53:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:42,641 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2023-11-23 06:53:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 06:53:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2023-11-23 06:53:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 06:53:42,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:42,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:53:42,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-23 06:53:42,642 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:42,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:42,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1117835455, now seen corresponding path program 1 times [2023-11-23 06:53:42,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:42,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887149274] [2023-11-23 06:53:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:42,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:43,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:43,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:53:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:43,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:53:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:43,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:53:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:44,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:44,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:53:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:44,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:53:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 06:53:44,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:44,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887149274] [2023-11-23 06:53:44,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887149274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:44,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:44,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-23 06:53:44,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267144546] [2023-11-23 06:53:44,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:44,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 06:53:44,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 06:53:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-23 06:53:44,321 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 06:53:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:44,947 INFO L93 Difference]: Finished difference Result 234 states and 288 transitions. [2023-11-23 06:53:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 06:53:44,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2023-11-23 06:53:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:44,952 INFO L225 Difference]: With dead ends: 234 [2023-11-23 06:53:44,959 INFO L226 Difference]: Without dead ends: 140 [2023-11-23 06:53:44,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2023-11-23 06:53:44,961 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 111 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:44,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 319 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 06:53:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-23 06:53:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 127. [2023-11-23 06:53:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 95 states have internal predecessors, (104), 25 states have call successors, (25), 9 states have call predecessors, (25), 13 states have return successors, (29), 22 states have call predecessors, (29), 23 states have call successors, (29) [2023-11-23 06:53:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2023-11-23 06:53:44,989 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 50 [2023-11-23 06:53:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:44,989 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2023-11-23 06:53:44,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 06:53:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2023-11-23 06:53:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 06:53:44,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:44,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:53:44,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-23 06:53:44,991 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:44,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:44,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2128952705, now seen corresponding path program 1 times [2023-11-23 06:53:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:44,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225458828] [2023-11-23 06:53:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:46,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:46,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:53:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:46,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:53:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:46,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:53:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:46,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:46,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:53:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:46,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:53:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 06:53:46,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:46,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225458828] [2023-11-23 06:53:46,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225458828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:46,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:46,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 06:53:46,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264576708] [2023-11-23 06:53:46,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:46,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 06:53:46,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 06:53:46,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-23 06:53:46,601 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 06:53:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:47,188 INFO L93 Difference]: Finished difference Result 247 states and 302 transitions. [2023-11-23 06:53:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 06:53:47,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-11-23 06:53:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:47,190 INFO L225 Difference]: With dead ends: 247 [2023-11-23 06:53:47,190 INFO L226 Difference]: Without dead ends: 143 [2023-11-23 06:53:47,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-11-23 06:53:47,191 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:47,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 306 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 06:53:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-23 06:53:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116. [2023-11-23 06:53:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 84 states have internal predecessors, (90), 25 states have call successors, (25), 9 states have call predecessors, (25), 12 states have return successors, (27), 22 states have call predecessors, (27), 23 states have call successors, (27) [2023-11-23 06:53:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2023-11-23 06:53:47,199 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 50 [2023-11-23 06:53:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:47,199 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2023-11-23 06:53:47,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 06:53:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2023-11-23 06:53:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 06:53:47,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:47,212 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2023-11-23 06:53:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-23 06:53:47,213 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:47,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash 954718199, now seen corresponding path program 1 times [2023-11-23 06:53:47,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:47,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449238579] [2023-11-23 06:53:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:47,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:47,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:47,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:47,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:47,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 06:53:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:47,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 06:53:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 06:53:47,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:47,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449238579] [2023-11-23 06:53:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449238579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:47,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:47,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 06:53:47,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362636498] [2023-11-23 06:53:47,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:47,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 06:53:47,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 06:53:47,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 06:53:47,811 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 06:53:47,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:47,939 INFO L93 Difference]: Finished difference Result 151 states and 185 transitions. [2023-11-23 06:53:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 06:53:47,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2023-11-23 06:53:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:47,941 INFO L225 Difference]: With dead ends: 151 [2023-11-23 06:53:47,941 INFO L226 Difference]: Without dead ends: 128 [2023-11-23 06:53:47,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 06:53:47,943 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 7 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:47,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 368 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-23 06:53:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2023-11-23 06:53:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 86 states have internal predecessors, (93), 27 states have call successors, (27), 9 states have call predecessors, (27), 12 states have return successors, (29), 25 states have call predecessors, (29), 25 states have call successors, (29) [2023-11-23 06:53:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2023-11-23 06:53:47,961 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 51 [2023-11-23 06:53:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:47,961 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2023-11-23 06:53:47,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 06:53:47,962 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2023-11-23 06:53:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 06:53:47,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:47,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:53:47,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-23 06:53:47,963 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:47,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:47,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1154865132, now seen corresponding path program 1 times [2023-11-23 06:53:47,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:47,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474088654] [2023-11-23 06:53:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:47,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:49,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:49,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:53:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:49,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:53:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:49,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:53:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:49,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:49,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:53:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:49,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:53:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 06:53:50,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:50,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474088654] [2023-11-23 06:53:50,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474088654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:50,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:50,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 06:53:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137180691] [2023-11-23 06:53:50,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:50,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 06:53:50,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:50,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 06:53:50,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2023-11-23 06:53:50,069 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 06:53:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:50,985 INFO L93 Difference]: Finished difference Result 137 states and 163 transitions. [2023-11-23 06:53:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 06:53:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2023-11-23 06:53:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:50,986 INFO L225 Difference]: With dead ends: 137 [2023-11-23 06:53:50,986 INFO L226 Difference]: Without dead ends: 135 [2023-11-23 06:53:50,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-11-23 06:53:50,987 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 81 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:50,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 572 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 06:53:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-23 06:53:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2023-11-23 06:53:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 89 states have internal predecessors, (96), 26 states have call successors, (26), 10 states have call predecessors, (26), 13 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2023-11-23 06:53:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2023-11-23 06:53:50,994 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 52 [2023-11-23 06:53:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:50,995 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2023-11-23 06:53:50,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 06:53:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2023-11-23 06:53:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 06:53:50,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:50,995 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2023-11-23 06:53:50,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-23 06:53:50,996 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:51,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:51,000 INFO L85 PathProgramCache]: Analyzing trace with hash 59208101, now seen corresponding path program 1 times [2023-11-23 06:53:51,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:51,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068868074] [2023-11-23 06:53:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:51,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:51,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:51,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:51,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:51,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:51,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 06:53:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:51,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 06:53:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 06:53:51,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:51,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068868074] [2023-11-23 06:53:51,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068868074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:51,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:51,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 06:53:51,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074849249] [2023-11-23 06:53:51,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:51,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 06:53:51,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 06:53:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 06:53:51,193 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 06:53:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:51,253 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2023-11-23 06:53:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 06:53:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2023-11-23 06:53:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:51,254 INFO L225 Difference]: With dead ends: 141 [2023-11-23 06:53:51,254 INFO L226 Difference]: Without dead ends: 129 [2023-11-23 06:53:51,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 06:53:51,255 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 3 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:51,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 249 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-23 06:53:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2023-11-23 06:53:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 90 states have internal predecessors, (97), 26 states have call successors, (26), 10 states have call predecessors, (26), 13 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2023-11-23 06:53:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2023-11-23 06:53:51,273 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 52 [2023-11-23 06:53:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:51,273 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2023-11-23 06:53:51,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 06:53:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2023-11-23 06:53:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 06:53:51,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:51,275 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2023-11-23 06:53:51,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-23 06:53:51,276 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:51,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1899618175, now seen corresponding path program 1 times [2023-11-23 06:53:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:51,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681456609] [2023-11-23 06:53:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:51,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 06:53:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 06:53:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 06:53:52,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681456609] [2023-11-23 06:53:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681456609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:52,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:52,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 06:53:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490224351] [2023-11-23 06:53:52,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:52,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 06:53:52,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 06:53:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 06:53:52,102 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 06:53:52,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:52,283 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2023-11-23 06:53:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 06:53:52,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 53 [2023-11-23 06:53:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:52,284 INFO L225 Difference]: With dead ends: 135 [2023-11-23 06:53:52,284 INFO L226 Difference]: Without dead ends: 133 [2023-11-23 06:53:52,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 06:53:52,285 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 7 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:52,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 517 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 06:53:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-23 06:53:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2023-11-23 06:53:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 95 states have internal predecessors, (101), 27 states have call successors, (27), 11 states have call predecessors, (27), 14 states have return successors, (29), 24 states have call predecessors, (29), 25 states have call successors, (29) [2023-11-23 06:53:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 157 transitions. [2023-11-23 06:53:52,293 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 157 transitions. Word has length 53 [2023-11-23 06:53:52,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:52,294 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 157 transitions. [2023-11-23 06:53:52,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 06:53:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 157 transitions. [2023-11-23 06:53:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 06:53:52,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:52,295 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2023-11-23 06:53:52,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-23 06:53:52,296 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:52,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1662279464, now seen corresponding path program 1 times [2023-11-23 06:53:52,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:52,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031574868] [2023-11-23 06:53:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 06:53:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 06:53:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 06:53:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 06:53:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 06:53:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 06:53:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-23 06:53:52,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:52,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031574868] [2023-11-23 06:53:52,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031574868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:53:52,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:53:52,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 06:53:52,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572045732] [2023-11-23 06:53:53,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:53:53,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 06:53:53,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:53,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 06:53:53,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 06:53:53,004 INFO L87 Difference]: Start difference. First operand 131 states and 157 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 06:53:53,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:53,155 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2023-11-23 06:53:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 06:53:53,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2023-11-23 06:53:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:53,156 INFO L225 Difference]: With dead ends: 139 [2023-11-23 06:53:53,156 INFO L226 Difference]: Without dead ends: 110 [2023-11-23 06:53:53,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 06:53:53,157 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:53,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 521 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 06:53:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-23 06:53:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-23 06:53:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 76 states have (on average 1.144736842105263) internal successors, (87), 81 states have internal predecessors, (87), 21 states have call successors, (21), 9 states have call predecessors, (21), 12 states have return successors, (23), 19 states have call predecessors, (23), 19 states have call successors, (23) [2023-11-23 06:53:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2023-11-23 06:53:53,163 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 59 [2023-11-23 06:53:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:53,163 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2023-11-23 06:53:53,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 06:53:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2023-11-23 06:53:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 06:53:53,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:53,163 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 06:53:53,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-23 06:53:53,164 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:53,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:53,167 INFO L85 PathProgramCache]: Analyzing trace with hash -611066145, now seen corresponding path program 1 times [2023-11-23 06:53:53,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:53,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981744856] [2023-11-23 06:53:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:53,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:53:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:53:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:53:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:53:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:53:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:53:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-23 06:53:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 06:53:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 06:53:54,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:53:54,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981744856] [2023-11-23 06:53:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981744856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:53:54,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574589792] [2023-11-23 06:53:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:54,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:53:54,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 06:53:54,378 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 06:53:54,381 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 06:53:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:53:54,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-23 06:53:54,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 06:53:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 06:53:55,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 06:53:56,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574589792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:53:56,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 06:53:56,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 24 [2023-11-23 06:53:56,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505786174] [2023-11-23 06:53:56,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 06:53:56,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 06:53:56,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:53:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 06:53:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2023-11-23 06:53:56,038 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 7 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-23 06:53:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:53:58,628 INFO L93 Difference]: Finished difference Result 301 states and 356 transitions. [2023-11-23 06:53:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-23 06:53:58,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 7 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 67 [2023-11-23 06:53:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:53:58,630 INFO L225 Difference]: With dead ends: 301 [2023-11-23 06:53:58,630 INFO L226 Difference]: Without dead ends: 241 [2023-11-23 06:53:58,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=607, Invalid=2699, Unknown=0, NotChecked=0, Total=3306 [2023-11-23 06:53:58,632 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 327 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 06:53:58,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 279 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 06:53:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-23 06:53:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2023-11-23 06:53:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 147 states have (on average 1.1496598639455782) internal successors, (169), 157 states have internal predecessors, (169), 35 states have call successors, (35), 16 states have call predecessors, (35), 23 states have return successors, (40), 32 states have call predecessors, (40), 31 states have call successors, (40) [2023-11-23 06:53:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 244 transitions. [2023-11-23 06:53:58,643 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 244 transitions. Word has length 67 [2023-11-23 06:53:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:53:58,643 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 244 transitions. [2023-11-23 06:53:58,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 7 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-23 06:53:58,644 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 244 transitions. [2023-11-23 06:53:58,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 06:53:58,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:53:58,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-23 06:53:58,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 06:53:58,856 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,SelfDestructingSolverStorable26 [2023-11-23 06:53:58,856 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:53:58,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:53:58,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2122184037, now seen corresponding path program 1 times [2023-11-23 06:53:58,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:53:58,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109361245] [2023-11-23 06:53:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:53:58,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:53:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:00,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:00,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:54:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:00,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:54:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:00,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:54:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:00,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:00,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:54:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:00,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:54:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:00,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-23 06:54:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:00,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 06:54:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 06:54:00,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:54:00,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109361245] [2023-11-23 06:54:00,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109361245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:54:00,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5531544] [2023-11-23 06:54:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:54:00,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:54:00,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 06:54:00,498 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 06:54:00,510 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 06:54:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:01,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-23 06:54:01,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 06:54:01,839 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 72 treesize of output 57 [2023-11-23 06:54:01,844 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 72 treesize of output 57 [2023-11-23 06:54:01,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 73 [2023-11-23 06:54:01,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 61 treesize of output 54 [2023-11-23 06:54:01,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-23 06:54:01,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 06:54:01,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 06:54:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 06:54:03,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 06:54:03,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5531544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:54:03,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 06:54:03,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 31 [2023-11-23 06:54:03,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820582188] [2023-11-23 06:54:03,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 06:54:03,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 06:54:03,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:54:03,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 06:54:03,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 06:54:03,447 INFO L87 Difference]: Start difference. First operand 206 states and 244 transitions. Second operand has 31 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 9 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-23 06:54:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:54:06,849 INFO L93 Difference]: Finished difference Result 316 states and 367 transitions. [2023-11-23 06:54:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-23 06:54:06,849 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 9 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 67 [2023-11-23 06:54:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:54:06,851 INFO L225 Difference]: With dead ends: 316 [2023-11-23 06:54:06,851 INFO L226 Difference]: Without dead ends: 256 [2023-11-23 06:54:06,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=667, Invalid=3115, Unknown=0, NotChecked=0, Total=3782 [2023-11-23 06:54:06,853 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 312 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 06:54:06,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 471 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 06:54:06,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-23 06:54:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 154. [2023-11-23 06:54:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 112 states have (on average 1.125) internal successors, (126), 119 states have internal predecessors, (126), 23 states have call successors, (23), 13 states have call predecessors, (23), 18 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2023-11-23 06:54:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2023-11-23 06:54:06,865 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 67 [2023-11-23 06:54:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:54:06,866 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2023-11-23 06:54:06,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 9 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-23 06:54:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2023-11-23 06:54:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 06:54:06,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:54:06,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 06:54:06,900 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 06:54:07,085 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,SelfDestructingSolverStorable27 [2023-11-23 06:54:07,085 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:54:07,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:54:07,086 INFO L85 PathProgramCache]: Analyzing trace with hash -713173704, now seen corresponding path program 1 times [2023-11-23 06:54:07,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:54:07,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238617629] [2023-11-23 06:54:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:54:07,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:54:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:08,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:08,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:54:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:08,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:54:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:08,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:54:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:08,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:08,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:54:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:08,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:54:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:08,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-23 06:54:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:08,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 06:54:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 06:54:08,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:54:08,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238617629] [2023-11-23 06:54:08,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238617629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:54:08,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134994596] [2023-11-23 06:54:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:54:08,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:54:08,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 06:54:08,646 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 06:54:08,671 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 06:54:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:09,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 2519 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-23 06:54:09,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 06:54:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 06:54:09,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 06:54:09,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134994596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:54:09,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 06:54:09,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2023-11-23 06:54:09,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960450309] [2023-11-23 06:54:09,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 06:54:09,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 06:54:09,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:54:09,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 06:54:09,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-11-23 06:54:09,828 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand has 21 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 7 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-23 06:54:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:54:11,418 INFO L93 Difference]: Finished difference Result 260 states and 299 transitions. [2023-11-23 06:54:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 06:54:11,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 7 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 69 [2023-11-23 06:54:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:54:11,420 INFO L225 Difference]: With dead ends: 260 [2023-11-23 06:54:11,420 INFO L226 Difference]: Without dead ends: 211 [2023-11-23 06:54:11,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2023-11-23 06:54:11,426 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 257 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 06:54:11,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 249 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 06:54:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-23 06:54:11,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 152. [2023-11-23 06:54:11,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 117 states have internal predecessors, (125), 23 states have call successors, (23), 13 states have call predecessors, (23), 17 states have return successors, (27), 21 states have call predecessors, (27), 21 states have call successors, (27) [2023-11-23 06:54:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 175 transitions. [2023-11-23 06:54:11,444 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 175 transitions. Word has length 69 [2023-11-23 06:54:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:54:11,445 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 175 transitions. [2023-11-23 06:54:11,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 7 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-23 06:54:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 175 transitions. [2023-11-23 06:54:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 06:54:11,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:54:11,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 06:54:11,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 06:54:11,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-23 06:54:11,653 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:54:11,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:54:11,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1331546384, now seen corresponding path program 1 times [2023-11-23 06:54:11,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:54:11,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419820660] [2023-11-23 06:54:11,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:54:11,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:54:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:12,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:54:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:12,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:54:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:12,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:54:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:12,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:12,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:54:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:12,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:54:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:13,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 06:54:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:13,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-23 06:54:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 06:54:13,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:54:13,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419820660] [2023-11-23 06:54:13,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419820660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:54:13,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270342230] [2023-11-23 06:54:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:54:13,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:54:13,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 06:54:13,124 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 06:54:13,125 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 06:54:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:13,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 06:54:13,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 06:54:13,867 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 80 treesize of output 75 [2023-11-23 06:54:13,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 97 [2023-11-23 06:54:13,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 06:54:13,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 152 [2023-11-23 06:54:13,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 06:54:13,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 38 [2023-11-23 06:54:15,987 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_5| Int)) (let ((.cse0 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_5|))) (= (select .cse0 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_5|)) (select .cse0 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_5|)))) is different from true [2023-11-23 06:54:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 06:54:18,242 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 06:54:18,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270342230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:54:18,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 06:54:18,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2023-11-23 06:54:18,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608284704] [2023-11-23 06:54:18,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:54:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 06:54:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:54:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 06:54:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=230, Unknown=2, NotChecked=30, Total=306 [2023-11-23 06:54:18,244 INFO L87 Difference]: Start difference. First operand 152 states and 175 transitions. Second operand has 9 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 06:54:20,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:54:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:54:20,748 INFO L93 Difference]: Finished difference Result 307 states and 351 transitions. [2023-11-23 06:54:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 06:54:20,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2023-11-23 06:54:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:54:20,750 INFO L225 Difference]: With dead ends: 307 [2023-11-23 06:54:20,750 INFO L226 Difference]: Without dead ends: 175 [2023-11-23 06:54:20,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=80, Invalid=342, Unknown=2, NotChecked=38, Total=462 [2023-11-23 06:54:20,751 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 53 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 06:54:20,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 358 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 1 Unknown, 136 Unchecked, 2.4s Time] [2023-11-23 06:54:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-23 06:54:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 159. [2023-11-23 06:54:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 123 states have internal predecessors, (132), 23 states have call successors, (23), 14 states have call predecessors, (23), 16 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-23 06:54:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 178 transitions. [2023-11-23 06:54:20,765 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 178 transitions. Word has length 73 [2023-11-23 06:54:20,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:54:20,766 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 178 transitions. [2023-11-23 06:54:20,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 06:54:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 178 transitions. [2023-11-23 06:54:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 06:54:20,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:54:20,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 06:54:20,786 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 06:54:20,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:54:20,967 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:54:20,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:54:20,967 INFO L85 PathProgramCache]: Analyzing trace with hash -629946510, now seen corresponding path program 1 times [2023-11-23 06:54:20,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:54:20,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611018826] [2023-11-23 06:54:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:54:20,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:54:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:22,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:22,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:54:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:22,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:54:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:22,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:54:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:22,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:22,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:54:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:22,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:54:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:22,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 06:54:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:22,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-23 06:54:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 06:54:22,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:54:22,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611018826] [2023-11-23 06:54:22,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611018826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 06:54:22,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 06:54:22,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 06:54:22,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515352707] [2023-11-23 06:54:22,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 06:54:22,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 06:54:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:54:22,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 06:54:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-23 06:54:22,734 INFO L87 Difference]: Start difference. First operand 159 states and 178 transitions. Second operand has 10 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-23 06:54:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:54:23,250 INFO L93 Difference]: Finished difference Result 216 states and 244 transitions. [2023-11-23 06:54:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 06:54:23,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2023-11-23 06:54:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:54:23,252 INFO L225 Difference]: With dead ends: 216 [2023-11-23 06:54:23,252 INFO L226 Difference]: Without dead ends: 173 [2023-11-23 06:54:23,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-23 06:54:23,253 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 86 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 06:54:23,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 172 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 06:54:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-23 06:54:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2023-11-23 06:54:23,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 121 states have (on average 1.1074380165289257) internal successors, (134), 125 states have internal predecessors, (134), 23 states have call successors, (23), 14 states have call predecessors, (23), 16 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-23 06:54:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2023-11-23 06:54:23,279 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 73 [2023-11-23 06:54:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:54:23,281 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2023-11-23 06:54:23,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-23 06:54:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2023-11-23 06:54:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 06:54:23,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:54:23,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-23 06:54:23,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-23 06:54:23,285 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:54:23,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:54:23,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2103303672, now seen corresponding path program 1 times [2023-11-23 06:54:23,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:54:23,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032416912] [2023-11-23 06:54:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:54:23,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:54:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:24,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:24,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:54:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:24,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:54:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:24,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:54:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:24,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:24,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:54:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:24,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:54:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:24,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 06:54:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:24,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-23 06:54:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 06:54:24,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:54:24,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032416912] [2023-11-23 06:54:24,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032416912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:54:24,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866007738] [2023-11-23 06:54:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:54:24,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:54:24,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 06:54:24,782 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 06:54:24,803 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 06:54:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:25,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-23 06:54:25,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 06:54:25,815 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 48 treesize of output 1 [2023-11-23 06:54:25,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 1 [2023-11-23 06:54:25,838 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 06:54:25,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 9 [2023-11-23 06:54:26,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 06:54:26,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 147 [2023-11-23 06:54:26,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 06:54:26,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 84 treesize of output 204 [2023-11-23 06:54:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 06:54:30,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 06:54:31,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866007738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:54:31,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 06:54:31,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 26] total 36 [2023-11-23 06:54:31,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517232906] [2023-11-23 06:54:31,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 06:54:31,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 06:54:31,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:54:31,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 06:54:31,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 06:54:31,150 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand has 36 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 8 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-23 06:54:34,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:54:36,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:54:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:54:45,293 INFO L93 Difference]: Finished difference Result 244 states and 281 transitions. [2023-11-23 06:54:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-23 06:54:45,298 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 8 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 73 [2023-11-23 06:54:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:54:45,299 INFO L225 Difference]: With dead ends: 244 [2023-11-23 06:54:45,299 INFO L226 Difference]: Without dead ends: 183 [2023-11-23 06:54:45,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=585, Invalid=4245, Unknown=0, NotChecked=0, Total=4830 [2023-11-23 06:54:45,305 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 275 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 3519 mSolverCounterSat, 103 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 3623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3519 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2023-11-23 06:54:45,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 950 Invalid, 3623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3519 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2023-11-23 06:54:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-23 06:54:45,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2023-11-23 06:54:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 113 states have (on average 1.079646017699115) internal successors, (122), 117 states have internal predecessors, (122), 23 states have call successors, (23), 14 states have call predecessors, (23), 16 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-23 06:54:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 168 transitions. [2023-11-23 06:54:45,341 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 168 transitions. Word has length 73 [2023-11-23 06:54:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:54:45,346 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 168 transitions. [2023-11-23 06:54:45,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 8 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-23 06:54:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 168 transitions. [2023-11-23 06:54:45,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 06:54:45,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:54:45,348 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-23 06:54:45,367 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 06:54:45,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:54:45,559 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:54:45,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:54:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1092186422, now seen corresponding path program 1 times [2023-11-23 06:54:45,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:54:45,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079027757] [2023-11-23 06:54:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:54:45,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:54:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:47,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:54:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:47,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:54:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:47,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:54:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:47,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:54:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:47,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:54:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:47,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:54:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:47,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 06:54:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:47,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-23 06:54:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 06:54:47,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:54:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079027757] [2023-11-23 06:54:47,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079027757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:54:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005867279] [2023-11-23 06:54:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:54:47,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:54:47,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 06:54:47,872 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 06:54:47,873 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 06:54:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:54:48,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-23 06:54:48,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 06:54:48,987 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 111 treesize of output 94 [2023-11-23 06:54:48,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 94 treesize of output 69 [2023-11-23 06:54:48,999 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 111 treesize of output 94 [2023-11-23 06:54:49,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 104 [2023-11-23 06:54:49,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-11-23 06:54:49,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-11-23 06:54:49,083 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 06:54:49,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 1 [2023-11-23 06:54:50,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 06:54:50,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 163 treesize of output 271 [2023-11-23 06:54:50,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 06:54:50,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 107 [2023-11-23 06:54:53,797 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9| Int)) (let ((.cse0 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9|)) (.cse3 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|))) (let ((.cse1 (select .cse0 .cse3))) (and (= (select .cse0 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|) .cse1) (exists ((v_prenex_5 Int)) (let ((.cse2 (+ 16 v_prenex_5))) (and (not (= .cse2 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|)) (not (= v_prenex_5 .cse3)) (exists ((v_prenex_4 Int)) (let ((.cse5 (select |c_#memory_int#4| v_prenex_4))) (let ((.cse4 (select .cse5 v_prenex_5))) (and (= .cse4 (select .cse5 .cse2)) (not (= (mod .cse4 18446744073709551616) 0))))))))) (not (= (mod .cse1 18446744073709551616) 0)))))) (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9| Int)) (let ((.cse6 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9|))) (let ((.cse7 (select .cse6 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|)))) (and (= (select .cse6 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|) .cse7) (exists ((v_prenex_4 Int) (v_prenex_5 Int)) (let ((.cse9 (select |c_#memory_int#4| v_prenex_4))) (let ((.cse8 (select .cse9 v_prenex_5))) (and (= .cse8 (select .cse9 (+ 16 v_prenex_5))) (not (= (mod .cse8 18446744073709551616) 0)) (not (= |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9| v_prenex_4)))))) (not (= (mod .cse7 18446744073709551616) 0)))))) (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9| Int)) (let ((.cse10 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9|))) (let ((.cse11 (select .cse10 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|)))) (and (= (select .cse10 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|) .cse11) (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_8| Int)) (let ((.cse13 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_8|))) (let ((.cse12 (select .cse13 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_8|)) (.cse14 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_8|))) (and (= (mod .cse12 18446744073709551616) 0) (= .cse12 (select .cse13 .cse14)) (not (= .cse14 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|)))))) (not (= (mod .cse11 18446744073709551616) 0)))))) (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9| Int)) (let ((.cse15 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9|))) (let ((.cse16 (select .cse15 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|)))) (and (= (select .cse15 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|) .cse16) (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_8| Int)) (let ((.cse18 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_8|))) (let ((.cse17 (select .cse18 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_8|))) (and (= (mod .cse17 18446744073709551616) 0) (= .cse17 (select .cse18 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_8|))) (not (= |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_8|)))))) (not (= (mod .cse16 18446744073709551616) 0)))))) (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9| Int)) (let ((.cse19 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9|))) (let ((.cse20 (select .cse19 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|)))) (and (= (select .cse19 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|) .cse20) (exists ((v_prenex_5 Int)) (let ((.cse21 (+ 16 v_prenex_5))) (and (not (= .cse21 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_9|)) (exists ((v_prenex_4 Int)) (let ((.cse23 (select |c_#memory_int#4| v_prenex_4))) (let ((.cse22 (select .cse23 v_prenex_5))) (and (= .cse22 (select .cse23 .cse21)) (not (= (mod .cse22 18446744073709551616) 0)) (not (= |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_9| v_prenex_4))))))))) (not (= (mod .cse20 18446744073709551616) 0))))))) is different from true [2023-11-23 06:55:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 06:55:01,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 06:55:01,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005867279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:55:01,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 06:55:01,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 38 [2023-11-23 06:55:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93896067] [2023-11-23 06:55:01,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 06:55:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-23 06:55:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:55:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-23 06:55:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1592, Unknown=2, NotChecked=80, Total=1806 [2023-11-23 06:55:01,643 INFO L87 Difference]: Start difference. First operand 153 states and 168 transitions. Second operand has 38 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 9 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-23 06:55:04,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:55:07,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:55:12,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:55:16,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:55:18,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:55:50,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:55:52,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:11,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:13,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:15,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:21,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:24,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:29,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:36,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:38,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:41,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:43,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:45,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:48,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:51,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:53,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:56,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 06:56:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:56:56,481 INFO L93 Difference]: Finished difference Result 242 states and 275 transitions. [2023-11-23 06:56:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-23 06:56:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 9 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 73 [2023-11-23 06:56:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:56:56,483 INFO L225 Difference]: With dead ends: 242 [2023-11-23 06:56:56,483 INFO L226 Difference]: Without dead ends: 178 [2023-11-23 06:56:56,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 64.8s TimeCoverageRelationStatistics Valid=667, Invalid=4867, Unknown=20, NotChecked=146, Total=5700 [2023-11-23 06:56:56,485 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 243 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 3315 mSolverCounterSat, 60 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 3565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3315 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 58.4s IncrementalHoareTripleChecker+Time [2023-11-23 06:56:56,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 796 Invalid, 3565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3315 Invalid, 22 Unknown, 168 Unchecked, 58.4s Time] [2023-11-23 06:56:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-23 06:56:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 157. [2023-11-23 06:56:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 113 states have (on average 1.079646017699115) internal successors, (122), 117 states have internal predecessors, (122), 26 states have call successors, (26), 15 states have call predecessors, (26), 17 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2023-11-23 06:56:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2023-11-23 06:56:56,543 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 73 [2023-11-23 06:56:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:56:56,544 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2023-11-23 06:56:56,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 9 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-23 06:56:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2023-11-23 06:56:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 06:56:56,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:56:56,545 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2023-11-23 06:56:56,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-23 06:56:56,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:56:56,763 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:56:56,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:56:56,764 INFO L85 PathProgramCache]: Analyzing trace with hash -820424950, now seen corresponding path program 1 times [2023-11-23 06:56:56,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:56:56,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577138980] [2023-11-23 06:56:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:56:56,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:56:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:56:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:56:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:56:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:56:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:56:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:56:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:56:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-23 06:56:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 06:56:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 06:56:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-23 06:56:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 06:56:57,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:56:57,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577138980] [2023-11-23 06:56:57,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577138980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:56:57,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734427482] [2023-11-23 06:56:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:56:57,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:56:57,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 06:56:57,815 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 06:56:57,816 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 06:56:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:56:58,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-23 06:56:58,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 06:56:58,325 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 30 treesize of output 1 [2023-11-23 06:56:58,329 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 111 treesize of output 94 [2023-11-23 06:56:58,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 104 [2023-11-23 06:56:58,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-11-23 06:56:58,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 06:56:58,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 06:56:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 06:56:59,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 06:56:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 06:56:59,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734427482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 06:56:59,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 06:56:59,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 14] total 29 [2023-11-23 06:56:59,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778365997] [2023-11-23 06:56:59,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 06:56:59,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 06:56:59,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 06:56:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 06:56:59,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2023-11-23 06:56:59,864 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand has 29 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 10 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2023-11-23 06:57:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 06:57:03,048 INFO L93 Difference]: Finished difference Result 202 states and 219 transitions. [2023-11-23 06:57:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-23 06:57:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 10 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) Word has length 76 [2023-11-23 06:57:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 06:57:03,050 INFO L225 Difference]: With dead ends: 202 [2023-11-23 06:57:03,050 INFO L226 Difference]: Without dead ends: 179 [2023-11-23 06:57:03,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 153 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2023-11-23 06:57:03,051 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 172 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 06:57:03,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 565 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 06:57:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-23 06:57:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2023-11-23 06:57:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 125 states have (on average 1.072) internal successors, (134), 129 states have internal predecessors, (134), 28 states have call successors, (28), 18 states have call predecessors, (28), 20 states have return successors, (27), 26 states have call predecessors, (27), 25 states have call successors, (27) [2023-11-23 06:57:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 189 transitions. [2023-11-23 06:57:03,104 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 189 transitions. Word has length 76 [2023-11-23 06:57:03,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 06:57:03,104 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 189 transitions. [2023-11-23 06:57:03,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 10 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2023-11-23 06:57:03,104 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 189 transitions. [2023-11-23 06:57:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 06:57:03,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 06:57:03,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 06:57:03,123 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 06:57:03,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:57:03,321 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 06:57:03,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 06:57:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1677335285, now seen corresponding path program 1 times [2023-11-23 06:57:03,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 06:57:03,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155726705] [2023-11-23 06:57:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:57:03,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 06:57:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:05,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:57:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:05,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 06:57:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:05,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 06:57:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:05,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 06:57:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:05,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 06:57:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:05,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-23 06:57:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:05,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 06:57:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:05,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 06:57:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-23 06:57:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-23 06:57:05,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 06:57:05,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155726705] [2023-11-23 06:57:05,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155726705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 06:57:05,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682603531] [2023-11-23 06:57:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 06:57:05,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 06:57:05,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 06:57:05,521 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 06:57:05,522 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 06:57:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 06:57:06,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 2533 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-23 06:57:06,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 06:57:06,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2023-11-23 06:57:06,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 1 [2023-11-23 06:57:08,459 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14| Int)) (let ((.cse1 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14|))) (let ((.cse0 (select .cse1 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14|)))) (and (not (= (mod .cse0 18446744073709551616) 0)) (not (= (select (select |c_#memory_$Pointer$#4.base| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14|) (+ |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14| 8)) 0)) (= .cse0 (select .cse1 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14|)))))) (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14| Int)) (let ((.cse3 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14|))) (let ((.cse2 (select .cse3 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14|)))) (and (= (mod .cse2 18446744073709551616) 0) (= (select (select |c_#memory_$Pointer$#4.base| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14|) (+ |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14| 8)) 0) (= .cse2 (select .cse3 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14|))))))) is different from true [2023-11-23 06:57:11,986 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_15| Int)) (let ((.cse1 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_15|))) (let ((.cse0 (select .cse1 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_15|))) (and (= .cse0 (select .cse1 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_15|))) (not (= (mod .cse0 18446744073709551616) 0)) (not (= (select (select |c_#memory_$Pointer$#4.base| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_15|) (+ |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_15| 8)) 0)))))) (or (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14| Int)) (let ((.cse3 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14|))) (let ((.cse2 (select .cse3 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14|)))) (and (not (= (mod .cse2 18446744073709551616) 0)) (not (= (select (select |c_#memory_$Pointer$#4.base| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14|) (+ |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14| 8)) 0)) (= .cse2 (select .cse3 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14|)))))) (exists ((|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14| Int)) (let ((.cse5 (select |c_#memory_int#4| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14|))) (let ((.cse4 (select .cse5 (+ 16 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14|)))) (and (= (mod .cse4 18446744073709551616) 0) (= (select (select |c_#memory_$Pointer$#4.base| |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.base_BEFORE_CALL_14|) (+ |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14| 8)) 0) (= .cse4 (select .cse5 |v_ULTIMATE.start_aws_byte_buf_from_c_str_~#buf~0#1.offset_BEFORE_CALL_14|)))))))) is different from true [2023-11-23 06:57:17,763 INFO L349 Elim1Store]: treesize reduction 38, result has 90.9 percent of original size [2023-11-23 06:57:17,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 34 case distinctions, treesize of input 129 treesize of output 439 Killed by 15