./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness.i --full-output --preprocessor.use.memory.slicer true --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version abd6749d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_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 efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 07:34:32,197 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 07:34:32,235 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 07:34:32,238 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 07:34:32,239 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 07:34:32,252 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 07:34:32,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 07:34:32,253 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 07:34:32,254 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 07:34:32,258 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 07:34:32,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 07:34:32,258 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 07:34:32,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 07:34:32,260 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 07:34:32,260 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 07:34:32,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 07:34:32,261 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 07:34:32,262 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 07:34:32,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 07:34:32,262 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 07:34:32,262 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 07:34:32,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 07:34:32,263 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 07:34:32,263 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 07:34:32,264 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 07:34:32,264 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 07:34:32,264 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 07:34:32,264 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 07:34:32,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:34:32,265 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 07:34:32,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 07:34:32,266 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 07:34:32,266 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 07:34:32,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 07:34:32,266 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 07:34:32,266 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 07:34:32,267 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 07:34:32,267 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 07:34:32,267 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 07:34:32,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-23 07:34:32,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 07:34:32,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 07:34:32,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 07:34:32,457 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 07:34:32,457 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 07:34:32,458 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness.i [2023-11-23 07:34:33,424 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 07:34:33,790 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 07:34:33,791 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness.i [2023-11-23 07:34:33,821 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44cbc12da/a23b8a9b6c85475ab4411564e9b2fe5f/FLAG640d71a38 [2023-11-23 07:34:33,838 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44cbc12da/a23b8a9b6c85475ab4411564e9b2fe5f [2023-11-23 07:34:33,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 07:34:33,841 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 07:34:33,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 07:34:33,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 07:34:33,850 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 07:34:33,852 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:34:33" (1/1) ... [2023-11-23 07:34:33,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76dbf02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:33, skipping insertion in model container [2023-11-23 07:34:33,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:34:33" (1/1) ... [2023-11-23 07:34:33,925 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 07:34:34,072 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2023-11-23 07:34:34,077 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2023-11-23 07:34:34,544 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,556 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,557 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,557 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,559 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,567 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,574 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,575 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,576 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,802 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:34:34,803 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:34:34,804 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:34:34,807 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:34:34,812 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:34:34,813 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:34:34,814 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:34:34,815 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:34:34,817 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:34:34,819 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:34:34,925 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,925 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:34,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:34:35,002 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 07:34:35,012 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2023-11-23 07:34:35,012 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2023-11-23 07:34:35,040 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,041 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,041 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,041 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,046 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,050 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,054 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,055 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,056 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,104 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:34:35,105 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:34:35,105 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:34:35,106 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:34:35,109 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:34:35,109 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:34:35,110 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:34:35,110 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:34:35,110 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:34:35,111 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:34:35,147 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,147 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:34:35,159 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-11-23 07:34:35,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:34:35,289 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,290 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,290 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,290 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,290 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,290 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,290 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,291 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,291 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,291 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,291 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,291 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,292 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,292 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,292 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:34:35,298 INFO L206 MainTranslator]: Completed translation [2023-11-23 07:34:35,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35 WrapperNode [2023-11-23 07:34:35,298 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 07:34:35,299 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 07:34:35,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 07:34:35,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 07:34:35,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,393 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,442 INFO L138 Inliner]: procedures = 688, calls = 1498, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 596 [2023-11-23 07:34:35,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 07:34:35,451 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 07:34:35,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 07:34:35,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 07:34:35,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,475 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,535 INFO L188 MemorySlicer]: Split 284 memory accesses to 6 slices as follows [2, 236, 34, 3, 6, 3]. 83 percent of accesses are in the largest equivalence class. The 247 initializations are split as follows [2, 236, 0, 1, 5, 3]. The 6 writes are split as follows [0, 0, 5, 1, 0, 0]. [2023-11-23 07:34:35,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,567 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,573 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,590 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,594 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 07:34:35,609 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 07:34:35,609 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 07:34:35,609 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 07:34:35,609 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (1/1) ... [2023-11-23 07:34:35,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:34:35,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:35,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 07:34:35,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 07:34:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 07:34:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 07:34:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 07:34:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-23 07:34:35,687 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-23 07:34:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 07:34:35,687 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 07:34:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 07:34:35,688 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 07:34:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 07:34:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 07:34:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 07:34:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 07:34:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 07:34:35,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 07:34:35,689 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 07:34:35,689 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 07:34:35,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 07:34:35,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 07:34:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 07:34:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 07:34:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 07:34:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 07:34:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 07:34:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 07:34:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 07:34:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-23 07:34:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 07:34:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 07:34:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2023-11-23 07:34:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2023-11-23 07:34:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 07:34:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 07:34:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 07:34:35,691 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 07:34:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-23 07:34:35,692 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-23 07:34:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-23 07:34:35,692 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-23 07:34:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 07:34:35,692 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 07:34:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 07:34:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 07:34:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 07:34:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 07:34:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 07:34:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 07:34:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-23 07:34:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-23 07:34:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-23 07:34:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-23 07:34:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-23 07:34:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-23 07:34:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-23 07:34:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 07:34:35,694 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 07:34:35,695 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 07:34:35,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 07:34:35,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 07:34:35,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 07:34:35,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 07:34:35,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 07:34:35,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 07:34:35,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 07:34:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-23 07:34:35,696 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-23 07:34:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-23 07:34:35,696 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-23 07:34:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-23 07:34:35,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-23 07:34:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 07:34:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 07:34:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 07:34:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 07:34:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 07:34:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 07:34:35,946 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 07:34:35,948 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 07:34:36,482 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 07:34:36,549 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 07:34:36,549 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 07:34:36,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:34:36 BoogieIcfgContainer [2023-11-23 07:34:36,550 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 07:34:36,552 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 07:34:36,552 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 07:34:36,554 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 07:34:36,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 07:34:33" (1/3) ... [2023-11-23 07:34:36,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792b32ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:34:36, skipping insertion in model container [2023-11-23 07:34:36,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:34:35" (2/3) ... [2023-11-23 07:34:36,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792b32ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:34:36, skipping insertion in model container [2023-11-23 07:34:36,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:34:36" (3/3) ... [2023-11-23 07:34:36,556 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2023-11-23 07:34:36,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 07:34:36,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 07:34:36,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 07:34:36,608 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;@1925b9b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 07:34:36,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 07:34:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 96 states have internal predecessors, (125), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-23 07:34:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-23 07:34:36,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:36,628 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:36,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:36,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:36,633 INFO L85 PathProgramCache]: Analyzing trace with hash -273287374, now seen corresponding path program 1 times [2023-11-23 07:34:36,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:36,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804064523] [2023-11-23 07:34:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:36,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:34:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:34:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:34:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:34:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 07:34:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 07:34:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-23 07:34:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-11-23 07:34:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-23 07:34:37,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:37,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804064523] [2023-11-23 07:34:37,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804064523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:37,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:37,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:34:37,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569420916] [2023-11-23 07:34:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:37,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:34:37,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:34:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:34:37,547 INFO L87 Difference]: Start difference. First operand has 148 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 96 states have internal predecessors, (125), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 07:34:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:38,161 INFO L93 Difference]: Finished difference Result 329 states and 472 transitions. [2023-11-23 07:34:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 07:34:38,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 98 [2023-11-23 07:34:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:38,174 INFO L225 Difference]: With dead ends: 329 [2023-11-23 07:34:38,174 INFO L226 Difference]: Without dead ends: 187 [2023-11-23 07:34:38,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:34:38,182 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 163 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:38,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 174 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 07:34:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-23 07:34:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 146. [2023-11-23 07:34:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 95 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 07:34:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2023-11-23 07:34:38,240 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 98 [2023-11-23 07:34:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:38,241 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2023-11-23 07:34:38,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 07:34:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2023-11-23 07:34:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 07:34:38,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:38,249 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:38,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 07:34:38,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:38,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:38,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1304949155, now seen corresponding path program 1 times [2023-11-23 07:34:38,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:38,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120775048] [2023-11-23 07:34:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:38,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:34:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:34:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:34:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:34:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 07:34:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 07:34:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 07:34:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-23 07:34:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-23 07:34:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 07:34:38,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:38,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120775048] [2023-11-23 07:34:38,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120775048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:34:38,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244024290] [2023-11-23 07:34:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:38,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:38,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:38,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:38,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 07:34:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:39,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 07:34:39,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 07:34:39,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:39,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244024290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:39,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:34:39,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-11-23 07:34:39,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752504650] [2023-11-23 07:34:39,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:39,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 07:34:39,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:39,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 07:34:39,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:34:39,233 INFO L87 Difference]: Start difference. First operand 146 states and 187 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 07:34:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:39,363 INFO L93 Difference]: Finished difference Result 283 states and 365 transitions. [2023-11-23 07:34:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 07:34:39,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 113 [2023-11-23 07:34:39,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:39,365 INFO L225 Difference]: With dead ends: 283 [2023-11-23 07:34:39,365 INFO L226 Difference]: Without dead ends: 147 [2023-11-23 07:34:39,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:34:39,366 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:39,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 340 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 07:34:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-23 07:34:39,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-11-23 07:34:39,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 96 states have internal predecessors, (119), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 07:34:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2023-11-23 07:34:39,381 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 113 [2023-11-23 07:34:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:39,381 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2023-11-23 07:34:39,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 07:34:39,382 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2023-11-23 07:34:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 07:34:39,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:39,383 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:39,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:39,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:39,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:39,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:39,603 INFO L85 PathProgramCache]: Analyzing trace with hash -790784473, now seen corresponding path program 1 times [2023-11-23 07:34:39,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:39,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419083078] [2023-11-23 07:34:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:39,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:39,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:39,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:34:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:39,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:39,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:34:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:39,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:39,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:39,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:34:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:34:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 07:34:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-23 07:34:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 07:34:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-23 07:34:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-23 07:34:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-23 07:34:40,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:40,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419083078] [2023-11-23 07:34:40,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419083078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:40,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:40,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 07:34:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357656210] [2023-11-23 07:34:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:40,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 07:34:40,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 07:34:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:34:40,271 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 07:34:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:41,559 INFO L93 Difference]: Finished difference Result 319 states and 426 transitions. [2023-11-23 07:34:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 07:34:41,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 113 [2023-11-23 07:34:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:41,565 INFO L225 Difference]: With dead ends: 319 [2023-11-23 07:34:41,565 INFO L226 Difference]: Without dead ends: 230 [2023-11-23 07:34:41,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:34:41,570 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 252 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:41,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 554 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 07:34:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-23 07:34:41,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 147. [2023-11-23 07:34:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 96 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 07:34:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 187 transitions. [2023-11-23 07:34:41,588 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 187 transitions. Word has length 113 [2023-11-23 07:34:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:41,589 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 187 transitions. [2023-11-23 07:34:41,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 07:34:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 187 transitions. [2023-11-23 07:34:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-23 07:34:41,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:41,590 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:41,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 07:34:41,590 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:41,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:41,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1815710381, now seen corresponding path program 1 times [2023-11-23 07:34:41,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:41,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747549117] [2023-11-23 07:34:41,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:41,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:41,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:41,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 07:34:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:41,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:41,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 07:34:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:41,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:41,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:41,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-23 07:34:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:41,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:34:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-23 07:34:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-23 07:34:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-23 07:34:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 07:34:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 07:34:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 07:34:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-23 07:34:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-23 07:34:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-23 07:34:42,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747549117] [2023-11-23 07:34:42,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747549117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:42,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:42,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 07:34:42,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422034331] [2023-11-23 07:34:42,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:42,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 07:34:42,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:42,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 07:34:42,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-23 07:34:42,231 INFO L87 Difference]: Start difference. First operand 147 states and 187 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 07:34:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:43,940 INFO L93 Difference]: Finished difference Result 349 states and 467 transitions. [2023-11-23 07:34:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 07:34:43,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 121 [2023-11-23 07:34:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:43,942 INFO L225 Difference]: With dead ends: 349 [2023-11-23 07:34:43,942 INFO L226 Difference]: Without dead ends: 211 [2023-11-23 07:34:43,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-23 07:34:43,943 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 326 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:43,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 671 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 07:34:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-23 07:34:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2023-11-23 07:34:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.2526315789473683) internal successors, (119), 98 states have internal predecessors, (119), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-11-23 07:34:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 190 transitions. [2023-11-23 07:34:43,966 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 190 transitions. Word has length 121 [2023-11-23 07:34:43,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:43,966 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 190 transitions. [2023-11-23 07:34:43,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 07:34:43,967 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 190 transitions. [2023-11-23 07:34:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-23 07:34:43,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:43,969 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:43,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 07:34:43,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:43,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:43,970 INFO L85 PathProgramCache]: Analyzing trace with hash -161022385, now seen corresponding path program 1 times [2023-11-23 07:34:43,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:43,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798160464] [2023-11-23 07:34:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:43,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:44,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:44,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293989397] [2023-11-23 07:34:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:44,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:44,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:44,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 07:34:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:44,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 07:34:44,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-23 07:34:44,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:44,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:44,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798160464] [2023-11-23 07:34:44,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:44,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293989397] [2023-11-23 07:34:44,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293989397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:44,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:44,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 07:34:44,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893466812] [2023-11-23 07:34:44,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:44,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:34:44,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:44,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:34:44,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:34:44,517 INFO L87 Difference]: Start difference. First operand 149 states and 190 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-23 07:34:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:44,704 INFO L93 Difference]: Finished difference Result 241 states and 304 transitions. [2023-11-23 07:34:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 07:34:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 134 [2023-11-23 07:34:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:44,705 INFO L225 Difference]: With dead ends: 241 [2023-11-23 07:34:44,705 INFO L226 Difference]: Without dead ends: 149 [2023-11-23 07:34:44,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 07:34:44,706 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 48 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:44,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 741 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-23 07:34:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-23 07:34:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 98 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-11-23 07:34:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 189 transitions. [2023-11-23 07:34:44,717 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 189 transitions. Word has length 134 [2023-11-23 07:34:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:44,717 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 189 transitions. [2023-11-23 07:34:44,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-23 07:34:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 189 transitions. [2023-11-23 07:34:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-23 07:34:44,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:44,719 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:44,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:44,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:44,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:44,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:44,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1410615974, now seen corresponding path program 1 times [2023-11-23 07:34:44,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:44,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888684238] [2023-11-23 07:34:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:44,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:44,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935425763] [2023-11-23 07:34:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:44,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:44,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:44,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:45,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 07:34:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:45,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 2841 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 07:34:45,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-23 07:34:45,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:45,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:45,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888684238] [2023-11-23 07:34:45,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:45,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935425763] [2023-11-23 07:34:45,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935425763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:45,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:45,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 07:34:45,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004048165] [2023-11-23 07:34:45,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:45,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 07:34:45,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:45,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 07:34:45,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:34:45,531 INFO L87 Difference]: Start difference. First operand 149 states and 189 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-23 07:34:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:45,855 INFO L93 Difference]: Finished difference Result 254 states and 322 transitions. [2023-11-23 07:34:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 07:34:45,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 150 [2023-11-23 07:34:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:45,856 INFO L225 Difference]: With dead ends: 254 [2023-11-23 07:34:45,856 INFO L226 Difference]: Without dead ends: 149 [2023-11-23 07:34:45,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 07:34:45,857 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 99 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:45,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 981 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:34:45,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-23 07:34:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-23 07:34:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 98 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-23 07:34:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2023-11-23 07:34:45,867 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 150 [2023-11-23 07:34:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:45,867 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2023-11-23 07:34:45,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-23 07:34:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2023-11-23 07:34:45,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-23 07:34:45,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:45,869 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:45,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:46,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:46,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:46,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1995158902, now seen corresponding path program 1 times [2023-11-23 07:34:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:46,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539188598] [2023-11-23 07:34:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:46,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:46,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:46,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278291392] [2023-11-23 07:34:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:46,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:46,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:46,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:46,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 07:34:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:46,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 3020 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 07:34:46,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-23 07:34:46,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:34:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-23 07:34:46,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:46,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539188598] [2023-11-23 07:34:46,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:46,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278291392] [2023-11-23 07:34:46,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278291392] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 07:34:46,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:34:46,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-23 07:34:46,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450159598] [2023-11-23 07:34:46,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:46,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:34:46,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:46,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:34:46,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 07:34:46,839 INFO L87 Difference]: Start difference. First operand 149 states and 188 transitions. Second operand has 6 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-23 07:34:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:47,092 INFO L93 Difference]: Finished difference Result 159 states and 202 transitions. [2023-11-23 07:34:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 07:34:47,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 163 [2023-11-23 07:34:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:47,094 INFO L225 Difference]: With dead ends: 159 [2023-11-23 07:34:47,094 INFO L226 Difference]: Without dead ends: 157 [2023-11-23 07:34:47,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-23 07:34:47,095 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 6 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:47,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 835 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-23 07:34:47,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2023-11-23 07:34:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 103 states have internal predecessors, (122), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-23 07:34:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 199 transitions. [2023-11-23 07:34:47,105 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 199 transitions. Word has length 163 [2023-11-23 07:34:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:47,107 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 199 transitions. [2023-11-23 07:34:47,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-23 07:34:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 199 transitions. [2023-11-23 07:34:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-23 07:34:47,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:47,109 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:47,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:47,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:47,316 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:47,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:47,317 INFO L85 PathProgramCache]: Analyzing trace with hash -427096703, now seen corresponding path program 1 times [2023-11-23 07:34:47,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:47,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105628978] [2023-11-23 07:34:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:47,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:47,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:47,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841734295] [2023-11-23 07:34:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:47,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:47,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:47,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:47,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 07:34:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:47,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 3023 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 07:34:47,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-23 07:34:47,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:47,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:47,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105628978] [2023-11-23 07:34:47,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:47,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841734295] [2023-11-23 07:34:47,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841734295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:47,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:47,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 07:34:47,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176567422] [2023-11-23 07:34:47,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:47,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 07:34:47,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 07:34:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:34:47,901 INFO L87 Difference]: Start difference. First operand 156 states and 199 transitions. Second operand has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 07:34:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:48,183 INFO L93 Difference]: Finished difference Result 253 states and 321 transitions. [2023-11-23 07:34:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:34:48,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 163 [2023-11-23 07:34:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:48,184 INFO L225 Difference]: With dead ends: 253 [2023-11-23 07:34:48,184 INFO L226 Difference]: Without dead ends: 156 [2023-11-23 07:34:48,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:34:48,185 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 9 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:48,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 819 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:34:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-23 07:34:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-11-23 07:34:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 103 states have internal predecessors, (121), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-23 07:34:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 198 transitions. [2023-11-23 07:34:48,195 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 198 transitions. Word has length 163 [2023-11-23 07:34:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:48,195 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 198 transitions. [2023-11-23 07:34:48,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 07:34:48,195 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 198 transitions. [2023-11-23 07:34:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-23 07:34:48,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:48,196 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:48,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:48,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:48,413 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:48,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:48,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1532014553, now seen corresponding path program 1 times [2023-11-23 07:34:48,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:48,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562623438] [2023-11-23 07:34:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:48,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:48,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:48,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701892787] [2023-11-23 07:34:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:48,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:48,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:48,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:48,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 07:34:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:48,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 3031 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 07:34:48,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-23 07:34:49,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:49,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562623438] [2023-11-23 07:34:49,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701892787] [2023-11-23 07:34:49,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701892787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:49,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:49,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 07:34:49,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265138211] [2023-11-23 07:34:49,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:49,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 07:34:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:49,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 07:34:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 07:34:49,017 INFO L87 Difference]: Start difference. First operand 156 states and 198 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 07:34:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:49,276 INFO L93 Difference]: Finished difference Result 255 states and 322 transitions. [2023-11-23 07:34:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 07:34:49,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 165 [2023-11-23 07:34:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:49,278 INFO L225 Difference]: With dead ends: 255 [2023-11-23 07:34:49,278 INFO L226 Difference]: Without dead ends: 157 [2023-11-23 07:34:49,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-23 07:34:49,279 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 11 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:49,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 819 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-23 07:34:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-11-23 07:34:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 100 states have (on average 1.22) internal successors, (122), 104 states have internal predecessors, (122), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-23 07:34:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 199 transitions. [2023-11-23 07:34:49,291 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 199 transitions. Word has length 165 [2023-11-23 07:34:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:49,291 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 199 transitions. [2023-11-23 07:34:49,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 07:34:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 199 transitions. [2023-11-23 07:34:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-23 07:34:49,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:49,293 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:49,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:49,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:49,509 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:49,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1395715541, now seen corresponding path program 1 times [2023-11-23 07:34:49,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:49,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858469877] [2023-11-23 07:34:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:49,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:49,573 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:49,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653180235] [2023-11-23 07:34:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:49,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:49,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:49,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:49,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 07:34:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:50,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 3050 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 07:34:50,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-23 07:34:50,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:50,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:50,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858469877] [2023-11-23 07:34:50,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:50,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653180235] [2023-11-23 07:34:50,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653180235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:50,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:50,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:34:50,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889707808] [2023-11-23 07:34:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:50,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:34:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:34:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:34:50,071 INFO L87 Difference]: Start difference. First operand 157 states and 199 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:34:50,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:50,294 INFO L93 Difference]: Finished difference Result 266 states and 344 transitions. [2023-11-23 07:34:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 07:34:50,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 166 [2023-11-23 07:34:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:50,296 INFO L225 Difference]: With dead ends: 266 [2023-11-23 07:34:50,296 INFO L226 Difference]: Without dead ends: 161 [2023-11-23 07:34:50,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:34:50,297 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 6 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:50,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 478 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-23 07:34:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2023-11-23 07:34:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 105 states have internal predecessors, (123), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-23 07:34:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 200 transitions. [2023-11-23 07:34:50,307 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 200 transitions. Word has length 166 [2023-11-23 07:34:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:50,307 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 200 transitions. [2023-11-23 07:34:50,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:34:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 200 transitions. [2023-11-23 07:34:50,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-23 07:34:50,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:50,309 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:50,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:50,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:50,524 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:50,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2061364277, now seen corresponding path program 1 times [2023-11-23 07:34:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:50,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846753241] [2023-11-23 07:34:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:50,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:50,586 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:50,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143862898] [2023-11-23 07:34:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:50,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:50,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:50,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:50,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 07:34:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:51,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 07:34:51,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-23 07:34:51,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:51,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:51,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846753241] [2023-11-23 07:34:51,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:51,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143862898] [2023-11-23 07:34:51,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143862898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:51,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:51,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:34:51,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955223753] [2023-11-23 07:34:51,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:51,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:34:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:51,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:34:51,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:34:51,197 INFO L87 Difference]: Start difference. First operand 158 states and 200 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:34:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:51,365 INFO L93 Difference]: Finished difference Result 185 states and 232 transitions. [2023-11-23 07:34:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 07:34:51,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 166 [2023-11-23 07:34:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:51,367 INFO L225 Difference]: With dead ends: 185 [2023-11-23 07:34:51,367 INFO L226 Difference]: Without dead ends: 159 [2023-11-23 07:34:51,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 163 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 07:34:51,368 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 0 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:51,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 502 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-23 07:34:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-11-23 07:34:51,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 105 states have internal predecessors, (124), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 36 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-23 07:34:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 201 transitions. [2023-11-23 07:34:51,377 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 201 transitions. Word has length 166 [2023-11-23 07:34:51,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:51,378 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 201 transitions. [2023-11-23 07:34:51,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:34:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 201 transitions. [2023-11-23 07:34:51,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-23 07:34:51,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:51,379 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:51,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 07:34:51,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 07:34:51,596 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:51,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:51,597 INFO L85 PathProgramCache]: Analyzing trace with hash -283033575, now seen corresponding path program 1 times [2023-11-23 07:34:51,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:51,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565121406] [2023-11-23 07:34:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:51,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:51,644 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:51,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472878582] [2023-11-23 07:34:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:51,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:51,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:51,646 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:51,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 07:34:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:52,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 3060 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 07:34:52,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 07:34:52,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:52,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:52,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565121406] [2023-11-23 07:34:52,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:52,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472878582] [2023-11-23 07:34:52,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472878582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:52,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:52,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 07:34:52,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893393404] [2023-11-23 07:34:52,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:52,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:34:52,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:52,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:34:52,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:34:52,248 INFO L87 Difference]: Start difference. First operand 159 states and 201 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:34:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:52,452 INFO L93 Difference]: Finished difference Result 261 states and 331 transitions. [2023-11-23 07:34:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 07:34:52,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 168 [2023-11-23 07:34:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:52,457 INFO L225 Difference]: With dead ends: 261 [2023-11-23 07:34:52,457 INFO L226 Difference]: Without dead ends: 165 [2023-11-23 07:34:52,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 07:34:52,459 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 4 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:52,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 675 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-23 07:34:52,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2023-11-23 07:34:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 104 states have (on average 1.2115384615384615) internal successors, (126), 106 states have internal predecessors, (126), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 37 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-23 07:34:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 203 transitions. [2023-11-23 07:34:52,471 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 203 transitions. Word has length 168 [2023-11-23 07:34:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:52,471 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 203 transitions. [2023-11-23 07:34:52,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:34:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 203 transitions. [2023-11-23 07:34:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-23 07:34:52,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:52,473 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:52,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:52,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:52,678 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:52,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:52,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1996370485, now seen corresponding path program 2 times [2023-11-23 07:34:52,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:52,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645179508] [2023-11-23 07:34:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:52,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:52,743 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:52,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817474613] [2023-11-23 07:34:52,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:34:52,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:52,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:52,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:52,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 07:34:53,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:34:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:34:53,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-23 07:34:53,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:53,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:34:53,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 07:34:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-23 07:34:53,931 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:53,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645179508] [2023-11-23 07:34:53,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817474613] [2023-11-23 07:34:53,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817474613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:53,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-23 07:34:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430143672] [2023-11-23 07:34:53,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:53,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 07:34:53,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 07:34:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-23 07:34:53,933 INFO L87 Difference]: Start difference. First operand 161 states and 203 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 8 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-23 07:34:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:55,557 INFO L93 Difference]: Finished difference Result 288 states and 365 transitions. [2023-11-23 07:34:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 07:34:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 8 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 170 [2023-11-23 07:34:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:55,558 INFO L225 Difference]: With dead ends: 288 [2023-11-23 07:34:55,558 INFO L226 Difference]: Without dead ends: 183 [2023-11-23 07:34:55,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2023-11-23 07:34:55,559 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 182 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:55,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 681 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 07:34:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-23 07:34:55,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2023-11-23 07:34:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 118 states have (on average 1.228813559322034) internal successors, (145), 120 states have internal predecessors, (145), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2023-11-23 07:34:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 225 transitions. [2023-11-23 07:34:55,570 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 225 transitions. Word has length 170 [2023-11-23 07:34:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:55,571 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 225 transitions. [2023-11-23 07:34:55,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 8 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-23 07:34:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 225 transitions. [2023-11-23 07:34:55,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-23 07:34:55,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:55,572 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:55,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:55,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 07:34:55,784 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:55,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1410094263, now seen corresponding path program 1 times [2023-11-23 07:34:55,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:55,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655895954] [2023-11-23 07:34:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:55,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:55,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:55,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21339668] [2023-11-23 07:34:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:55,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:55,855 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:55,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 07:34:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:56,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 07:34:56,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-23 07:34:56,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:56,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655895954] [2023-11-23 07:34:56,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21339668] [2023-11-23 07:34:56,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21339668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:56,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:56,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 07:34:56,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077738989] [2023-11-23 07:34:56,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:56,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:34:56,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:56,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:34:56,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 07:34:56,390 INFO L87 Difference]: Start difference. First operand 176 states and 225 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:34:56,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:56,528 INFO L93 Difference]: Finished difference Result 314 states and 407 transitions. [2023-11-23 07:34:56,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:34:56,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 170 [2023-11-23 07:34:56,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:56,530 INFO L225 Difference]: With dead ends: 314 [2023-11-23 07:34:56,530 INFO L226 Difference]: Without dead ends: 179 [2023-11-23 07:34:56,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:34:56,531 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 7 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:56,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 502 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 07:34:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-23 07:34:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2023-11-23 07:34:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 120 states have internal predecessors, (144), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2023-11-23 07:34:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 224 transitions. [2023-11-23 07:34:56,545 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 224 transitions. Word has length 170 [2023-11-23 07:34:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:56,545 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 224 transitions. [2023-11-23 07:34:56,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 07:34:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 224 transitions. [2023-11-23 07:34:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-23 07:34:56,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:56,547 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:56,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:56,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 07:34:56,760 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:56,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1573790949, now seen corresponding path program 1 times [2023-11-23 07:34:56,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:56,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182104220] [2023-11-23 07:34:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:56,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:56,815 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:56,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678051322] [2023-11-23 07:34:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:56,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:56,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:56,816 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:56,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 07:34:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:57,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 3069 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 07:34:57,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 07:34:57,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:34:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-23 07:34:57,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:57,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182104220] [2023-11-23 07:34:57,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:57,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678051322] [2023-11-23 07:34:57,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678051322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:34:57,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:34:57,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-11-23 07:34:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944665068] [2023-11-23 07:34:57,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:34:57,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 07:34:57,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:57,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 07:34:57,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-23 07:34:57,850 INFO L87 Difference]: Start difference. First operand 176 states and 224 transitions. Second operand has 12 states, 10 states have (on average 11.0) internal successors, (110), 12 states have internal predecessors, (110), 4 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 2 states have call predecessors, (29), 4 states have call successors, (29) [2023-11-23 07:34:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:58,338 INFO L93 Difference]: Finished difference Result 305 states and 405 transitions. [2023-11-23 07:34:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 07:34:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 11.0) internal successors, (110), 12 states have internal predecessors, (110), 4 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 2 states have call predecessors, (29), 4 states have call successors, (29) Word has length 172 [2023-11-23 07:34:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:58,340 INFO L225 Difference]: With dead ends: 305 [2023-11-23 07:34:58,340 INFO L226 Difference]: Without dead ends: 188 [2023-11-23 07:34:58,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-11-23 07:34:58,340 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 33 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:58,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1081 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 07:34:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-23 07:34:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 182. [2023-11-23 07:34:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 124 states have (on average 1.2338709677419355) internal successors, (153), 126 states have internal predecessors, (153), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2023-11-23 07:34:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 233 transitions. [2023-11-23 07:34:58,356 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 233 transitions. Word has length 172 [2023-11-23 07:34:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:58,357 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 233 transitions. [2023-11-23 07:34:58,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 11.0) internal successors, (110), 12 states have internal predecessors, (110), 4 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 2 states have call predecessors, (29), 4 states have call successors, (29) [2023-11-23 07:34:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 233 transitions. [2023-11-23 07:34:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-23 07:34:58,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:58,358 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:58,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:58,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 07:34:58,568 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:58,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1100917232, now seen corresponding path program 1 times [2023-11-23 07:34:58,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:58,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726776192] [2023-11-23 07:34:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:58,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:58,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344076552] [2023-11-23 07:34:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:58,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:58,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:58,629 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:58,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 07:34:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:59,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 3160 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 07:34:59,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-23 07:34:59,239 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:34:59,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:59,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726776192] [2023-11-23 07:34:59,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:34:59,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344076552] [2023-11-23 07:34:59,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344076552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:59,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:59,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 07:34:59,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471329493] [2023-11-23 07:34:59,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:59,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 07:34:59,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:59,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 07:34:59,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 07:34:59,241 INFO L87 Difference]: Start difference. First operand 182 states and 233 transitions. Second operand has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 8 states have internal predecessors, (86), 6 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-23 07:34:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:59,591 INFO L93 Difference]: Finished difference Result 303 states and 385 transitions. [2023-11-23 07:34:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 07:34:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 8 states have internal predecessors, (86), 6 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) Word has length 182 [2023-11-23 07:34:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:59,593 INFO L225 Difference]: With dead ends: 303 [2023-11-23 07:34:59,593 INFO L226 Difference]: Without dead ends: 180 [2023-11-23 07:34:59,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:34:59,594 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 44 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:59,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1021 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:34:59,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-23 07:34:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-23 07:34:59,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 123 states have (on average 1.2276422764227641) internal successors, (151), 124 states have internal predecessors, (151), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (43), 38 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-23 07:34:59,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 230 transitions. [2023-11-23 07:34:59,624 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 230 transitions. Word has length 182 [2023-11-23 07:34:59,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:59,625 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 230 transitions. [2023-11-23 07:34:59,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 8 states have internal predecessors, (86), 6 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-23 07:34:59,626 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 230 transitions. [2023-11-23 07:34:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-11-23 07:34:59,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:59,627 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:59,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 07:34:59,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 07:34:59,844 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:59,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:59,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2058842171, now seen corresponding path program 2 times [2023-11-23 07:34:59,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:59,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059979105] [2023-11-23 07:34:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:59,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:59,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:34:59,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738334628] [2023-11-23 07:34:59,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:34:59,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:59,912 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:34:59,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 07:35:00,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:35:00,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:00,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 3111 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 07:35:00,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 57 proven. 11 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-23 07:35:00,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2023-11-23 07:35:00,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:00,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059979105] [2023-11-23 07:35:00,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:00,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738334628] [2023-11-23 07:35:00,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738334628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:00,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:00,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-11-23 07:35:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767868638] [2023-11-23 07:35:00,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:00,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 07:35:00,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:00,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 07:35:00,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-23 07:35:00,920 INFO L87 Difference]: Start difference. First operand 180 states and 230 transitions. Second operand has 16 states, 14 states have (on average 7.142857142857143) internal successors, (100), 16 states have internal predecessors, (100), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2023-11-23 07:35:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:01,814 INFO L93 Difference]: Finished difference Result 297 states and 382 transitions. [2023-11-23 07:35:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 07:35:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 7.142857142857143) internal successors, (100), 16 states have internal predecessors, (100), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 184 [2023-11-23 07:35:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:01,816 INFO L225 Difference]: With dead ends: 297 [2023-11-23 07:35:01,816 INFO L226 Difference]: Without dead ends: 185 [2023-11-23 07:35:01,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 351 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-23 07:35:01,817 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 20 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:01,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1865 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 07:35:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-23 07:35:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2023-11-23 07:35:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 124 states have (on average 1.2258064516129032) internal successors, (152), 125 states have internal predecessors, (152), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (43), 38 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-23 07:35:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 231 transitions. [2023-11-23 07:35:01,834 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 231 transitions. Word has length 184 [2023-11-23 07:35:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:01,835 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 231 transitions. [2023-11-23 07:35:01,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 7.142857142857143) internal successors, (100), 16 states have internal predecessors, (100), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2023-11-23 07:35:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 231 transitions. [2023-11-23 07:35:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-23 07:35:01,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:01,840 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:01,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:02,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:02,048 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:02,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:02,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1339598859, now seen corresponding path program 3 times [2023-11-23 07:35:02,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:02,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486659815] [2023-11-23 07:35:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:02,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:02,097 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:02,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570065023] [2023-11-23 07:35:02,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:35:02,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:02,099 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:02,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 07:35:02,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 07:35:02,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:02,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 07:35:02,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-11-23 07:35:02,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2023-11-23 07:35:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:03,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486659815] [2023-11-23 07:35:03,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:03,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570065023] [2023-11-23 07:35:03,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570065023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:03,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:03,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-23 07:35:03,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143932944] [2023-11-23 07:35:03,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:03,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 07:35:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:03,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 07:35:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-23 07:35:03,034 INFO L87 Difference]: Start difference. First operand 181 states and 231 transitions. Second operand has 15 states, 13 states have (on average 7.153846153846154) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:03,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:03,359 INFO L93 Difference]: Finished difference Result 295 states and 372 transitions. [2023-11-23 07:35:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 07:35:03,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 7.153846153846154) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 185 [2023-11-23 07:35:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:03,361 INFO L225 Difference]: With dead ends: 295 [2023-11-23 07:35:03,361 INFO L226 Difference]: Without dead ends: 182 [2023-11-23 07:35:03,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-23 07:35:03,362 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 12 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:03,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1296 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:35:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-23 07:35:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-11-23 07:35:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 125 states have (on average 1.224) internal successors, (153), 126 states have internal predecessors, (153), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (43), 38 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-23 07:35:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 232 transitions. [2023-11-23 07:35:03,371 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 232 transitions. Word has length 185 [2023-11-23 07:35:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:03,372 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 232 transitions. [2023-11-23 07:35:03,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 7.153846153846154) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 07:35:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 232 transitions. [2023-11-23 07:35:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-11-23 07:35:03,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:03,373 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:03,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:03,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 07:35:03,591 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:03,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash 517892667, now seen corresponding path program 4 times [2023-11-23 07:35:03,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:03,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780779474] [2023-11-23 07:35:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:03,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:03,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:03,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923339602] [2023-11-23 07:35:03,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 07:35:03,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:03,637 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:03,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 07:35:04,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 07:35:04,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:04,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 3149 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 07:35:04,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 57 proven. 22 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-23 07:35:04,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2023-11-23 07:35:04,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:04,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780779474] [2023-11-23 07:35:04,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:04,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923339602] [2023-11-23 07:35:04,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923339602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:35:04,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:35:04,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2023-11-23 07:35:04,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585893574] [2023-11-23 07:35:04,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:04,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 07:35:04,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 07:35:04,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-11-23 07:35:04,642 INFO L87 Difference]: Start difference. First operand 182 states and 232 transitions. Second operand has 22 states, 20 states have (on average 5.35) internal successors, (107), 22 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2023-11-23 07:35:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:35:05,743 INFO L93 Difference]: Finished difference Result 306 states and 400 transitions. [2023-11-23 07:35:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 07:35:05,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 5.35) internal successors, (107), 22 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 186 [2023-11-23 07:35:05,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:35:05,745 INFO L225 Difference]: With dead ends: 306 [2023-11-23 07:35:05,745 INFO L226 Difference]: Without dead ends: 192 [2023-11-23 07:35:05,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-11-23 07:35:05,746 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 31 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 07:35:05,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2221 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 07:35:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-23 07:35:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2023-11-23 07:35:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 126 states have (on average 1.2222222222222223) internal successors, (154), 127 states have internal predecessors, (154), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (43), 38 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-23 07:35:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 233 transitions. [2023-11-23 07:35:05,759 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 233 transitions. Word has length 186 [2023-11-23 07:35:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:35:05,759 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 233 transitions. [2023-11-23 07:35:05,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 5.35) internal successors, (107), 22 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2023-11-23 07:35:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 233 transitions. [2023-11-23 07:35:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-23 07:35:05,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:35:05,761 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:35:05,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 07:35:05,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:05,972 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:35:05,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:35:05,973 INFO L85 PathProgramCache]: Analyzing trace with hash 814804491, now seen corresponding path program 5 times [2023-11-23 07:35:05,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:35:05,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676876851] [2023-11-23 07:35:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:35:05,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:35:06,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:35:06,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548737350] [2023-11-23 07:35:06,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 07:35:06,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:35:06,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:35:06,024 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:35:06,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 07:35:06,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-23 07:35:06,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:35:06,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 145 conjunts are in the unsatisfiable core [2023-11-23 07:35:06,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:35:06,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 07:35:06,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 07:35:08,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2023-11-23 07:35:08,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2023-11-23 07:35:10,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:35:10,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2023-11-23 07:35:10,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 07:35:12,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-23 07:35:12,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:35:12,953 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 26 treesize of output 10 [2023-11-23 07:35:13,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-23 07:35:17,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-23 07:35:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 51 proven. 3 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-23 07:35:29,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:35:33,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-23 07:35:33,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-11-23 07:35:33,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-11-23 07:35:35,341 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (and (forall ((v_aws_array_list_is_valid_~list.offset_BEFORE_CALL_4 Int) (v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4 Int)) (= (select (select |c_#memory_$Pointer$#2.offset| v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4) (+ 32 v_aws_array_list_is_valid_~list.offset_BEFORE_CALL_4)) 0)) (forall ((v_aws_array_list_is_valid_~list.offset_BEFORE_CALL_4 Int) (v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4 Int)) (= (select (select |c_#memory_$Pointer$#2.base| v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4) (+ 32 v_aws_array_list_is_valid_~list.offset_BEFORE_CALL_4)) 0))))) (and (or (and (forall ((|v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4| Int) (|v_aws_array_list_is_valid_#in~list.offset_BEFORE_CALL_4| Int)) (= (select (select |c_#memory_$Pointer$#2.base| |v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4|) (+ 32 |v_aws_array_list_is_valid_#in~list.offset_BEFORE_CALL_4|)) 0)) (forall ((|v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4| Int) (|v_aws_array_list_is_valid_#in~list.offset_BEFORE_CALL_4| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4|) (+ 32 |v_aws_array_list_is_valid_#in~list.offset_BEFORE_CALL_4|)) 0))) (and (forall ((v_aws_array_list_is_valid_~list.offset_BEFORE_CALL_4 Int) (v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4 Int)) (let ((.cse0 (+ 32 v_aws_array_list_is_valid_~list.offset_BEFORE_CALL_4))) (or (= (select (select |c_#memory_$Pointer$#2.offset| v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4) .cse0) 0) (not (= (select (select |c_old(#memory_$Pointer$#2.offset)| v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4) .cse0) 0)) (not (= (select (select |c_old(#memory_$Pointer$#2.base)| v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4) .cse0) 0))))) (forall ((v_aws_array_list_is_valid_~list.offset_BEFORE_CALL_4 Int) (v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4 Int)) (let ((.cse1 (+ 32 v_aws_array_list_is_valid_~list.offset_BEFORE_CALL_4))) (or (not (= (select (select |c_old(#memory_$Pointer$#2.offset)| v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4) .cse1) 0)) (not (= (select (select |c_old(#memory_$Pointer$#2.base)| v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4) .cse1) 0)) (= (select (select |c_#memory_$Pointer$#2.base| v_aws_array_list_is_valid_~list.base_BEFORE_CALL_4) .cse1) 0)))))) (or (forall ((|v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4| Int) (|v_aws_array_list_is_valid_#in~list.offset_BEFORE_CALL_4| Int)) (let ((.cse2 (+ 32 |v_aws_array_list_is_valid_#in~list.offset_BEFORE_CALL_4|))) (or (not (= (select (select |c_old(#memory_$Pointer$#2.base)| |v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4|) .cse2) 0)) (not (= (select (select |c_old(#memory_$Pointer$#2.offset)| |v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4|) .cse2) 0)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4|) .cse2) 0)))) .cse3) (or .cse3 (forall ((|v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4| Int) (|v_aws_array_list_is_valid_#in~list.offset_BEFORE_CALL_4| Int)) (let ((.cse4 (+ 32 |v_aws_array_list_is_valid_#in~list.offset_BEFORE_CALL_4|))) (or (= (select (select |c_#memory_$Pointer$#2.base| |v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4|) .cse4) 0) (not (= (select (select |c_old(#memory_$Pointer$#2.base)| |v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4|) .cse4) 0)) (not (= (select (select |c_old(#memory_$Pointer$#2.offset)| |v_aws_array_list_is_valid_#in~list.base_BEFORE_CALL_4|) .cse4) 0)))))))) is different from false [2023-11-23 07:35:35,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:35:35,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676876851] [2023-11-23 07:35:35,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:35:35,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548737350] [2023-11-23 07:35:35,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548737350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:35:35,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:35:35,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-11-23 07:35:35,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192427361] [2023-11-23 07:35:35,461 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:35:35,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-23 07:35:35,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:35:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-23 07:35:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1621, Unknown=13, NotChecked=84, Total=1980 [2023-11-23 07:35:35,463 INFO L87 Difference]: Start difference. First operand 183 states and 233 transitions. Second operand has 34 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 31 states have internal predecessors, (92), 13 states have call successors, (24), 4 states have call predecessors, (24), 10 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2023-11-23 07:36:00,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:36:02,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:36:14,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:36:16,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:36:19,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:36:21,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:36:23,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:36:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:23,702 INFO L93 Difference]: Finished difference Result 474 states and 618 transitions. [2023-11-23 07:36:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-23 07:36:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 31 states have internal predecessors, (92), 13 states have call successors, (24), 4 states have call predecessors, (24), 10 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) Word has length 187 [2023-11-23 07:36:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:23,704 INFO L225 Difference]: With dead ends: 474 [2023-11-23 07:36:23,704 INFO L226 Difference]: Without dead ends: 361 [2023-11-23 07:36:23,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 253 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 57.5s TimeCoverageRelationStatistics Valid=809, Invalid=5486, Unknown=29, NotChecked=156, Total=6480 [2023-11-23 07:36:23,706 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 434 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 133 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:23,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1377 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2630 Invalid, 9 Unknown, 0 Unchecked, 17.7s Time] [2023-11-23 07:36:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-11-23 07:36:23,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 314. [2023-11-23 07:36:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 221 states have (on average 1.244343891402715) internal successors, (275), 225 states have internal predecessors, (275), 58 states have call successors, (58), 31 states have call predecessors, (58), 34 states have return successors, (78), 58 states have call predecessors, (78), 57 states have call successors, (78) [2023-11-23 07:36:23,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 411 transitions. [2023-11-23 07:36:23,758 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 411 transitions. Word has length 187 [2023-11-23 07:36:23,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:23,758 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 411 transitions. [2023-11-23 07:36:23,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 31 states have internal predecessors, (92), 13 states have call successors, (24), 4 states have call predecessors, (24), 10 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2023-11-23 07:36:23,758 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 411 transitions. [2023-11-23 07:36:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-23 07:36:23,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:23,760 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:23,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:23,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:23,975 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:23,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2139813669, now seen corresponding path program 1 times [2023-11-23 07:36:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:23,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786432800] [2023-11-23 07:36:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:23,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:24,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:24,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241251250] [2023-11-23 07:36:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:24,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:24,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:24,027 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:36:24,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 07:36:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:36:25,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 07:36:25,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-23 07:36:25,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-23 07:36:25,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:25,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786432800] [2023-11-23 07:36:25,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:25,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241251250] [2023-11-23 07:36:25,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241251250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:25,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:25,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-23 07:36:25,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323346579] [2023-11-23 07:36:25,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:25,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 07:36:25,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 07:36:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-23 07:36:25,566 INFO L87 Difference]: Start difference. First operand 314 states and 411 transitions. Second operand has 14 states, 14 states have (on average 8.5) internal successors, (119), 14 states have internal predecessors, (119), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-23 07:36:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:26,155 INFO L93 Difference]: Finished difference Result 593 states and 833 transitions. [2023-11-23 07:36:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 07:36:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 14 states have internal predecessors, (119), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 189 [2023-11-23 07:36:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:26,158 INFO L225 Difference]: With dead ends: 593 [2023-11-23 07:36:26,158 INFO L226 Difference]: Without dead ends: 374 [2023-11-23 07:36:26,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2023-11-23 07:36:26,159 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 92 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:26,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1017 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 07:36:26,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-23 07:36:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 338. [2023-11-23 07:36:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 245 states have (on average 1.2693877551020407) internal successors, (311), 249 states have internal predecessors, (311), 58 states have call successors, (58), 31 states have call predecessors, (58), 34 states have return successors, (78), 58 states have call predecessors, (78), 57 states have call successors, (78) [2023-11-23 07:36:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 447 transitions. [2023-11-23 07:36:26,194 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 447 transitions. Word has length 189 [2023-11-23 07:36:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:26,195 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 447 transitions. [2023-11-23 07:36:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 14 states have internal predecessors, (119), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-23 07:36:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 447 transitions. [2023-11-23 07:36:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-23 07:36:26,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:26,198 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:26,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:26,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:26,408 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:26,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:26,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1263472781, now seen corresponding path program 1 times [2023-11-23 07:36:26,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:26,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918983209] [2023-11-23 07:36:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:26,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:26,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:26,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078715095] [2023-11-23 07:36:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:26,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:26,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:26,469 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:36:26,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 07:36:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:36:27,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 3831 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 07:36:27,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 126 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-23 07:36:27,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-23 07:36:27,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:27,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918983209] [2023-11-23 07:36:27,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078715095] [2023-11-23 07:36:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078715095] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:27,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:27,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-23 07:36:27,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099239590] [2023-11-23 07:36:27,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:27,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 07:36:27,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 07:36:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-23 07:36:27,620 INFO L87 Difference]: Start difference. First operand 338 states and 447 transitions. Second operand has 19 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 19 states have internal predecessors, (135), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:28,168 INFO L93 Difference]: Finished difference Result 490 states and 643 transitions. [2023-11-23 07:36:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 07:36:28,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 19 states have internal predecessors, (135), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 257 [2023-11-23 07:36:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:28,171 INFO L225 Difference]: With dead ends: 490 [2023-11-23 07:36:28,171 INFO L226 Difference]: Without dead ends: 339 [2023-11-23 07:36:28,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 494 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-23 07:36:28,172 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 12 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:28,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1618 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 07:36:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-23 07:36:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2023-11-23 07:36:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 246 states have (on average 1.2682926829268293) internal successors, (312), 250 states have internal predecessors, (312), 58 states have call successors, (58), 31 states have call predecessors, (58), 34 states have return successors, (78), 58 states have call predecessors, (78), 57 states have call successors, (78) [2023-11-23 07:36:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 448 transitions. [2023-11-23 07:36:28,198 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 448 transitions. Word has length 257 [2023-11-23 07:36:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:28,198 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 448 transitions. [2023-11-23 07:36:28,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 19 states have internal predecessors, (135), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 448 transitions. [2023-11-23 07:36:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-23 07:36:28,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:28,200 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:28,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:28,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:28,421 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:28,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:28,421 INFO L85 PathProgramCache]: Analyzing trace with hash 149377871, now seen corresponding path program 2 times [2023-11-23 07:36:28,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:28,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498027667] [2023-11-23 07:36:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:28,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:28,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:28,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438143356] [2023-11-23 07:36:28,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:36:28,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:28,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:28,485 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:36:28,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 07:36:29,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:36:29,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:29,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 3869 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-23 07:36:29,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 137 proven. 15 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2023-11-23 07:36:29,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-11-23 07:36:29,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:29,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498027667] [2023-11-23 07:36:29,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:29,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438143356] [2023-11-23 07:36:29,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438143356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:29,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:29,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-23 07:36:29,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890797364] [2023-11-23 07:36:29,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:29,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 07:36:29,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:29,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 07:36:29,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-23 07:36:30,000 INFO L87 Difference]: Start difference. First operand 339 states and 448 transitions. Second operand has 21 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 21 states have internal predecessors, (137), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:30,610 INFO L93 Difference]: Finished difference Result 492 states and 645 transitions. [2023-11-23 07:36:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 07:36:30,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 21 states have internal predecessors, (137), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 259 [2023-11-23 07:36:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:30,613 INFO L225 Difference]: With dead ends: 492 [2023-11-23 07:36:30,613 INFO L226 Difference]: Without dead ends: 340 [2023-11-23 07:36:30,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 496 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-23 07:36:30,614 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 16 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:30,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1616 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 07:36:30,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-23 07:36:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2023-11-23 07:36:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 247 states have (on average 1.2672064777327936) internal successors, (313), 251 states have internal predecessors, (313), 58 states have call successors, (58), 31 states have call predecessors, (58), 34 states have return successors, (78), 58 states have call predecessors, (78), 57 states have call successors, (78) [2023-11-23 07:36:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 449 transitions. [2023-11-23 07:36:30,645 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 449 transitions. Word has length 259 [2023-11-23 07:36:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:30,645 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 449 transitions. [2023-11-23 07:36:30,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 21 states have internal predecessors, (137), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 449 transitions. [2023-11-23 07:36:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-11-23 07:36:30,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:30,648 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:30,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:30,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-23 07:36:30,864 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:30,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:30,865 INFO L85 PathProgramCache]: Analyzing trace with hash 783995775, now seen corresponding path program 1 times [2023-11-23 07:36:30,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:30,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780645089] [2023-11-23 07:36:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:30,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:30,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:30,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097998825] [2023-11-23 07:36:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:30,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:30,926 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:36:30,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-23 07:36:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:36:31,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 3878 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-23 07:36:31,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 150 proven. 21 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-11-23 07:36:31,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2023-11-23 07:36:32,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:32,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780645089] [2023-11-23 07:36:32,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:32,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097998825] [2023-11-23 07:36:32,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097998825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:32,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:32,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-23 07:36:32,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747665937] [2023-11-23 07:36:32,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:32,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 07:36:32,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:32,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 07:36:32,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-23 07:36:32,166 INFO L87 Difference]: Start difference. First operand 340 states and 449 transitions. Second operand has 23 states, 21 states have (on average 6.238095238095238) internal successors, (131), 23 states have internal predecessors, (131), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (37), 6 states have call predecessors, (37), 6 states have call successors, (37) [2023-11-23 07:36:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:32,957 INFO L93 Difference]: Finished difference Result 494 states and 647 transitions. [2023-11-23 07:36:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 07:36:32,960 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 6.238095238095238) internal successors, (131), 23 states have internal predecessors, (131), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (37), 6 states have call predecessors, (37), 6 states have call successors, (37) Word has length 258 [2023-11-23 07:36:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:32,963 INFO L225 Difference]: With dead ends: 494 [2023-11-23 07:36:32,963 INFO L226 Difference]: Without dead ends: 341 [2023-11-23 07:36:32,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 492 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-23 07:36:32,964 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 11 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:32,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2427 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 07:36:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-23 07:36:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2023-11-23 07:36:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 248 states have (on average 1.2661290322580645) internal successors, (314), 252 states have internal predecessors, (314), 58 states have call successors, (58), 31 states have call predecessors, (58), 34 states have return successors, (78), 58 states have call predecessors, (78), 57 states have call successors, (78) [2023-11-23 07:36:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 450 transitions. [2023-11-23 07:36:32,990 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 450 transitions. Word has length 258 [2023-11-23 07:36:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:32,991 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 450 transitions. [2023-11-23 07:36:32,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 6.238095238095238) internal successors, (131), 23 states have internal predecessors, (131), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (37), 6 states have call predecessors, (37), 6 states have call successors, (37) [2023-11-23 07:36:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 450 transitions. [2023-11-23 07:36:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-11-23 07:36:32,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:32,993 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:33,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-23 07:36:33,200 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:33,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash 652308559, now seen corresponding path program 3 times [2023-11-23 07:36:33,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:33,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407585457] [2023-11-23 07:36:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:33,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:33,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:33,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464975092] [2023-11-23 07:36:33,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:36:33,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:33,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:33,266 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:36:33,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-23 07:36:36,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-23 07:36:36,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:36,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 2629 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-23 07:36:36,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 109 proven. 28 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2023-11-23 07:36:36,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-23 07:36:37,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:37,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407585457] [2023-11-23 07:36:37,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:37,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464975092] [2023-11-23 07:36:37,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464975092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:37,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:37,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-23 07:36:37,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651492776] [2023-11-23 07:36:37,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:37,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 07:36:37,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:37,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 07:36:37,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-11-23 07:36:37,343 INFO L87 Difference]: Start difference. First operand 341 states and 450 transitions. Second operand has 25 states, 23 states have (on average 5.260869565217392) internal successors, (121), 25 states have internal predecessors, (121), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2023-11-23 07:36:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:38,539 INFO L93 Difference]: Finished difference Result 496 states and 649 transitions. [2023-11-23 07:36:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 07:36:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 5.260869565217392) internal successors, (121), 25 states have internal predecessors, (121), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 263 [2023-11-23 07:36:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:38,541 INFO L225 Difference]: With dead ends: 496 [2023-11-23 07:36:38,541 INFO L226 Difference]: Without dead ends: 342 [2023-11-23 07:36:38,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2023-11-23 07:36:38,542 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 12 mSDsluCounter, 2095 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:38,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2260 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 07:36:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-23 07:36:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2023-11-23 07:36:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 249 states have (on average 1.2650602409638554) internal successors, (315), 253 states have internal predecessors, (315), 58 states have call successors, (58), 31 states have call predecessors, (58), 34 states have return successors, (78), 58 states have call predecessors, (78), 57 states have call successors, (78) [2023-11-23 07:36:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 451 transitions. [2023-11-23 07:36:38,568 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 451 transitions. Word has length 263 [2023-11-23 07:36:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:38,569 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 451 transitions. [2023-11-23 07:36:38,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 5.260869565217392) internal successors, (121), 25 states have internal predecessors, (121), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2023-11-23 07:36:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 451 transitions. [2023-11-23 07:36:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-23 07:36:38,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:38,571 INFO L195 NwaCegarLoop]: trace histogram [16, 13, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:38,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:38,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:38,784 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:38,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash -429967501, now seen corresponding path program 4 times [2023-11-23 07:36:38,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:38,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255033876] [2023-11-23 07:36:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:38,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:38,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:38,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557942609] [2023-11-23 07:36:38,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 07:36:38,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:38,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:38,855 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:36:38,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-23 07:36:39,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 07:36:39,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:39,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 3983 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-23 07:36:39,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 182 proven. 36 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-23 07:36:39,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2023-11-23 07:36:40,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:40,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255033876] [2023-11-23 07:36:40,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:40,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557942609] [2023-11-23 07:36:40,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557942609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:40,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:40,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-11-23 07:36:40,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080308777] [2023-11-23 07:36:40,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:40,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 07:36:40,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:40,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 07:36:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2023-11-23 07:36:40,204 INFO L87 Difference]: Start difference. First operand 342 states and 451 transitions. Second operand has 27 states, 25 states have (on average 5.72) internal successors, (143), 27 states have internal predecessors, (143), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:41,030 INFO L93 Difference]: Finished difference Result 498 states and 651 transitions. [2023-11-23 07:36:41,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 07:36:41,030 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 5.72) internal successors, (143), 27 states have internal predecessors, (143), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 265 [2023-11-23 07:36:41,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:41,032 INFO L225 Difference]: With dead ends: 498 [2023-11-23 07:36:41,032 INFO L226 Difference]: Without dead ends: 343 [2023-11-23 07:36:41,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 502 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2023-11-23 07:36:41,033 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 16 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:41,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1938 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 07:36:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-23 07:36:41,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2023-11-23 07:36:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 250 states have (on average 1.264) internal successors, (316), 254 states have internal predecessors, (316), 58 states have call successors, (58), 31 states have call predecessors, (58), 34 states have return successors, (78), 58 states have call predecessors, (78), 57 states have call successors, (78) [2023-11-23 07:36:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 452 transitions. [2023-11-23 07:36:41,058 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 452 transitions. Word has length 265 [2023-11-23 07:36:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:41,058 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 452 transitions. [2023-11-23 07:36:41,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 5.72) internal successors, (143), 27 states have internal predecessors, (143), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 452 transitions. [2023-11-23 07:36:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-23 07:36:41,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:41,060 INFO L195 NwaCegarLoop]: trace histogram [18, 13, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:41,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:41,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:41,278 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:41,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:41,279 INFO L85 PathProgramCache]: Analyzing trace with hash 663366991, now seen corresponding path program 5 times [2023-11-23 07:36:41,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:41,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476145841] [2023-11-23 07:36:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:41,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:41,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:41,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901202655] [2023-11-23 07:36:41,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 07:36:41,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:41,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:41,347 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:36:41,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-23 07:36:41,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-23 07:36:41,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:41,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-23 07:36:41,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:41,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-23 07:36:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2023-11-23 07:36:41,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 07:36:41,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:41,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476145841] [2023-11-23 07:36:41,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:41,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901202655] [2023-11-23 07:36:41,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901202655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:36:41,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:36:41,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 07:36:41,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88283753] [2023-11-23 07:36:41,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:36:41,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 07:36:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 07:36:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-23 07:36:41,999 INFO L87 Difference]: Start difference. First operand 343 states and 452 transitions. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 6 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 07:36:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:42,968 INFO L93 Difference]: Finished difference Result 637 states and 839 transitions. [2023-11-23 07:36:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 07:36:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 6 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 267 [2023-11-23 07:36:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:42,971 INFO L225 Difference]: With dead ends: 637 [2023-11-23 07:36:42,971 INFO L226 Difference]: Without dead ends: 374 [2023-11-23 07:36:42,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-11-23 07:36:42,972 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 226 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:42,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 740 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 07:36:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-23 07:36:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 354. [2023-11-23 07:36:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 260 states have (on average 1.2538461538461538) internal successors, (326), 264 states have internal predecessors, (326), 58 states have call successors, (58), 31 states have call predecessors, (58), 35 states have return successors, (81), 59 states have call predecessors, (81), 57 states have call successors, (81) [2023-11-23 07:36:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 465 transitions. [2023-11-23 07:36:42,998 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 465 transitions. Word has length 267 [2023-11-23 07:36:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:42,999 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 465 transitions. [2023-11-23 07:36:42,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 6 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2023-11-23 07:36:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 465 transitions. [2023-11-23 07:36:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-23 07:36:43,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:43,001 INFO L195 NwaCegarLoop]: trace histogram [18, 13, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:43,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:43,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-23 07:36:43,216 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:43,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash -26464499, now seen corresponding path program 1 times [2023-11-23 07:36:43,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:43,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171944185] [2023-11-23 07:36:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:43,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:43,288 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:43,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456542350] [2023-11-23 07:36:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:43,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:43,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:43,290 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:36:43,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-23 07:36:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:36:44,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 4016 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-23 07:36:44,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 201 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-11-23 07:36:44,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-11-23 07:36:44,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:44,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171944185] [2023-11-23 07:36:44,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:44,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456542350] [2023-11-23 07:36:44,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456542350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:36:44,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:36:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-11-23 07:36:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906004871] [2023-11-23 07:36:44,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:44,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 07:36:44,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 07:36:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-11-23 07:36:44,711 INFO L87 Difference]: Start difference. First operand 354 states and 465 transitions. Second operand has 29 states, 27 states have (on average 5.37037037037037) internal successors, (145), 29 states have internal predecessors, (145), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:45,604 INFO L93 Difference]: Finished difference Result 516 states and 672 transitions. [2023-11-23 07:36:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 07:36:45,605 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 5.37037037037037) internal successors, (145), 29 states have internal predecessors, (145), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 267 [2023-11-23 07:36:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:45,609 INFO L225 Difference]: With dead ends: 516 [2023-11-23 07:36:45,609 INFO L226 Difference]: Without dead ends: 355 [2023-11-23 07:36:45,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 504 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-11-23 07:36:45,611 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 10 mSDsluCounter, 2582 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:45,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2747 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 07:36:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-11-23 07:36:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2023-11-23 07:36:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 261 states have (on average 1.2528735632183907) internal successors, (327), 265 states have internal predecessors, (327), 58 states have call successors, (58), 31 states have call predecessors, (58), 35 states have return successors, (81), 59 states have call predecessors, (81), 57 states have call successors, (81) [2023-11-23 07:36:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 466 transitions. [2023-11-23 07:36:45,635 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 466 transitions. Word has length 267 [2023-11-23 07:36:45,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:45,636 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 466 transitions. [2023-11-23 07:36:45,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 5.37037037037037) internal successors, (145), 29 states have internal predecessors, (145), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-23 07:36:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 466 transitions. [2023-11-23 07:36:45,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-23 07:36:45,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:45,638 INFO L195 NwaCegarLoop]: trace histogram [20, 13, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:45,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:45,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-23 07:36:45,856 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:45,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:45,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1302214743, now seen corresponding path program 2 times [2023-11-23 07:36:45,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:45,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121830268] [2023-11-23 07:36:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:45,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:45,922 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:45,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609768103] [2023-11-23 07:36:45,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:36:45,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:45,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:45,924 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:36:45,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-23 07:36:46,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:36:46,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:36:46,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 4059 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-23 07:36:46,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:46,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:36:46,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:36:47,015 WARN L876 $PredicateComparison]: unable to prove that (exists ((ensure_array_list_has_allocated_data_member_~list.offset Int)) (and (= (store |c_old(#memory_$Pointer$#2.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base| (store (select |c_old(#memory_$Pointer$#2.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) ensure_array_list_has_allocated_data_member_~list.offset (select (select |c_#memory_$Pointer$#2.base| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) ensure_array_list_has_allocated_data_member_~list.offset))) |c_#memory_$Pointer$#2.base|) (= (store |c_old(#memory_$Pointer$#2.offset)| |c_ensure_array_list_has_allocated_data_member_#in~list.base| (store (select |c_old(#memory_$Pointer$#2.offset)| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) ensure_array_list_has_allocated_data_member_~list.offset (select (select |c_#memory_$Pointer$#2.offset| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) ensure_array_list_has_allocated_data_member_~list.offset))) |c_#memory_$Pointer$#2.offset|) (<= |c_ensure_array_list_has_allocated_data_member_#in~list.offset| ensure_array_list_has_allocated_data_member_~list.offset))) is different from true [2023-11-23 07:36:47,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:47,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 07:36:47,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:47,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 07:36:47,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-23 07:36:47,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-23 07:36:47,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 07:36:47,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-23 07:36:47,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:36:47,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 07:36:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 239 proven. 10 refuted. 0 times theorem prover too weak. 362 trivial. 2 not checked. [2023-11-23 07:36:47,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:47,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:47,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121830268] [2023-11-23 07:36:47,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:47,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609768103] [2023-11-23 07:36:47,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609768103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:36:47,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:36:47,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-23 07:36:47,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490890003] [2023-11-23 07:36:47,841 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:47,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 07:36:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 07:36:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=327, Unknown=1, NotChecked=36, Total=420 [2023-11-23 07:36:47,843 INFO L87 Difference]: Start difference. First operand 355 states and 466 transitions. Second operand has 17 states, 15 states have (on average 7.733333333333333) internal successors, (116), 16 states have internal predecessors, (116), 12 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2023-11-23 07:36:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:36:52,223 INFO L93 Difference]: Finished difference Result 790 states and 1045 transitions. [2023-11-23 07:36:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 07:36:52,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 7.733333333333333) internal successors, (116), 16 states have internal predecessors, (116), 12 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) Word has length 271 [2023-11-23 07:36:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:36:52,226 INFO L225 Difference]: With dead ends: 790 [2023-11-23 07:36:52,226 INFO L226 Difference]: Without dead ends: 609 [2023-11-23 07:36:52,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=4, NotChecked=56, Total=930 [2023-11-23 07:36:52,228 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 189 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 2104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 07:36:52,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1539 Invalid, 2104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1701 Invalid, 0 Unknown, 318 Unchecked, 2.0s Time] [2023-11-23 07:36:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2023-11-23 07:36:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 593. [2023-11-23 07:36:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 447 states have (on average 1.261744966442953) internal successors, (564), 454 states have internal predecessors, (564), 89 states have call successors, (89), 50 states have call predecessors, (89), 56 states have return successors, (135), 89 states have call predecessors, (135), 88 states have call successors, (135) [2023-11-23 07:36:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 788 transitions. [2023-11-23 07:36:52,275 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 788 transitions. Word has length 271 [2023-11-23 07:36:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:36:52,275 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 788 transitions. [2023-11-23 07:36:52,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 7.733333333333333) internal successors, (116), 16 states have internal predecessors, (116), 12 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 10 states have call predecessors, (31), 12 states have call successors, (31) [2023-11-23 07:36:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 788 transitions. [2023-11-23 07:36:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-11-23 07:36:52,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:36:52,278 INFO L195 NwaCegarLoop]: trace histogram [20, 13, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:36:52,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-23 07:36:52,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-23 07:36:52,491 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:36:52,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:36:52,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1034656181, now seen corresponding path program 1 times [2023-11-23 07:36:52,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:36:52,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898357645] [2023-11-23 07:36:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:52,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:36:52,560 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 07:36:52,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539221957] [2023-11-23 07:36:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:36:52,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:36:52,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:36:52,562 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 07:36:52,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-23 07:36:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:36:53,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 4088 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-23 07:36:53,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:36:53,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 07:36:53,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-23 07:36:55,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 07:36:55,739 WARN L876 $PredicateComparison]: unable to prove that (exists ((ensure_array_list_has_allocated_data_member_~list.offset Int)) (and (<= |c_ensure_array_list_has_allocated_data_member_#in~list.offset| ensure_array_list_has_allocated_data_member_~list.offset) (= |c_#memory_$Pointer$#2.base| (store |c_old(#memory_$Pointer$#2.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base| (let ((.cse1 (select |c_#memory_$Pointer$#2.base| |c_ensure_array_list_has_allocated_data_member_#in~list.base|))) (store (let ((.cse0 (+ ensure_array_list_has_allocated_data_member_~list.offset 32))) (store (select |c_old(#memory_$Pointer$#2.base)| |c_ensure_array_list_has_allocated_data_member_#in~list.base|) .cse0 (select .cse1 .cse0))) ensure_array_list_has_allocated_data_member_~list.offset (select .cse1 ensure_array_list_has_allocated_data_member_~list.offset))))))) is different from true [2023-11-23 07:36:55,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:55,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 07:36:55,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 12 [2023-11-23 07:36:55,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-23 07:36:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 257 proven. 18 refuted. 0 times theorem prover too weak. 345 trivial. 2 not checked. [2023-11-23 07:36:56,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:36:58,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:36:58,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898357645] [2023-11-23 07:36:58,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 07:36:58,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539221957] [2023-11-23 07:36:58,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539221957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:36:58,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 07:36:58,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-23 07:36:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733573746] [2023-11-23 07:36:58,589 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 07:36:58,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 07:36:58,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:36:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 07:36:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=766, Unknown=3, NotChecked=56, Total=930 [2023-11-23 07:36:58,591 INFO L87 Difference]: Start difference. First operand 593 states and 788 transitions. Second operand has 24 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 15 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (32), 13 states have call predecessors, (32), 15 states have call successors, (32) [2023-11-23 07:37:00,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:03,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:05,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:07,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:09,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:13,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:15,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:17,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:20,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:22,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:24,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:26,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:32,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:35,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:37,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:41,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:47,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:49,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:51,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:54,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:56,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:37:58,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:00,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:02,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:06,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:09,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:11,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:13,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:25,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:42,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:44,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:55,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 07:38:57,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] Killed by 15