/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-04 18:37:36,346 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-04 18:37:36,407 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-04 18:37:36,411 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-04 18:37:36,412 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-04 18:37:36,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-04 18:37:36,433 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-04 18:37:36,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-04 18:37:36,434 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-04 18:37:36,436 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-04 18:37:36,437 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-04 18:37:36,437 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-04 18:37:36,437 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-04 18:37:36,438 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-04 18:37:36,438 INFO L153 SettingsManager]: * Use SBE=true [2024-11-04 18:37:36,438 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-04 18:37:36,438 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-04 18:37:36,438 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-04 18:37:36,439 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-04 18:37:36,439 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-04 18:37:36,439 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-04 18:37:36,440 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-04 18:37:36,441 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-04 18:37:36,441 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-04 18:37:36,441 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-04 18:37:36,441 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-04 18:37:36,441 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-04 18:37:36,442 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-04 18:37:36,442 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-04 18:37:36,442 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-04 18:37:36,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-04 18:37:36,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 18:37:36,443 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-04 18:37:36,443 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-04 18:37:36,443 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-04 18:37:36,443 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-04 18:37:36,444 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-04 18:37:36,444 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-04 18:37:36,444 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-04 18:37:36,444 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-04 18:37:36,444 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-04 18:37:36,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-04 18:37:36,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-04 18:37:36,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-04 18:37:36,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-04 18:37:36,646 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-04 18:37:36,646 INFO L274 PluginConnector]: CDTParser initialized [2024-11-04 18:37:36,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2024-11-04 18:37:37,908 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-04 18:37:38,181 INFO L384 CDTParser]: Found 1 translation units. [2024-11-04 18:37:38,181 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2024-11-04 18:37:38,211 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6836ecd1/b8ba8321d2624475a3241f5e70977656/FLAG9d7b0f055 [2024-11-04 18:37:38,448 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6836ecd1/b8ba8321d2624475a3241f5e70977656 [2024-11-04 18:37:38,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-04 18:37:38,451 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-04 18:37:38,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-04 18:37:38,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-04 18:37:38,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-04 18:37:38,456 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 06:37:38" (1/1) ... [2024-11-04 18:37:38,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5742ebe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:38, skipping insertion in model container [2024-11-04 18:37:38,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 06:37:38" (1/1) ... [2024-11-04 18:37:38,530 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 18:37:39,045 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 18:37:39,046 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 18:37:39,046 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 18:37:39,047 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 18:37:39,056 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i[183784,183797] [2024-11-04 18:37:39,106 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 18:37:39,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 18:37:39,130 INFO L200 MainTranslator]: Completed pre-run [2024-11-04 18:37:39,275 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu): "0" (__pu_val), "c" ((int *)arg): "ebx"); [6057] [2024-11-04 18:37:39,277 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu): "0" (__pu_val), "c" ((int *)arg): "ebx"); [6060] [2024-11-04 18:37:39,277 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu): "0" (__pu_val), "c" ((int *)arg): "ebx"); [6063] [2024-11-04 18:37:39,277 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu): "0" (__pu_val), "c" ((int *)arg): "ebx"); [6066] [2024-11-04 18:37:39,278 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu): "0" (__pu_val), "c" ((int *)arg): "ebx"); [6069] [2024-11-04 18:37:39,286 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i[183784,183797] [2024-11-04 18:37:39,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 18:37:39,326 INFO L204 MainTranslator]: Completed translation [2024-11-04 18:37:39,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39 WrapperNode [2024-11-04 18:37:39,327 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-04 18:37:39,328 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-04 18:37:39,329 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-04 18:37:39,329 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-04 18:37:39,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,359 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,394 INFO L138 Inliner]: procedures = 72, calls = 171, calls flagged for inlining = 23, calls inlined = 16, statements flattened = 353 [2024-11-04 18:37:39,396 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-04 18:37:39,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-04 18:37:39,396 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-04 18:37:39,396 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-04 18:37:39,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,416 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,446 INFO L175 MemorySlicer]: Split 100 memory accesses to 7 slices as follows [2, 9, 78, 3, 4, 1, 3]. 78 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 4, 0, 3, 0, 0, 0]. The 81 writes are split as follows [0, 0, 78, 0, 2, 1, 0]. [2024-11-04 18:37:39,446 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,446 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,492 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,497 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,504 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,506 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-04 18:37:39,513 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-04 18:37:39,516 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-04 18:37:39,517 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-04 18:37:39,517 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (1/1) ... [2024-11-04 18:37:39,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 18:37:39,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 18:37:39,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-04 18:37:39,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-04 18:37:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-04 18:37:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-04 18:37:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-04 18:37:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-04 18:37:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-04 18:37:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-11-04 18:37:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2024-11-04 18:37:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#5 [2024-11-04 18:37:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#6 [2024-11-04 18:37:39,567 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2024-11-04 18:37:39,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2024-11-04 18:37:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-04 18:37:39,568 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-04 18:37:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-04 18:37:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-04 18:37:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-04 18:37:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-04 18:37:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-04 18:37:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-04 18:37:39,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2024-11-04 18:37:39,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-04 18:37:39,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-04 18:37:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2024-11-04 18:37:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#5 [2024-11-04 18:37:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#6 [2024-11-04 18:37:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-04 18:37:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-11-04 18:37:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2024-11-04 18:37:39,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2024-11-04 18:37:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#4 [2024-11-04 18:37:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#5 [2024-11-04 18:37:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#6 [2024-11-04 18:37:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2024-11-04 18:37:39,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2024-11-04 18:37:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2024-11-04 18:37:39,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2024-11-04 18:37:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2024-11-04 18:37:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#3 [2024-11-04 18:37:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#4 [2024-11-04 18:37:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#5 [2024-11-04 18:37:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#6 [2024-11-04 18:37:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2024-11-04 18:37:39,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2024-11-04 18:37:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-04 18:37:39,572 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-04 18:37:39,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-04 18:37:39,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-04 18:37:39,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-04 18:37:39,573 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2024-11-04 18:37:39,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2024-11-04 18:37:39,790 INFO L238 CfgBuilder]: Building ICFG [2024-11-04 18:37:39,793 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-04 18:37:39,809 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2024-11-04 18:37:48,663 INFO L? ?]: Removed 130 outVars from TransFormulas that were not future-live. [2024-11-04 18:37:48,664 INFO L287 CfgBuilder]: Performing block encoding [2024-11-04 18:37:48,672 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-04 18:37:48,672 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-04 18:37:48,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 06:37:48 BoogieIcfgContainer [2024-11-04 18:37:48,673 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-04 18:37:48,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-04 18:37:48,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-04 18:37:48,676 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-04 18:37:48,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 06:37:38" (1/3) ... [2024-11-04 18:37:48,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609aec16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 06:37:48, skipping insertion in model container [2024-11-04 18:37:48,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 06:37:39" (2/3) ... [2024-11-04 18:37:48,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609aec16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 06:37:48, skipping insertion in model container [2024-11-04 18:37:48,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 06:37:48" (3/3) ... [2024-11-04 18:37:48,678 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2024-11-04 18:37:48,688 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-04 18:37:48,688 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-04 18:37:48,736 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-04 18:37:48,740 INFO L333 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, 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;@523e832a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-04 18:37:48,740 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-04 18:37:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 78 states have internal predecessors, (100), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-04 18:37:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-04 18:37:48,751 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 18:37:48,751 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-04 18:37:48,752 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 18:37:48,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 18:37:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1136517471, now seen corresponding path program 1 times [2024-11-04 18:37:48,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 18:37:48,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124709994] [2024-11-04 18:37:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 18:37:48,766 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 18:37:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 18:37:48,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 18:37:48,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-04 18:37:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 18:37:49,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-04 18:37:49,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 18:37:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-04 18:37:49,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 18:37:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-04 18:37:51,495 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 18:37:51,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124709994] [2024-11-04 18:37:51,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [124709994] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 18:37:51,496 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 18:37:51,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-04 18:37:51,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62642770] [2024-11-04 18:37:51,498 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 18:37:51,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-04 18:37:51,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 18:37:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-04 18:37:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 18:37:51,524 INFO L87 Difference]: Start difference. First operand has 92 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 78 states have internal predecessors, (100), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-04 18:37:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 18:37:51,542 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2024-11-04 18:37:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-04 18:37:51,543 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 61 [2024-11-04 18:37:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 18:37:51,549 INFO L225 Difference]: With dead ends: 179 [2024-11-04 18:37:51,549 INFO L226 Difference]: Without dead ends: 82 [2024-11-04 18:37:51,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 18:37:51,553 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 18:37:51,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 18:37:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-04 18:37:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-04 18:37:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 67 states have (on average 1.328358208955224) internal successors, (89), 68 states have internal predecessors, (89), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-04 18:37:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2024-11-04 18:37:51,581 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 61 [2024-11-04 18:37:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 18:37:51,581 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2024-11-04 18:37:51,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-04 18:37:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2024-11-04 18:37:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-04 18:37:51,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 18:37:51,583 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-04 18:37:51,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-04 18:37:51,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 18:37:51,788 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 18:37:51,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 18:37:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash 433386269, now seen corresponding path program 1 times [2024-11-04 18:37:51,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 18:37:51,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305865968] [2024-11-04 18:37:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 18:37:51,790 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 18:37:51,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 18:37:51,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 18:37:51,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-04 18:37:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 18:37:52,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 18:37:52,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 18:37:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-04 18:37:58,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 18:38:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-04 18:38:02,470 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 18:38:02,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305865968] [2024-11-04 18:38:02,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [305865968] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 18:38:02,471 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 18:38:02,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2024-11-04 18:38:02,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310394103] [2024-11-04 18:38:02,471 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 18:38:02,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-04 18:38:02,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 18:38:02,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-04 18:38:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-04 18:38:02,473 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-04 18:38:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 18:38:02,845 INFO L93 Difference]: Finished difference Result 184 states and 248 transitions. [2024-11-04 18:38:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-04 18:38:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 61 [2024-11-04 18:38:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 18:38:02,847 INFO L225 Difference]: With dead ends: 184 [2024-11-04 18:38:02,847 INFO L226 Difference]: Without dead ends: 128 [2024-11-04 18:38:02,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-04 18:38:02,848 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-04 18:38:02,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 170 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-04 18:38:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-04 18:38:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2024-11-04 18:38:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 109 states have internal predecessors, (148), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-04 18:38:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2024-11-04 18:38:02,860 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 61 [2024-11-04 18:38:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 18:38:02,861 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2024-11-04 18:38:02,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-04 18:38:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2024-11-04 18:38:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-04 18:38:02,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 18:38:02,863 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-04 18:38:02,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-04 18:38:03,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:03,067 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 18:38:03,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 18:38:03,067 INFO L85 PathProgramCache]: Analyzing trace with hash 124332871, now seen corresponding path program 1 times [2024-11-04 18:38:03,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 18:38:03,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788806624] [2024-11-04 18:38:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 18:38:03,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:03,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 18:38:03,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 18:38:03,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-04 18:38:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 18:38:03,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 18:38:03,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 18:38:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-04 18:38:04,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 18:38:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-04 18:38:06,864 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 18:38:06,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788806624] [2024-11-04 18:38:06,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1788806624] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 18:38:06,864 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 18:38:06,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-11-04 18:38:06,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857036559] [2024-11-04 18:38:06,865 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 18:38:06,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-04 18:38:06,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 18:38:06,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-04 18:38:06,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-04 18:38:06,866 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-04 18:38:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 18:38:07,230 INFO L93 Difference]: Finished difference Result 261 states and 357 transitions. [2024-11-04 18:38:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-04 18:38:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 70 [2024-11-04 18:38:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 18:38:07,232 INFO L225 Difference]: With dead ends: 261 [2024-11-04 18:38:07,232 INFO L226 Difference]: Without dead ends: 166 [2024-11-04 18:38:07,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-04 18:38:07,233 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 60 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-04 18:38:07,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 179 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-04 18:38:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-04 18:38:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2024-11-04 18:38:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 142 states have (on average 1.3943661971830985) internal successors, (198), 143 states have internal predecessors, (198), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-04 18:38:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 216 transitions. [2024-11-04 18:38:07,244 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 216 transitions. Word has length 70 [2024-11-04 18:38:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 18:38:07,245 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 216 transitions. [2024-11-04 18:38:07,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-04 18:38:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 216 transitions. [2024-11-04 18:38:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-04 18:38:07,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 18:38:07,246 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-04 18:38:07,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-04 18:38:07,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:07,448 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 18:38:07,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 18:38:07,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1221872481, now seen corresponding path program 1 times [2024-11-04 18:38:07,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 18:38:07,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440092174] [2024-11-04 18:38:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 18:38:07,449 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:07,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 18:38:07,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 18:38:07,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-04 18:38:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 18:38:08,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-04 18:38:08,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 18:38:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-04 18:38:09,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 18:38:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-04 18:38:13,124 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 18:38:13,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440092174] [2024-11-04 18:38:13,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440092174] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 18:38:13,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 18:38:13,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-04 18:38:13,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958765458] [2024-11-04 18:38:13,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 18:38:13,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 18:38:13,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 18:38:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 18:38:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-04 18:38:13,126 INFO L87 Difference]: Start difference. First operand 159 states and 216 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-04 18:38:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 18:38:13,692 INFO L93 Difference]: Finished difference Result 300 states and 414 transitions. [2024-11-04 18:38:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 18:38:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 81 [2024-11-04 18:38:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 18:38:13,694 INFO L225 Difference]: With dead ends: 300 [2024-11-04 18:38:13,694 INFO L226 Difference]: Without dead ends: 160 [2024-11-04 18:38:13,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-04 18:38:13,696 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 0 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-04 18:38:13,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 303 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-04 18:38:13,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-04 18:38:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-11-04 18:38:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 143 states have (on average 1.3916083916083917) internal successors, (199), 144 states have internal predecessors, (199), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-04 18:38:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2024-11-04 18:38:13,714 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 81 [2024-11-04 18:38:13,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 18:38:13,714 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2024-11-04 18:38:13,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-04 18:38:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2024-11-04 18:38:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-04 18:38:13,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 18:38:13,718 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-04 18:38:13,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-04 18:38:13,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:13,919 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 18:38:13,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 18:38:13,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1173369075, now seen corresponding path program 1 times [2024-11-04 18:38:13,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 18:38:13,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329074931] [2024-11-04 18:38:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 18:38:13,920 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:13,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 18:38:13,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 18:38:13,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-04 18:38:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 18:38:15,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-04 18:38:15,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 18:38:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-04 18:38:16,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 18:38:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-04 18:38:21,999 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 18:38:21,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329074931] [2024-11-04 18:38:21,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1329074931] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 18:38:21,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 18:38:21,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 18:38:21,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057287904] [2024-11-04 18:38:21,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 18:38:22,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 18:38:22,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 18:38:22,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 18:38:22,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-04 18:38:22,001 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-04 18:38:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 18:38:24,347 INFO L93 Difference]: Finished difference Result 307 states and 424 transitions. [2024-11-04 18:38:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-04 18:38:24,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2024-11-04 18:38:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 18:38:24,349 INFO L225 Difference]: With dead ends: 307 [2024-11-04 18:38:24,349 INFO L226 Difference]: Without dead ends: 163 [2024-11-04 18:38:24,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-11-04 18:38:24,352 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 0 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-04 18:38:24,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 403 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-04 18:38:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-04 18:38:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2024-11-04 18:38:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 146 states have (on average 1.3835616438356164) internal successors, (202), 147 states have internal predecessors, (202), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-04 18:38:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 220 transitions. [2024-11-04 18:38:24,365 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 220 transitions. Word has length 83 [2024-11-04 18:38:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 18:38:24,365 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 220 transitions. [2024-11-04 18:38:24,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-04 18:38:24,366 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 220 transitions. [2024-11-04 18:38:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-04 18:38:24,370 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 18:38:24,370 INFO L215 NwaCegarLoop]: trace histogram [8, 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] [2024-11-04 18:38:24,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2024-11-04 18:38:24,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:24,571 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 18:38:24,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 18:38:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash -691684449, now seen corresponding path program 2 times [2024-11-04 18:38:24,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 18:38:24,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038751166] [2024-11-04 18:38:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 18:38:24,572 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:24,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 18:38:24,573 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 18:38:24,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-04 18:38:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 18:38:25,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-04 18:38:25,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 18:38:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 18:38:27,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 18:38:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 18:38:29,759 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 18:38:29,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038751166] [2024-11-04 18:38:29,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2038751166] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 18:38:29,760 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 18:38:29,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2024-11-04 18:38:29,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699029659] [2024-11-04 18:38:29,760 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 18:38:29,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-04 18:38:29,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 18:38:29,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-04 18:38:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-04 18:38:29,761 INFO L87 Difference]: Start difference. First operand 163 states and 220 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-04 18:38:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 18:38:30,650 INFO L93 Difference]: Finished difference Result 295 states and 407 transitions. [2024-11-04 18:38:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-04 18:38:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 89 [2024-11-04 18:38:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 18:38:30,652 INFO L225 Difference]: With dead ends: 295 [2024-11-04 18:38:30,652 INFO L226 Difference]: Without dead ends: 166 [2024-11-04 18:38:30,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-04 18:38:30,653 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 0 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-04 18:38:30,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 400 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-04 18:38:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-04 18:38:30,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2024-11-04 18:38:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 149 states have (on average 1.3691275167785235) internal successors, (204), 150 states have internal predecessors, (204), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-04 18:38:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 222 transitions. [2024-11-04 18:38:30,667 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 222 transitions. Word has length 89 [2024-11-04 18:38:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 18:38:30,668 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 222 transitions. [2024-11-04 18:38:30,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-04 18:38:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 222 transitions. [2024-11-04 18:38:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-04 18:38:30,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 18:38:30,669 INFO L215 NwaCegarLoop]: trace histogram [8, 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] [2024-11-04 18:38:30,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-04 18:38:30,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:30,874 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 18:38:30,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 18:38:30,874 INFO L85 PathProgramCache]: Analyzing trace with hash -11626079, now seen corresponding path program 1 times [2024-11-04 18:38:30,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 18:38:30,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374411224] [2024-11-04 18:38:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 18:38:30,874 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:30,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 18:38:30,877 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 18:38:30,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-04 18:38:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 18:38:31,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-04 18:38:31,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 18:38:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 18:38:32,012 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 18:38:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 18:38:34,662 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 18:38:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374411224] [2024-11-04 18:38:34,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [374411224] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 18:38:34,663 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 18:38:34,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 18:38:34,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453370584] [2024-11-04 18:38:34,663 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 18:38:34,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 18:38:34,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 18:38:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 18:38:34,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 18:38:34,664 INFO L87 Difference]: Start difference. First operand 166 states and 222 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-04 18:38:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 18:38:34,951 INFO L93 Difference]: Finished difference Result 291 states and 400 transitions. [2024-11-04 18:38:34,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-04 18:38:34,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 89 [2024-11-04 18:38:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 18:38:34,954 INFO L225 Difference]: With dead ends: 291 [2024-11-04 18:38:34,954 INFO L226 Difference]: Without dead ends: 159 [2024-11-04 18:38:34,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 18:38:34,955 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-04 18:38:34,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-04 18:38:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-04 18:38:34,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2024-11-04 18:38:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 144 states have (on average 1.3680555555555556) internal successors, (197), 145 states have internal predecessors, (197), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-04 18:38:34,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 213 transitions. [2024-11-04 18:38:34,963 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 213 transitions. Word has length 89 [2024-11-04 18:38:34,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 18:38:34,963 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 213 transitions. [2024-11-04 18:38:34,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-04 18:38:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 213 transitions. [2024-11-04 18:38:34,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-04 18:38:34,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 18:38:34,964 INFO L215 NwaCegarLoop]: trace histogram [8, 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] [2024-11-04 18:38:34,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2024-11-04 18:38:35,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:35,165 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 18:38:35,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 18:38:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash -83424347, now seen corresponding path program 1 times [2024-11-04 18:38:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 18:38:35,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549479327] [2024-11-04 18:38:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 18:38:35,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 18:38:35,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 18:38:35,167 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 18:38:35,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-04 18:38:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 18:38:36,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-04 18:38:36,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 18:38:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 18:38:45,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 18:38:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 18:38:53,095 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 18:38:53,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549479327] [2024-11-04 18:38:53,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [549479327] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 18:38:53,095 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 18:38:53,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2024-11-04 18:38:53,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089200166] [2024-11-04 18:38:53,096 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 18:38:53,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 18:38:53,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 18:38:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 18:38:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-04 18:38:53,097 INFO L87 Difference]: Start difference. First operand 159 states and 213 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-04 18:38:57,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-04 18:39:02,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-04 18:39:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 18:39:08,658 INFO L93 Difference]: Finished difference Result 496 states and 690 transitions. [2024-11-04 18:39:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-04 18:39:08,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 91 [2024-11-04 18:39:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 18:39:08,661 INFO L225 Difference]: With dead ends: 496 [2024-11-04 18:39:08,661 INFO L226 Difference]: Without dead ends: 488 [2024-11-04 18:39:08,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-04 18:39:08,664 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 427 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2024-11-04 18:39:08,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 434 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 14.6s Time] [2024-11-04 18:39:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2024-11-04 18:39:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 303. [2024-11-04 18:39:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 280 states have (on average 1.4071428571428573) internal successors, (394), 283 states have internal predecessors, (394), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-04 18:39:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 420 transitions. [2024-11-04 18:39:08,673 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 420 transitions. Word has length 91 [2024-11-04 18:39:08,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 18:39:08,673 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 420 transitions. [2024-11-04 18:39:08,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-04 18:39:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 420 transitions. [2024-11-04 18:39:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-04 18:39:08,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 18:39:08,675 INFO L215 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 18:39:08,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2024-11-04 18:39:08,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 18:39:08,876 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 18:39:08,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 18:39:08,876 INFO L85 PathProgramCache]: Analyzing trace with hash 709073474, now seen corresponding path program 1 times [2024-11-04 18:39:08,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 18:39:08,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515697043] [2024-11-04 18:39:08,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 18:39:08,877 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 18:39:08,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 18:39:08,878 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 18:39:08,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-04 18:39:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 18:39:09,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 18:39:09,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 18:39:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 18:39:10,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 18:39:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 18:39:16,734 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 18:39:16,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515697043] [2024-11-04 18:39:16,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1515697043] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 18:39:16,734 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 18:39:16,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-11-04 18:39:16,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185047510] [2024-11-04 18:39:16,734 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 18:39:16,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-04 18:39:16,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 18:39:16,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-04 18:39:16,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-04 18:39:16,736 INFO L87 Difference]: Start difference. First operand 303 states and 420 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-04 18:39:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 18:39:17,564 INFO L93 Difference]: Finished difference Result 504 states and 710 transitions. [2024-11-04 18:39:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-04 18:39:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 98 [2024-11-04 18:39:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 18:39:17,570 INFO L225 Difference]: With dead ends: 504 [2024-11-04 18:39:17,570 INFO L226 Difference]: Without dead ends: 303 [2024-11-04 18:39:17,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-04 18:39:17,571 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-04 18:39:17,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-04 18:39:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2024-11-04 18:39:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2024-11-04 18:39:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 280 states have (on average 1.3928571428571428) internal successors, (390), 283 states have internal predecessors, (390), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-04 18:39:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 416 transitions. [2024-11-04 18:39:17,583 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 416 transitions. Word has length 98 [2024-11-04 18:39:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 18:39:17,583 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 416 transitions. [2024-11-04 18:39:17,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-04 18:39:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 416 transitions. [2024-11-04 18:39:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-04 18:39:17,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 18:39:17,584 INFO L215 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 18:39:17,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-04 18:39:17,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 18:39:17,785 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 18:39:17,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 18:39:17,786 INFO L85 PathProgramCache]: Analyzing trace with hash -311994880, now seen corresponding path program 1 times [2024-11-04 18:39:17,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 18:39:17,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993745766] [2024-11-04 18:39:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 18:39:17,786 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 18:39:17,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 18:39:17,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 18:39:17,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-04 18:39:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 18:39:19,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-04 18:39:19,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 18:39:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 18:39:22,630 INFO L311 TraceCheckSpWp]: Computing backward predicates...