/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-356b6ba-m [2024-11-01 06:55:54,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-01 06:55:54,361 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-01 06:55:54,366 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-01 06:55:54,366 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-01 06:55:54,421 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-01 06:55:54,422 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-01 06:55:54,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-01 06:55:54,422 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-01 06:55:54,423 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-01 06:55:54,426 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-01 06:55:54,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-01 06:55:54,427 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-01 06:55:54,428 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-01 06:55:54,428 INFO L153 SettingsManager]: * Use SBE=true [2024-11-01 06:55:54,429 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-01 06:55:54,430 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-01 06:55:54,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-01 06:55:54,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-01 06:55:54,433 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-01 06:55:54,434 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-01 06:55:54,435 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-01 06:55:54,435 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-01 06:55:54,436 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-01 06:55:54,436 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-01 06:55:54,436 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-01 06:55:54,436 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-01 06:55:54,437 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-01 06:55:54,437 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-01 06:55:54,437 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-01 06:55:54,438 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-01 06:55:54,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 06:55:54,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-01 06:55:54,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-01 06:55:54,439 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-01 06:55:54,440 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-01 06:55:54,440 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-01 06:55:54,440 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-01 06:55:54,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-01 06:55:54,441 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-01 06:55:54,441 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-01 06:55:54,442 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-11-01 06:55:54,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-01 06:55:54,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-01 06:55:54,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-01 06:55:54,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-01 06:55:54,823 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-01 06:55:54,823 INFO L274 PluginConnector]: CDTParser initialized [2024-11-01 06:55:54,825 INFO L431 ainManager$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 [2024-11-01 06:55:56,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-01 06:55:56,914 INFO L384 CDTParser]: Found 1 translation units. [2024-11-01 06:55:56,915 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 [2024-11-01 06:55:56,962 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19cf8993/4f906c5b84cc432abf3dc1dc62e411c2/FLAG4e9d35c25 [2024-11-01 06:55:57,068 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19cf8993/4f906c5b84cc432abf3dc1dc62e411c2 [2024-11-01 06:55:57,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-01 06:55:57,073 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-01 06:55:57,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-01 06:55:57,076 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-01 06:55:57,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-01 06:55:57,082 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 06:55:57" (1/1) ... [2024-11-01 06:55:57,083 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182298a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:57, skipping insertion in model container [2024-11-01 06:55:57,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 06:55:57" (1/1) ... [2024-11-01 06:55:57,201 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-01 06:55:58,036 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-01 06:55:58,036 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-01 06:55:58,037 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-01 06:55:58,037 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-01 06:55:58,049 WARN L251 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] [2024-11-01 06:55:58,090 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-01 06:55:58,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 06:55:58,118 INFO L200 MainTranslator]: Completed pre-run [2024-11-01 06:55:58,303 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] [2024-11-01 06:55:58,306 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] [2024-11-01 06:55:58,307 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] [2024-11-01 06:55:58,307 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] [2024-11-01 06:55:58,307 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] [2024-11-01 06:55:58,321 WARN L251 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] [2024-11-01 06:55:58,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-01 06:55:58,408 INFO L204 MainTranslator]: Completed translation [2024-11-01 06:55:58,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58 WrapperNode [2024-11-01 06:55:58,409 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-01 06:55:58,410 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-01 06:55:58,411 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-01 06:55:58,411 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-01 06:55:58,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,495 INFO L138 Inliner]: procedures = 72, calls = 171, calls flagged for inlining = 23, calls inlined = 16, statements flattened = 353 [2024-11-01 06:55:58,496 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-01 06:55:58,497 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-01 06:55:58,497 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-01 06:55:58,497 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-01 06:55:58,510 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,523 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,565 INFO L175 MemorySlicer]: Split 100 memory accesses to 7 slices as follows [2, 3, 9, 78, 1, 3, 4]. 78 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 0, 4, 0, 0, 3, 0]. The 81 writes are split as follows [0, 0, 0, 78, 1, 0, 2]. [2024-11-01 06:55:58,565 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,601 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,608 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,623 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-01 06:55:58,636 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-01 06:55:58,636 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-01 06:55:58,636 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-01 06:55:58,637 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (1/1) ... [2024-11-01 06:55:58,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-01 06:55:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-01 06:55:58,665 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) [2024-11-01 06:55:58,667 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 [2024-11-01 06:55:58,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-01 06:55:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-01 06:55:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-01 06:55:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-01 06:55:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-01 06:55:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-11-01 06:55:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2024-11-01 06:55:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#5 [2024-11-01 06:55:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#6 [2024-11-01 06:55:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2024-11-01 06:55:58,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2024-11-01 06:55:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-01 06:55:58,686 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-01 06:55:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-01 06:55:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-01 06:55:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-01 06:55:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-01 06:55:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-01 06:55:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-01 06:55:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-01 06:55:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2024-11-01 06:55:58,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2024-11-01 06:55:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-01 06:55:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-01 06:55:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-01 06:55:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-01 06:55:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-01 06:55:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-01 06:55:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-11-01 06:55:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-11-01 06:55:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-01 06:55:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-01 06:55:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-01 06:55:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-01 06:55:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2024-11-01 06:55:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#5 [2024-11-01 06:55:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#6 [2024-11-01 06:55:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-01 06:55:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-11-01 06:55:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2024-11-01 06:55:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2024-11-01 06:55:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#4 [2024-11-01 06:55:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#5 [2024-11-01 06:55:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#6 [2024-11-01 06:55:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2024-11-01 06:55:58,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2024-11-01 06:55:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2024-11-01 06:55:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2024-11-01 06:55:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2024-11-01 06:55:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#3 [2024-11-01 06:55:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#4 [2024-11-01 06:55:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#5 [2024-11-01 06:55:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#6 [2024-11-01 06:55:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2024-11-01 06:55:58,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2024-11-01 06:55:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-01 06:55:58,691 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-01 06:55:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-01 06:55:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-01 06:55:58,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-01 06:55:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2024-11-01 06:55:58,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2024-11-01 06:55:59,002 INFO L238 CfgBuilder]: Building ICFG [2024-11-01 06:55:59,005 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-01 06:55:59,030 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2024-11-01 06:56:08,191 INFO L? ?]: Removed 130 outVars from TransFormulas that were not future-live. [2024-11-01 06:56:08,191 INFO L287 CfgBuilder]: Performing block encoding [2024-11-01 06:56:08,206 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-01 06:56:08,207 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-01 06:56:08,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 06:56:08 BoogieIcfgContainer [2024-11-01 06:56:08,207 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-01 06:56:08,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-01 06:56:08,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-01 06:56:08,214 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-01 06:56:08,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.11 06:55:57" (1/3) ... [2024-11-01 06:56:08,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16182e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 06:56:08, skipping insertion in model container [2024-11-01 06:56:08,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 06:55:58" (2/3) ... [2024-11-01 06:56:08,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16182e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 06:56:08, skipping insertion in model container [2024-11-01 06:56:08,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 06:56:08" (3/3) ... [2024-11-01 06:56:08,217 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2024-11-01 06:56:08,233 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-01 06:56:08,233 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-01 06:56:08,285 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-01 06:56:08,291 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;@6e64ceb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-01 06:56:08,291 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-01 06:56:08,295 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) [2024-11-01 06:56:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-01 06:56:08,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 06:56:08,303 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] [2024-11-01 06:56:08,303 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 06:56:08,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 06:56:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1136517471, now seen corresponding path program 1 times [2024-11-01 06:56:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 06:56:08,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491627911] [2024-11-01 06:56:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 06:56:08,318 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 06:56:08,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 06:56:08,321 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) [2024-11-01 06:56:08,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-01 06:56:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 06:56:09,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-01 06:56:09,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 06:56:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-01 06:56:09,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 06:56:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-01 06:56:11,394 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 06:56:11,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491627911] [2024-11-01 06:56:11,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491627911] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 06:56:11,395 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 06:56:11,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-01 06:56:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727441866] [2024-11-01 06:56:11,397 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 06:56:11,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-01 06:56:11,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 06:56:11,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-01 06:56:11,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-01 06:56:11,425 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) [2024-11-01 06:56:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 06:56:11,447 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2024-11-01 06:56:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-01 06:56:11,448 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 [2024-11-01 06:56:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 06:56:11,453 INFO L225 Difference]: With dead ends: 179 [2024-11-01 06:56:11,453 INFO L226 Difference]: Without dead ends: 82 [2024-11-01 06:56:11,455 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 [2024-11-01 06:56:11,458 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 [2024-11-01 06:56:11,458 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] [2024-11-01 06:56:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-01 06:56:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-01 06:56:11,485 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) [2024-11-01 06:56:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2024-11-01 06:56:11,489 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 61 [2024-11-01 06:56:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 06:56:11,489 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2024-11-01 06:56:11,489 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) [2024-11-01 06:56:11,490 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2024-11-01 06:56:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-01 06:56:11,492 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 06:56:11,493 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] [2024-11-01 06:56:11,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-11-01 06:56:11,694 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 [2024-11-01 06:56:11,695 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 06:56:11,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 06:56:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash 433386269, now seen corresponding path program 1 times [2024-11-01 06:56:11,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 06:56:11,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452164438] [2024-11-01 06:56:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 06:56:11,696 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 06:56:11,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 06:56:11,698 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) [2024-11-01 06:56:11,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-01 06:56:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 06:56:12,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 06:56:12,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 06:56:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-01 06:56:18,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 06:56:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-01 06:56:22,610 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 06:56:22,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452164438] [2024-11-01 06:56:22,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [452164438] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 06:56:22,610 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 06:56:22,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2024-11-01 06:56:22,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445896677] [2024-11-01 06:56:22,611 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 06:56:22,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-01 06:56:22,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 06:56:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-01 06:56:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-01 06:56:22,613 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) [2024-11-01 06:56:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 06:56:22,964 INFO L93 Difference]: Finished difference Result 184 states and 248 transitions. [2024-11-01 06:56:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-01 06:56:22,964 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 [2024-11-01 06:56:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 06:56:22,966 INFO L225 Difference]: With dead ends: 184 [2024-11-01 06:56:22,966 INFO L226 Difference]: Without dead ends: 128 [2024-11-01 06:56:22,967 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 [2024-11-01 06:56:22,968 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2024-11-01 06:56:22,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 170 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-01 06:56:22,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-01 06:56:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2024-11-01 06:56:22,985 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) [2024-11-01 06:56:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2024-11-01 06:56:22,991 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 61 [2024-11-01 06:56:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 06:56:22,992 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2024-11-01 06:56:22,992 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) [2024-11-01 06:56:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2024-11-01 06:56:22,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-01 06:56:22,999 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 06:56:22,999 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] [2024-11-01 06:56:23,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-01 06:56:23,199 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 [2024-11-01 06:56:23,200 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 06:56:23,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 06:56:23,201 INFO L85 PathProgramCache]: Analyzing trace with hash 124332871, now seen corresponding path program 1 times [2024-11-01 06:56:23,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 06:56:23,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717528754] [2024-11-01 06:56:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 06:56:23,202 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 06:56:23,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 06:56:23,203 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) [2024-11-01 06:56:23,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-01 06:56:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 06:56:24,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 06:56:24,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 06:56:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-01 06:56:24,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 06:56:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-01 06:56:27,349 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 06:56:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717528754] [2024-11-01 06:56:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717528754] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 06:56:27,350 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 06:56:27,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-11-01 06:56:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321749281] [2024-11-01 06:56:27,350 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 06:56:27,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-01 06:56:27,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 06:56:27,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-01 06:56:27,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-01 06:56:27,353 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) [2024-11-01 06:56:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 06:56:27,744 INFO L93 Difference]: Finished difference Result 261 states and 357 transitions. [2024-11-01 06:56:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-01 06:56:27,745 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 [2024-11-01 06:56:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 06:56:27,747 INFO L225 Difference]: With dead ends: 261 [2024-11-01 06:56:27,747 INFO L226 Difference]: Without dead ends: 166 [2024-11-01 06:56:27,748 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 [2024-11-01 06:56:27,749 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 60 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-11-01 06:56:27,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 179 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-01 06:56:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-01 06:56:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2024-11-01 06:56:27,761 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) [2024-11-01 06:56:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 216 transitions. [2024-11-01 06:56:27,763 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 216 transitions. Word has length 70 [2024-11-01 06:56:27,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 06:56:27,763 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 216 transitions. [2024-11-01 06:56:27,763 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) [2024-11-01 06:56:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 216 transitions. [2024-11-01 06:56:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-01 06:56:27,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 06:56:27,766 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] [2024-11-01 06:56:27,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2024-11-01 06:56:27,966 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 [2024-11-01 06:56:27,967 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 06:56:27,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 06:56:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1221872481, now seen corresponding path program 1 times [2024-11-01 06:56:27,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 06:56:27,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614747873] [2024-11-01 06:56:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 06:56:27,968 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 06:56:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 06:56:27,971 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) [2024-11-01 06:56:27,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-01 06:56:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 06:56:29,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-01 06:56:29,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 06:56:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-01 06:56:30,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 06:56:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-01 06:56:34,141 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 06:56:34,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614747873] [2024-11-01 06:56:34,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1614747873] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-01 06:56:34,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-01 06:56:34,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-01 06:56:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003064380] [2024-11-01 06:56:34,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-01 06:56:34,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 06:56:34,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 06:56:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 06:56:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-01 06:56:34,144 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) [2024-11-01 06:56:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 06:56:34,687 INFO L93 Difference]: Finished difference Result 300 states and 414 transitions. [2024-11-01 06:56:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-01 06:56:34,688 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 [2024-11-01 06:56:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 06:56:34,690 INFO L225 Difference]: With dead ends: 300 [2024-11-01 06:56:34,690 INFO L226 Difference]: Without dead ends: 160 [2024-11-01 06:56:34,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-01 06:56:34,691 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, 0.5s IncrementalHoareTripleChecker+Time [2024-11-01 06:56:34,692 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 303 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-01 06:56:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-01 06:56:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-11-01 06:56:34,706 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) [2024-11-01 06:56:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2024-11-01 06:56:34,707 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 81 [2024-11-01 06:56:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 06:56:34,707 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2024-11-01 06:56:34,708 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) [2024-11-01 06:56:34,708 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2024-11-01 06:56:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-01 06:56:34,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 06:56:34,709 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] [2024-11-01 06:56:34,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-01 06:56:34,910 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 [2024-11-01 06:56:34,910 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 06:56:34,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 06:56:34,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1173369075, now seen corresponding path program 1 times [2024-11-01 06:56:34,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 06:56:34,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294532486] [2024-11-01 06:56:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 06:56:34,911 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 06:56:34,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 06:56:34,913 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) [2024-11-01 06:56:34,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-01 06:56:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 06:56:36,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-01 06:56:36,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 06:56:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-01 06:56:38,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 06:56:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-01 06:56:43,182 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 06:56:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294532486] [2024-11-01 06:56:43,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [294532486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-01 06:56:43,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-01 06:56:43,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-01 06:56:43,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990706236] [2024-11-01 06:56:43,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-01 06:56:43,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-01 06:56:43,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 06:56:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-01 06:56:43,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-01 06:56:43,184 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) [2024-11-01 06:56:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 06:56:45,494 INFO L93 Difference]: Finished difference Result 307 states and 424 transitions. [2024-11-01 06:56:45,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-01 06:56:45,495 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 [2024-11-01 06:56:45,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 06:56:45,497 INFO L225 Difference]: With dead ends: 307 [2024-11-01 06:56:45,497 INFO L226 Difference]: Without dead ends: 163 [2024-11-01 06:56:45,500 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 [2024-11-01 06:56:45,501 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 0 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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 [2024-11-01 06:56:45,501 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] [2024-11-01 06:56:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-01 06:56:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2024-11-01 06:56:45,515 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) [2024-11-01 06:56:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 220 transitions. [2024-11-01 06:56:45,516 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 220 transitions. Word has length 83 [2024-11-01 06:56:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 06:56:45,517 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 220 transitions. [2024-11-01 06:56:45,517 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) [2024-11-01 06:56:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 220 transitions. [2024-11-01 06:56:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-01 06:56:45,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 06:56:45,519 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] [2024-11-01 06:56:45,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2024-11-01 06:56:45,719 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 [2024-11-01 06:56:45,720 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 06:56:45,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 06:56:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash -691684449, now seen corresponding path program 2 times [2024-11-01 06:56:45,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 06:56:45,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355873870] [2024-11-01 06:56:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 06:56:45,721 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 06:56:45,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 06:56:45,724 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) [2024-11-01 06:56:45,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-01 06:56:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 06:56:47,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-01 06:56:47,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 06:56:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-01 06:56:48,739 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 06:56:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-01 06:56:51,472 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 06:56:51,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355873870] [2024-11-01 06:56:51,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355873870] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 06:56:51,472 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 06:56:51,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2024-11-01 06:56:51,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179857266] [2024-11-01 06:56:51,472 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 06:56:51,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-01 06:56:51,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 06:56:51,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-01 06:56:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-01 06:56:51,473 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) [2024-11-01 06:56:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 06:56:52,404 INFO L93 Difference]: Finished difference Result 295 states and 407 transitions. [2024-11-01 06:56:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-01 06:56:52,405 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 [2024-11-01 06:56:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 06:56:52,407 INFO L225 Difference]: With dead ends: 295 [2024-11-01 06:56:52,408 INFO L226 Difference]: Without dead ends: 166 [2024-11-01 06:56:52,408 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 [2024-11-01 06:56:52,409 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 [2024-11-01 06:56:52,413 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] [2024-11-01 06:56:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-01 06:56:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2024-11-01 06:56:52,432 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) [2024-11-01 06:56:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 222 transitions. [2024-11-01 06:56:52,434 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 222 transitions. Word has length 89 [2024-11-01 06:56:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 06:56:52,434 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 222 transitions. [2024-11-01 06:56:52,434 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) [2024-11-01 06:56:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 222 transitions. [2024-11-01 06:56:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-01 06:56:52,436 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 06:56:52,437 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] [2024-11-01 06:56:52,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2024-11-01 06:56:52,637 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 [2024-11-01 06:56:52,638 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 06:56:52,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 06:56:52,638 INFO L85 PathProgramCache]: Analyzing trace with hash -11626079, now seen corresponding path program 1 times [2024-11-01 06:56:52,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 06:56:52,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417744197] [2024-11-01 06:56:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 06:56:52,639 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 06:56:52,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 06:56:52,642 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) [2024-11-01 06:56:52,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-01 06:56:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 06:56:53,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-01 06:56:53,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 06:56:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-01 06:56:54,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 06:56:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-01 06:56:56,742 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 06:56:56,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417744197] [2024-11-01 06:56:56,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [417744197] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 06:56:56,743 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 06:56:56,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-01 06:56:56,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644887443] [2024-11-01 06:56:56,743 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 06:56:56,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-01 06:56:56,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 06:56:56,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-01 06:56:56,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 06:56:56,744 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) [2024-11-01 06:56:57,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 06:56:57,056 INFO L93 Difference]: Finished difference Result 291 states and 400 transitions. [2024-11-01 06:56:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-01 06:56:57,058 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 [2024-11-01 06:56:57,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 06:56:57,060 INFO L225 Difference]: With dead ends: 291 [2024-11-01 06:56:57,060 INFO L226 Difference]: Without dead ends: 159 [2024-11-01 06:56:57,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-01 06:56:57,061 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 [2024-11-01 06:56:57,065 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] [2024-11-01 06:56:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-01 06:56:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2024-11-01 06:56:57,073 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) [2024-11-01 06:56:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 213 transitions. [2024-11-01 06:56:57,074 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 213 transitions. Word has length 89 [2024-11-01 06:56:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 06:56:57,075 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 213 transitions. [2024-11-01 06:56:57,075 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) [2024-11-01 06:56:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 213 transitions. [2024-11-01 06:56:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-01 06:56:57,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 06:56:57,076 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] [2024-11-01 06:56:57,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-11-01 06:56:57,276 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 [2024-11-01 06:56:57,277 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 06:56:57,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 06:56:57,278 INFO L85 PathProgramCache]: Analyzing trace with hash -83424347, now seen corresponding path program 1 times [2024-11-01 06:56:57,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 06:56:57,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187045345] [2024-11-01 06:56:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 06:56:57,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 06:56:57,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 06:56:57,279 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) [2024-11-01 06:56:57,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2024-11-01 06:56:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 06:56:58,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-01 06:56:58,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 06:57:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-01 06:57:07,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 06:57:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-01 06:57:15,127 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 06:57:15,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187045345] [2024-11-01 06:57:15,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1187045345] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 06:57:15,127 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 06:57:15,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2024-11-01 06:57:15,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117316335] [2024-11-01 06:57:15,127 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 06:57:15,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-01 06:57:15,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 06:57:15,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-01 06:57:15,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-01 06:57:15,129 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) [2024-11-01 06:57:19,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-01 06:57:23,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-01 06:57:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-01 06:57:29,031 INFO L93 Difference]: Finished difference Result 496 states and 690 transitions. [2024-11-01 06:57:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-01 06:57:29,032 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 [2024-11-01 06:57:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-01 06:57:29,036 INFO L225 Difference]: With dead ends: 496 [2024-11-01 06:57:29,036 INFO L226 Difference]: Without dead ends: 488 [2024-11-01 06:57:29,037 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-01 06:57:29,037 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 427 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s 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, 13.0s IncrementalHoareTripleChecker+Time [2024-11-01 06:57:29,037 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 434 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 13.0s Time] [2024-11-01 06:57:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2024-11-01 06:57:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 303. [2024-11-01 06:57:29,054 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) [2024-11-01 06:57:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 420 transitions. [2024-11-01 06:57:29,056 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 420 transitions. Word has length 91 [2024-11-01 06:57:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-01 06:57:29,056 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 420 transitions. [2024-11-01 06:57:29,056 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) [2024-11-01 06:57:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 420 transitions. [2024-11-01 06:57:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-01 06:57:29,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-01 06:57:29,058 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] [2024-11-01 06:57:29,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2024-11-01 06:57:29,258 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 [2024-11-01 06:57:29,259 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-01 06:57:29,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-01 06:57:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash 709073474, now seen corresponding path program 1 times [2024-11-01 06:57:29,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-01 06:57:29,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684349073] [2024-11-01 06:57:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-01 06:57:29,260 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-01 06:57:29,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-01 06:57:29,261 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) [2024-11-01 06:57:29,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-01 06:57:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-01 06:57:30,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-01 06:57:30,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-01 06:57:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-01 06:57:31,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-01 06:57:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-01 06:57:36,083 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-01 06:57:36,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684349073] [2024-11-01 06:57:36,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1684349073] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-01 06:57:36,083 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-01 06:57:36,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2024-11-01 06:57:36,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737111193] [2024-11-01 06:57:36,084 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-01 06:57:36,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-01 06:57:36,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-01 06:57:36,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-01 06:57:36,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-01 06:57:36,085 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)