/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 18:07:41,494 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 18:07:41,560 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 18:07:41,563 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 18:07:41,563 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 18:07:41,585 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 18:07:41,586 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 18:07:41,586 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 18:07:41,587 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 18:07:41,590 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 18:07:41,590 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 18:07:41,590 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 18:07:41,590 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 18:07:41,591 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 18:07:41,591 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 18:07:41,591 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 18:07:41,592 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 18:07:41,592 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 18:07:41,593 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 18:07:41,593 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 18:07:41,593 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 18:07:41,593 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 18:07:41,593 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 18:07:41,593 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 18:07:41,594 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 18:07:41,594 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 18:07:41,594 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 18:07:41,594 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 18:07:41,594 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 18:07:41,595 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 18:07:41,595 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 18:07:41,595 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 18:07:41,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 18:07:41,596 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 18:07:41,596 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 18:07:41,596 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 18:07:41,596 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 18:07:41,596 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 18:07:41,596 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 18:07:41,596 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 18:07:41,596 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 18:07:41,597 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 18:07:41,597 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 18:07:41,597 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 18:07:41,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 18:07:41,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 18:07:41,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 18:07:41,814 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 18:07:41,815 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 18:07:41,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c [2023-12-15 18:07:42,836 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 18:07:43,011 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 18:07:43,011 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c [2023-12-15 18:07:43,030 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901cca679/d5394465078340ef8789a0af4b66880a/FLAG72dfcea23 [2023-12-15 18:07:43,040 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901cca679/d5394465078340ef8789a0af4b66880a [2023-12-15 18:07:43,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 18:07:43,043 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 18:07:43,044 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 18:07:43,044 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 18:07:43,047 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 18:07:43,048 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,048 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6da57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43, skipping insertion in model container [2023-12-15 18:07:43,049 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,110 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 18:07:43,243 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[914,927] [2023-12-15 18:07:43,295 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[7115,7128] [2023-12-15 18:07:43,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 18:07:43,443 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 18:07:43,452 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[914,927] [2023-12-15 18:07:43,470 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[7115,7128] [2023-12-15 18:07:43,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 18:07:43,543 INFO L206 MainTranslator]: Completed translation [2023-12-15 18:07:43,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43 WrapperNode [2023-12-15 18:07:43,544 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 18:07:43,545 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 18:07:43,545 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 18:07:43,545 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 18:07:43,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,560 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,600 INFO L138 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1132 [2023-12-15 18:07:43,600 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 18:07:43,601 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 18:07:43,601 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 18:07:43,601 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 18:07:43,614 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,630 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 18:07:43,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,630 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,640 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,648 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,653 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,657 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 18:07:43,658 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 18:07:43,658 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 18:07:43,658 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 18:07:43,658 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (1/1) ... [2023-12-15 18:07:43,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 18:07:43,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:07:43,713 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) [2023-12-15 18:07:43,760 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 [2023-12-15 18:07:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 18:07:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-15 18:07:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-15 18:07:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-15 18:07:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-15 18:07:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-15 18:07:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-15 18:07:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-15 18:07:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-15 18:07:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-15 18:07:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-15 18:07:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-15 18:07:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-15 18:07:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-15 18:07:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-15 18:07:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-15 18:07:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-15 18:07:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-15 18:07:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-15 18:07:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-15 18:07:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-15 18:07:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-15 18:07:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-15 18:07:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 18:07:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-15 18:07:43,769 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-15 18:07:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-15 18:07:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-15 18:07:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 18:07:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 18:07:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-15 18:07:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-15 18:07:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-12-15 18:07:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-12-15 18:07:43,919 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 18:07:43,921 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 18:07:44,565 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 18:07:44,624 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 18:07:44,624 INFO L309 CfgBuilder]: Removed 20 assume(true) statements. [2023-12-15 18:07:44,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 06:07:44 BoogieIcfgContainer [2023-12-15 18:07:44,625 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 18:07:44,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 18:07:44,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 18:07:44,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 18:07:44,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 06:07:43" (1/3) ... [2023-12-15 18:07:44,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba437a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 06:07:44, skipping insertion in model container [2023-12-15 18:07:44,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 06:07:43" (2/3) ... [2023-12-15 18:07:44,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba437a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 06:07:44, skipping insertion in model container [2023-12-15 18:07:44,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 06:07:44" (3/3) ... [2023-12-15 18:07:44,630 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.15.cil.c [2023-12-15 18:07:44,641 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 18:07:44,641 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-15 18:07:44,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 18:07:44,681 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7e1a0153, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 18:07:44,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-15 18:07:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 407 states have (on average 1.71990171990172) internal successors, (700), 415 states have internal predecessors, (700), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2023-12-15 18:07:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-15 18:07:44,694 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:44,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:44,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:44,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:44,699 INFO L85 PathProgramCache]: Analyzing trace with hash 245491008, now seen corresponding path program 1 times [2023-12-15 18:07:44,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:44,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793051383] [2023-12-15 18:07:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:44,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:45,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:45,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:45,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:45,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:45,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:45,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:45,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:45,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793051383] [2023-12-15 18:07:45,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793051383] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:07:45,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:07:45,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-15 18:07:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001538974] [2023-12-15 18:07:45,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:07:45,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 18:07:45,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 18:07:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-15 18:07:45,124 INFO L87 Difference]: Start difference. First operand has 468 states, 407 states have (on average 1.71990171990172) internal successors, (700), 415 states have internal predecessors, (700), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-15 18:07:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:07:46,235 INFO L93 Difference]: Finished difference Result 1034 states and 1721 transitions. [2023-12-15 18:07:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 18:07:46,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2023-12-15 18:07:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:07:46,248 INFO L225 Difference]: With dead ends: 1034 [2023-12-15 18:07:46,248 INFO L226 Difference]: Without dead ends: 587 [2023-12-15 18:07:46,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-12-15 18:07:46,254 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 1559 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 18:07:46,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1564 Valid, 1599 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-15 18:07:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2023-12-15 18:07:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 550. [2023-12-15 18:07:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 472 states have (on average 1.5889830508474576) internal successors, (750), 479 states have internal predecessors, (750), 54 states have call successors, (54), 22 states have call predecessors, (54), 22 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2023-12-15 18:07:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 859 transitions. [2023-12-15 18:07:46,322 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 859 transitions. Word has length 58 [2023-12-15 18:07:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:07:46,323 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 859 transitions. [2023-12-15 18:07:46,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-15 18:07:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 859 transitions. [2023-12-15 18:07:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-15 18:07:46,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:46,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:46,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 18:07:46,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:46,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash -845671039, now seen corresponding path program 1 times [2023-12-15 18:07:46,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:46,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101441099] [2023-12-15 18:07:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:46,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:46,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:46,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:46,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:46,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:46,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:46,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:46,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:46,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101441099] [2023-12-15 18:07:46,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101441099] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:07:46,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:07:46,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-15 18:07:46,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640737821] [2023-12-15 18:07:46,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:07:46,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 18:07:46,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:46,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 18:07:46,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-15 18:07:46,442 INFO L87 Difference]: Start difference. First operand 550 states and 859 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-15 18:07:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:07:47,654 INFO L93 Difference]: Finished difference Result 746 states and 1135 transitions. [2023-12-15 18:07:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 18:07:47,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2023-12-15 18:07:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:07:47,658 INFO L225 Difference]: With dead ends: 746 [2023-12-15 18:07:47,658 INFO L226 Difference]: Without dead ends: 584 [2023-12-15 18:07:47,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-15 18:07:47,660 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 979 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 2301 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-15 18:07:47,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 2301 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-15 18:07:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-12-15 18:07:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 554. [2023-12-15 18:07:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 475 states have (on average 1.583157894736842) internal successors, (752), 482 states have internal predecessors, (752), 54 states have call successors, (54), 22 states have call predecessors, (54), 23 states have return successors, (56), 52 states have call predecessors, (56), 50 states have call successors, (56) [2023-12-15 18:07:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 862 transitions. [2023-12-15 18:07:47,688 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 862 transitions. Word has length 58 [2023-12-15 18:07:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:07:47,689 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 862 transitions. [2023-12-15 18:07:47,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-15 18:07:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 862 transitions. [2023-12-15 18:07:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-15 18:07:47,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:47,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:47,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 18:07:47,691 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:47,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:47,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1205312959, now seen corresponding path program 1 times [2023-12-15 18:07:47,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:47,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636511608] [2023-12-15 18:07:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:47,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:47,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:47,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:47,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:47,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:47,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:47,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:47,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:47,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:47,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636511608] [2023-12-15 18:07:47,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636511608] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:07:47,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:07:47,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-15 18:07:47,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911833293] [2023-12-15 18:07:47,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:07:47,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-15 18:07:47,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-15 18:07:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-12-15 18:07:47,805 INFO L87 Difference]: Start difference. First operand 554 states and 862 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-15 18:07:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:07:49,561 INFO L93 Difference]: Finished difference Result 1387 states and 2014 transitions. [2023-12-15 18:07:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-15 18:07:49,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 58 [2023-12-15 18:07:49,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:07:49,566 INFO L225 Difference]: With dead ends: 1387 [2023-12-15 18:07:49,566 INFO L226 Difference]: Without dead ends: 1209 [2023-12-15 18:07:49,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2023-12-15 18:07:49,568 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 3624 mSDsluCounter, 1957 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3640 SdHoareTripleChecker+Valid, 2384 SdHoareTripleChecker+Invalid, 2659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-15 18:07:49,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3640 Valid, 2384 Invalid, 2659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-15 18:07:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2023-12-15 18:07:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1092. [2023-12-15 18:07:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 894 states have (on average 1.4798657718120805) internal successors, (1323), 909 states have internal predecessors, (1323), 111 states have call successors, (111), 75 states have call predecessors, (111), 85 states have return successors, (125), 109 states have call predecessors, (125), 107 states have call successors, (125) [2023-12-15 18:07:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1559 transitions. [2023-12-15 18:07:49,604 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1559 transitions. Word has length 58 [2023-12-15 18:07:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:07:49,604 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1559 transitions. [2023-12-15 18:07:49,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-15 18:07:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1559 transitions. [2023-12-15 18:07:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-15 18:07:49,605 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:49,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:49,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 18:07:49,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:49,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash -826618611, now seen corresponding path program 1 times [2023-12-15 18:07:49,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:49,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117671641] [2023-12-15 18:07:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:49,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:49,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:49,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:49,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:49,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:49,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:49,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:49,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117671641] [2023-12-15 18:07:49,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117671641] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:07:49,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:07:49,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-15 18:07:49,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23799358] [2023-12-15 18:07:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:07:49,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 18:07:49,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 18:07:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-15 18:07:49,694 INFO L87 Difference]: Start difference. First operand 1092 states and 1559 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-15 18:07:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:07:50,803 INFO L93 Difference]: Finished difference Result 1906 states and 2635 transitions. [2023-12-15 18:07:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 18:07:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 59 [2023-12-15 18:07:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:07:50,808 INFO L225 Difference]: With dead ends: 1906 [2023-12-15 18:07:50,808 INFO L226 Difference]: Without dead ends: 1196 [2023-12-15 18:07:50,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-12-15 18:07:50,810 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 659 mSDsluCounter, 2218 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 2593 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-15 18:07:50,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 2593 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-15 18:07:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2023-12-15 18:07:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1108. [2023-12-15 18:07:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 906 states have (on average 1.467991169977925) internal successors, (1330), 921 states have internal predecessors, (1330), 111 states have call successors, (111), 75 states have call predecessors, (111), 89 states have return successors, (129), 113 states have call predecessors, (129), 107 states have call successors, (129) [2023-12-15 18:07:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1570 transitions. [2023-12-15 18:07:50,881 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1570 transitions. Word has length 59 [2023-12-15 18:07:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:07:50,882 INFO L495 AbstractCegarLoop]: Abstraction has 1108 states and 1570 transitions. [2023-12-15 18:07:50,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-15 18:07:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1570 transitions. [2023-12-15 18:07:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-15 18:07:50,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:50,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:50,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-15 18:07:50,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:50,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:50,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1096609423, now seen corresponding path program 1 times [2023-12-15 18:07:50,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:50,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70404410] [2023-12-15 18:07:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:50,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:50,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:51,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:51,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:51,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:51,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:51,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:51,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:51,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70404410] [2023-12-15 18:07:51,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70404410] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:07:51,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:07:51,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-15 18:07:51,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493789019] [2023-12-15 18:07:51,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:07:51,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 18:07:51,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:51,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 18:07:51,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-15 18:07:51,036 INFO L87 Difference]: Start difference. First operand 1108 states and 1570 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-15 18:07:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:07:52,223 INFO L93 Difference]: Finished difference Result 2548 states and 3389 transitions. [2023-12-15 18:07:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 18:07:52,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2023-12-15 18:07:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:07:52,230 INFO L225 Difference]: With dead ends: 2548 [2023-12-15 18:07:52,230 INFO L226 Difference]: Without dead ends: 1823 [2023-12-15 18:07:52,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-12-15 18:07:52,234 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 1791 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1821 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-15 18:07:52,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1821 Valid, 1593 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-15 18:07:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2023-12-15 18:07:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1521. [2023-12-15 18:07:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1224 states have (on average 1.4248366013071896) internal successors, (1744), 1248 states have internal predecessors, (1744), 157 states have call successors, (157), 114 states have call predecessors, (157), 138 states have return successors, (201), 161 states have call predecessors, (201), 153 states have call successors, (201) [2023-12-15 18:07:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2102 transitions. [2023-12-15 18:07:52,310 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2102 transitions. Word has length 59 [2023-12-15 18:07:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:07:52,311 INFO L495 AbstractCegarLoop]: Abstraction has 1521 states and 2102 transitions. [2023-12-15 18:07:52,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-15 18:07:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2102 transitions. [2023-12-15 18:07:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-15 18:07:52,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:52,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:52,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-15 18:07:52,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:52,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1315464141, now seen corresponding path program 1 times [2023-12-15 18:07:52,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:52,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310530258] [2023-12-15 18:07:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:52,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:52,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:52,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:52,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:52,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:52,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:52,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:52,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:52,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:52,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310530258] [2023-12-15 18:07:52,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310530258] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:07:52,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:07:52,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:07:52,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534597324] [2023-12-15 18:07:52,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:07:52,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:07:52,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:52,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:07:52,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:07:52,393 INFO L87 Difference]: Start difference. First operand 1521 states and 2102 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-15 18:07:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:07:53,143 INFO L93 Difference]: Finished difference Result 3799 states and 5056 transitions. [2023-12-15 18:07:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 18:07:53,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2023-12-15 18:07:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:07:53,152 INFO L225 Difference]: With dead ends: 3799 [2023-12-15 18:07:53,152 INFO L226 Difference]: Without dead ends: 2663 [2023-12-15 18:07:53,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-12-15 18:07:53,157 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 1774 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1808 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:07:53,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1808 Valid, 1262 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 18:07:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2023-12-15 18:07:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2559. [2023-12-15 18:07:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1997 states have (on average 1.3525287931897847) internal successors, (2701), 2043 states have internal predecessors, (2701), 286 states have call successors, (286), 220 states have call predecessors, (286), 274 states have return successors, (415), 300 states have call predecessors, (415), 282 states have call successors, (415) [2023-12-15 18:07:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 3402 transitions. [2023-12-15 18:07:53,282 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 3402 transitions. Word has length 59 [2023-12-15 18:07:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:07:53,284 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 3402 transitions. [2023-12-15 18:07:53,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-15 18:07:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 3402 transitions. [2023-12-15 18:07:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-15 18:07:53,286 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:53,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:53,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-15 18:07:53,288 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:53,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:53,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1487855542, now seen corresponding path program 1 times [2023-12-15 18:07:53,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:53,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517886022] [2023-12-15 18:07:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:53,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:53,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:53,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:53,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:53,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:53,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:53,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:53,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517886022] [2023-12-15 18:07:53,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517886022] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:07:53,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:07:53,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 18:07:53,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373264874] [2023-12-15 18:07:53,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:07:53,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 18:07:53,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:53,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 18:07:53,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:07:53,368 INFO L87 Difference]: Start difference. First operand 2559 states and 3402 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-15 18:07:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:07:54,179 INFO L93 Difference]: Finished difference Result 5737 states and 7460 transitions. [2023-12-15 18:07:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 18:07:54,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-12-15 18:07:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:07:54,191 INFO L225 Difference]: With dead ends: 5737 [2023-12-15 18:07:54,192 INFO L226 Difference]: Without dead ends: 3570 [2023-12-15 18:07:54,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-12-15 18:07:54,196 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 830 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 18:07:54,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 1564 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 18:07:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2023-12-15 18:07:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 3324. [2023-12-15 18:07:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 2574 states have (on average 1.3302253302253302) internal successors, (3424), 2627 states have internal predecessors, (3424), 378 states have call successors, (378), 300 states have call predecessors, (378), 370 states have return successors, (533), 401 states have call predecessors, (533), 374 states have call successors, (533) [2023-12-15 18:07:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 4335 transitions. [2023-12-15 18:07:54,357 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 4335 transitions. Word has length 60 [2023-12-15 18:07:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:07:54,357 INFO L495 AbstractCegarLoop]: Abstraction has 3324 states and 4335 transitions. [2023-12-15 18:07:54,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-15 18:07:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 4335 transitions. [2023-12-15 18:07:54,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-15 18:07:54,359 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:54,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:54,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-15 18:07:54,359 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:54,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash 408858921, now seen corresponding path program 1 times [2023-12-15 18:07:54,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:54,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607397069] [2023-12-15 18:07:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:54,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:54,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:54,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:54,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:54,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:54,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:54,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:54,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:54,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:54,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607397069] [2023-12-15 18:07:54,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607397069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:07:54,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:07:54,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 18:07:54,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343798779] [2023-12-15 18:07:54,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:07:54,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 18:07:54,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 18:07:54,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:07:54,410 INFO L87 Difference]: Start difference. First operand 3324 states and 4335 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-15 18:07:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:07:55,183 INFO L93 Difference]: Finished difference Result 7017 states and 8991 transitions. [2023-12-15 18:07:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 18:07:55,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2023-12-15 18:07:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:07:55,195 INFO L225 Difference]: With dead ends: 7017 [2023-12-15 18:07:55,195 INFO L226 Difference]: Without dead ends: 4081 [2023-12-15 18:07:55,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-12-15 18:07:55,199 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 1391 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:07:55,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1426 Valid, 1328 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 18:07:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2023-12-15 18:07:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 3837. [2023-12-15 18:07:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 2971 states have (on average 1.319757657354426) internal successors, (3921), 3030 states have internal predecessors, (3921), 434 states have call successors, (434), 350 states have call predecessors, (434), 430 states have return successors, (610), 461 states have call predecessors, (610), 430 states have call successors, (610) [2023-12-15 18:07:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 4965 transitions. [2023-12-15 18:07:55,332 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 4965 transitions. Word has length 66 [2023-12-15 18:07:55,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:07:55,332 INFO L495 AbstractCegarLoop]: Abstraction has 3837 states and 4965 transitions. [2023-12-15 18:07:55,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-15 18:07:55,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 4965 transitions. [2023-12-15 18:07:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-15 18:07:55,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:55,334 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:55,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-15 18:07:55,334 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:55,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash -727308181, now seen corresponding path program 1 times [2023-12-15 18:07:55,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:55,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266926359] [2023-12-15 18:07:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:55,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:55,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:55,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:55,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:55,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:55,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:55,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:55,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:55,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:55,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266926359] [2023-12-15 18:07:55,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266926359] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:07:55,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:07:55,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:07:55,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90589398] [2023-12-15 18:07:55,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:07:55,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:07:55,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:07:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:07:55,404 INFO L87 Difference]: Start difference. First operand 3837 states and 4965 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-15 18:07:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:07:56,251 INFO L93 Difference]: Finished difference Result 4828 states and 6171 transitions. [2023-12-15 18:07:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 18:07:56,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 67 [2023-12-15 18:07:56,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:07:56,266 INFO L225 Difference]: With dead ends: 4828 [2023-12-15 18:07:56,266 INFO L226 Difference]: Without dead ends: 4825 [2023-12-15 18:07:56,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-12-15 18:07:56,269 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 2083 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:07:56,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2093 Valid, 1302 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 18:07:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2023-12-15 18:07:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4526. [2023-12-15 18:07:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4526 states, 3481 states have (on average 1.3068083883941397) internal successors, (4549), 3547 states have internal predecessors, (4549), 517 states have call successors, (517), 422 states have call predecessors, (517), 526 states have return successors, (738), 561 states have call predecessors, (738), 514 states have call successors, (738) [2023-12-15 18:07:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 5804 transitions. [2023-12-15 18:07:56,510 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 5804 transitions. Word has length 67 [2023-12-15 18:07:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:07:56,511 INFO L495 AbstractCegarLoop]: Abstraction has 4526 states and 5804 transitions. [2023-12-15 18:07:56,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-15 18:07:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 5804 transitions. [2023-12-15 18:07:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-15 18:07:56,514 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:56,514 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:56,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-15 18:07:56,515 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:56,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:56,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1073253965, now seen corresponding path program 1 times [2023-12-15 18:07:56,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:56,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407319992] [2023-12-15 18:07:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:56,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:56,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:56,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:56,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:56,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:56,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:56,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:56,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:56,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:56,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407319992] [2023-12-15 18:07:56,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407319992] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:07:56,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377077128] [2023-12-15 18:07:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:56,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:07:56,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:07:56,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 18:07:56,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 18:07:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:56,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 18:07:56,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:07:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:56,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 18:07:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:56,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377077128] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 18:07:56,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 18:07:56,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2023-12-15 18:07:56,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863148232] [2023-12-15 18:07:56,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 18:07:56,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-15 18:07:56,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:56,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-15 18:07:56,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-15 18:07:56,980 INFO L87 Difference]: Start difference. First operand 4526 states and 5804 transitions. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-15 18:07:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:07:58,734 INFO L93 Difference]: Finished difference Result 8678 states and 10927 transitions. [2023-12-15 18:07:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-15 18:07:58,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 68 [2023-12-15 18:07:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:07:58,759 INFO L225 Difference]: With dead ends: 8678 [2023-12-15 18:07:58,759 INFO L226 Difference]: Without dead ends: 8675 [2023-12-15 18:07:58,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2023-12-15 18:07:58,762 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 2245 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2312 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 2748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-15 18:07:58,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2312 Valid, 2191 Invalid, 2748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2504 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-15 18:07:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8675 states. [2023-12-15 18:07:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8675 to 7837. [2023-12-15 18:07:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7837 states, 6002 states have (on average 1.2877374208597134) internal successors, (7729), 6119 states have internal predecessors, (7729), 895 states have call successors, (895), 754 states have call predecessors, (895), 938 states have return successors, (1295), 968 states have call predecessors, (1295), 892 states have call successors, (1295) [2023-12-15 18:07:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7837 states to 7837 states and 9919 transitions. [2023-12-15 18:07:59,156 INFO L78 Accepts]: Start accepts. Automaton has 7837 states and 9919 transitions. Word has length 68 [2023-12-15 18:07:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:07:59,157 INFO L495 AbstractCegarLoop]: Abstraction has 7837 states and 9919 transitions. [2023-12-15 18:07:59,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-15 18:07:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 7837 states and 9919 transitions. [2023-12-15 18:07:59,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-15 18:07:59,158 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:07:59,158 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:07:59,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 18:07:59,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-15 18:07:59,363 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:07:59,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:07:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash 998274283, now seen corresponding path program 2 times [2023-12-15 18:07:59,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:07:59,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389286873] [2023-12-15 18:07:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:07:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:07:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:59,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:07:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:59,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:07:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:59,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:07:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:59,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:07:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:59,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:07:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:59,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:07:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:59,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:07:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:07:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:07:59,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:07:59,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389286873] [2023-12-15 18:07:59,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389286873] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:07:59,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:07:59,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 18:07:59,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464722126] [2023-12-15 18:07:59,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:07:59,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 18:07:59,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:07:59,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 18:07:59,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:07:59,411 INFO L87 Difference]: Start difference. First operand 7837 states and 9919 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-15 18:08:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:00,252 INFO L93 Difference]: Finished difference Result 10627 states and 13426 transitions. [2023-12-15 18:08:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 18:08:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 71 [2023-12-15 18:08:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:00,263 INFO L225 Difference]: With dead ends: 10627 [2023-12-15 18:08:00,263 INFO L226 Difference]: Without dead ends: 4415 [2023-12-15 18:08:00,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-15 18:08:00,272 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1329 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:00,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 1367 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 18:08:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4415 states. [2023-12-15 18:08:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4415 to 3420. [2023-12-15 18:08:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 2653 states have (on average 1.2977761025254428) internal successors, (3443), 2692 states have internal predecessors, (3443), 394 states have call successors, (394), 318 states have call predecessors, (394), 371 states have return successors, (519), 414 states have call predecessors, (519), 391 states have call successors, (519) [2023-12-15 18:08:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 4356 transitions. [2023-12-15 18:08:00,455 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 4356 transitions. Word has length 71 [2023-12-15 18:08:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:00,456 INFO L495 AbstractCegarLoop]: Abstraction has 3420 states and 4356 transitions. [2023-12-15 18:08:00,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-15 18:08:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 4356 transitions. [2023-12-15 18:08:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-15 18:08:00,457 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:00,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:00,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-15 18:08:00,457 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:00,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:00,458 INFO L85 PathProgramCache]: Analyzing trace with hash -905337230, now seen corresponding path program 1 times [2023-12-15 18:08:00,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:00,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472901570] [2023-12-15 18:08:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:00,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:00,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:00,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:08:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:00,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:08:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:00,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:08:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:00,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:08:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:00,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:08:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:00,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:08:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:00,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-15 18:08:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 18:08:00,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:00,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472901570] [2023-12-15 18:08:00,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472901570] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:00,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:00,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-15 18:08:00,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745583074] [2023-12-15 18:08:00,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:00,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 18:08:00,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:00,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 18:08:00,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-15 18:08:00,539 INFO L87 Difference]: Start difference. First operand 3420 states and 4356 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-15 18:08:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:01,818 INFO L93 Difference]: Finished difference Result 9498 states and 11849 transitions. [2023-12-15 18:08:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 18:08:01,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2023-12-15 18:08:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:01,835 INFO L225 Difference]: With dead ends: 9498 [2023-12-15 18:08:01,835 INFO L226 Difference]: Without dead ends: 5482 [2023-12-15 18:08:01,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-12-15 18:08:01,842 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 1472 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:01,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1484 Valid, 1673 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-15 18:08:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5482 states. [2023-12-15 18:08:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5482 to 5218. [2023-12-15 18:08:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 3978 states have (on average 1.256913021618904) internal successors, (5000), 4060 states have internal predecessors, (5000), 610 states have call successors, (610), 504 states have call predecessors, (610), 628 states have return successors, (903), 658 states have call predecessors, (903), 607 states have call successors, (903) [2023-12-15 18:08:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 6513 transitions. [2023-12-15 18:08:02,080 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 6513 transitions. Word has length 76 [2023-12-15 18:08:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:02,080 INFO L495 AbstractCegarLoop]: Abstraction has 5218 states and 6513 transitions. [2023-12-15 18:08:02,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-15 18:08:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 6513 transitions. [2023-12-15 18:08:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-15 18:08:02,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:02,082 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:02,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-15 18:08:02,082 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:02,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1890530074, now seen corresponding path program 1 times [2023-12-15 18:08:02,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:02,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834721301] [2023-12-15 18:08:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:02,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:02,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:02,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:08:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:02,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:08:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:02,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:08:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:02,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:08:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:02,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:08:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:02,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:08:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:02,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-15 18:08:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 18:08:02,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:02,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834721301] [2023-12-15 18:08:02,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834721301] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:02,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:02,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-15 18:08:02,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073438627] [2023-12-15 18:08:02,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:02,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 18:08:02,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:02,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 18:08:02,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-15 18:08:02,174 INFO L87 Difference]: Start difference. First operand 5218 states and 6513 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-15 18:08:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:03,606 INFO L93 Difference]: Finished difference Result 8573 states and 10579 transitions. [2023-12-15 18:08:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-15 18:08:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 86 [2023-12-15 18:08:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:03,615 INFO L225 Difference]: With dead ends: 8573 [2023-12-15 18:08:03,615 INFO L226 Difference]: Without dead ends: 4407 [2023-12-15 18:08:03,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2023-12-15 18:08:03,620 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 2359 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2399 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:03,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2399 Valid, 1971 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-15 18:08:03,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2023-12-15 18:08:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3993. [2023-12-15 18:08:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3039 states have (on average 1.2458045409674234) internal successors, (3786), 3104 states have internal predecessors, (3786), 467 states have call successors, (467), 379 states have call predecessors, (467), 485 states have return successors, (645), 514 states have call predecessors, (645), 464 states have call successors, (645) [2023-12-15 18:08:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 4898 transitions. [2023-12-15 18:08:03,793 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 4898 transitions. Word has length 86 [2023-12-15 18:08:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:03,793 INFO L495 AbstractCegarLoop]: Abstraction has 3993 states and 4898 transitions. [2023-12-15 18:08:03,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-15 18:08:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 4898 transitions. [2023-12-15 18:08:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-15 18:08:03,796 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:03,796 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:03,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-15 18:08:03,797 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:03,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash 582729720, now seen corresponding path program 1 times [2023-12-15 18:08:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:03,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636696245] [2023-12-15 18:08:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:03,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:08:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:08:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:08:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:08:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:08:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:08:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-15 18:08:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-15 18:08:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-12-15 18:08:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-12-15 18:08:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:08:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:08:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-12-15 18:08:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-12-15 18:08:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-12-15 18:08:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-15 18:08:03,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:03,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636696245] [2023-12-15 18:08:03,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636696245] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:08:03,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984901856] [2023-12-15 18:08:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:03,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:08:03,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:08:03,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 18:08:03,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 18:08:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-15 18:08:04,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:08:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 18:08:04,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:08:04,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984901856] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:04,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:08:04,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2023-12-15 18:08:04,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562164789] [2023-12-15 18:08:04,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:04,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 18:08:04,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 18:08:04,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-12-15 18:08:04,132 INFO L87 Difference]: Start difference. First operand 3993 states and 4898 transitions. Second operand has 6 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-15 18:08:04,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:04,372 INFO L93 Difference]: Finished difference Result 6023 states and 7347 transitions. [2023-12-15 18:08:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 18:08:04,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2023-12-15 18:08:04,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:04,377 INFO L225 Difference]: With dead ends: 6023 [2023-12-15 18:08:04,377 INFO L226 Difference]: Without dead ends: 2422 [2023-12-15 18:08:04,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-12-15 18:08:04,383 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 32 mSDsluCounter, 2676 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3354 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:04,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3354 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 18:08:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2023-12-15 18:08:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2267. [2023-12-15 18:08:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 1813 states have (on average 1.272476558190844) internal successors, (2307), 1832 states have internal predecessors, (2307), 229 states have call successors, (229), 173 states have call predecessors, (229), 223 states have return successors, (309), 262 states have call predecessors, (309), 226 states have call successors, (309) [2023-12-15 18:08:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2845 transitions. [2023-12-15 18:08:04,518 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2845 transitions. Word has length 131 [2023-12-15 18:08:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:04,518 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 2845 transitions. [2023-12-15 18:08:04,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-15 18:08:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2845 transitions. [2023-12-15 18:08:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-15 18:08:04,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:04,521 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:04,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 18:08:04,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-15 18:08:04,726 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:04,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash -232080284, now seen corresponding path program 1 times [2023-12-15 18:08:04,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:04,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584249879] [2023-12-15 18:08:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:04,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:08:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:08:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:08:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:08:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:08:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:08:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-15 18:08:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-12-15 18:08:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-12-15 18:08:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-12-15 18:08:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:08:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:08:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-12-15 18:08:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-12-15 18:08:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-12-15 18:08:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-15 18:08:04,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:04,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584249879] [2023-12-15 18:08:04,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584249879] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:04,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:04,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 18:08:04,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155067508] [2023-12-15 18:08:04,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:04,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 18:08:04,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:04,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 18:08:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-15 18:08:04,820 INFO L87 Difference]: Start difference. First operand 2267 states and 2845 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-15 18:08:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:05,563 INFO L93 Difference]: Finished difference Result 2321 states and 2901 transitions. [2023-12-15 18:08:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 18:08:05,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 133 [2023-12-15 18:08:05,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:05,567 INFO L225 Difference]: With dead ends: 2321 [2023-12-15 18:08:05,567 INFO L226 Difference]: Without dead ends: 1850 [2023-12-15 18:08:05,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-15 18:08:05,569 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 757 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:05,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 1511 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 18:08:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2023-12-15 18:08:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1799. [2023-12-15 18:08:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1463 states have (on average 1.300751879699248) internal successors, (1903), 1478 states have internal predecessors, (1903), 172 states have call successors, (172), 124 states have call predecessors, (172), 162 states have return successors, (231), 197 states have call predecessors, (231), 169 states have call successors, (231) [2023-12-15 18:08:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2306 transitions. [2023-12-15 18:08:05,642 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2306 transitions. Word has length 133 [2023-12-15 18:08:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:05,642 INFO L495 AbstractCegarLoop]: Abstraction has 1799 states and 2306 transitions. [2023-12-15 18:08:05,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-15 18:08:05,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2306 transitions. [2023-12-15 18:08:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-15 18:08:05,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:05,644 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:05,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-15 18:08:05,644 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:05,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:05,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2061799994, now seen corresponding path program 1 times [2023-12-15 18:08:05,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:05,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374323873] [2023-12-15 18:08:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:05,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:08:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:08:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:08:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:08:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:08:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:08:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-15 18:08:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-12-15 18:08:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-12-15 18:08:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-15 18:08:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:08:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:08:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-12-15 18:08:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-12-15 18:08:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-12-15 18:08:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-15 18:08:05,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374323873] [2023-12-15 18:08:05,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374323873] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:05,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:05,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:08:05,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46280790] [2023-12-15 18:08:05,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:05,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:08:05,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:05,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:08:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:08:05,724 INFO L87 Difference]: Start difference. First operand 1799 states and 2306 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-15 18:08:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:06,606 INFO L93 Difference]: Finished difference Result 2966 states and 3710 transitions. [2023-12-15 18:08:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 18:08:06,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 145 [2023-12-15 18:08:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:06,610 INFO L225 Difference]: With dead ends: 2966 [2023-12-15 18:08:06,610 INFO L226 Difference]: Without dead ends: 1707 [2023-12-15 18:08:06,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-15 18:08:06,612 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 687 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:06,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 1955 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 18:08:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2023-12-15 18:08:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1568. [2023-12-15 18:08:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1283 states have (on average 1.3211223694466094) internal successors, (1695), 1298 states have internal predecessors, (1695), 147 states have call successors, (147), 103 states have call predecessors, (147), 136 states have return successors, (193), 167 states have call predecessors, (193), 144 states have call successors, (193) [2023-12-15 18:08:06,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2035 transitions. [2023-12-15 18:08:06,673 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2035 transitions. Word has length 145 [2023-12-15 18:08:06,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:06,673 INFO L495 AbstractCegarLoop]: Abstraction has 1568 states and 2035 transitions. [2023-12-15 18:08:06,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-15 18:08:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2035 transitions. [2023-12-15 18:08:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-15 18:08:06,675 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:06,675 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:06,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-15 18:08:06,675 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:06,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1631420159, now seen corresponding path program 1 times [2023-12-15 18:08:06,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:06,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139623906] [2023-12-15 18:08:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:06,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-15 18:08:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 18:08:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:08:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:08:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-15 18:08:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-15 18:08:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-12-15 18:08:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-12-15 18:08:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-12-15 18:08:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-12-15 18:08:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 18:08:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 18:08:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-12-15 18:08:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-12-15 18:08:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2023-12-15 18:08:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-15 18:08:06,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:06,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139623906] [2023-12-15 18:08:06,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139623906] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 18:08:06,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633440509] [2023-12-15 18:08:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:06,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:08:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 18:08:06,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 18:08:06,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 18:08:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:07,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 18:08:07,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 18:08:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-15 18:08:07,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 18:08:07,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633440509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:07,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-15 18:08:07,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-12-15 18:08:07,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757530811] [2023-12-15 18:08:07,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:07,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 18:08:07,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 18:08:07,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-15 18:08:07,136 INFO L87 Difference]: Start difference. First operand 1568 states and 2035 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-15 18:08:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:07,771 INFO L93 Difference]: Finished difference Result 3678 states and 4627 transitions. [2023-12-15 18:08:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 18:08:07,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 147 [2023-12-15 18:08:07,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:07,777 INFO L225 Difference]: With dead ends: 3678 [2023-12-15 18:08:07,777 INFO L226 Difference]: Without dead ends: 2396 [2023-12-15 18:08:07,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-12-15 18:08:07,781 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 377 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:07,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1001 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 18:08:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2023-12-15 18:08:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2357. [2023-12-15 18:08:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 1929 states have (on average 1.268532918610679) internal successors, (2447), 1948 states have internal predecessors, (2447), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2023-12-15 18:08:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 2968 transitions. [2023-12-15 18:08:07,879 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 2968 transitions. Word has length 147 [2023-12-15 18:08:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:07,880 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 2968 transitions. [2023-12-15 18:08:07,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-15 18:08:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 2968 transitions. [2023-12-15 18:08:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-15 18:08:07,881 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:07,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:07,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 18:08:08,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 18:08:08,088 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:08,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2123489297, now seen corresponding path program 1 times [2023-12-15 18:08:08,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:08,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672032850] [2023-12-15 18:08:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:08,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:08,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:08,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-15 18:08:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:08,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-15 18:08:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:08,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-15 18:08:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:08,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-15 18:08:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:08:08,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:08,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672032850] [2023-12-15 18:08:08,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672032850] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:08,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:08,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:08:08,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550161331] [2023-12-15 18:08:08,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:08,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:08:08,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:08:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:08:08,371 INFO L87 Difference]: Start difference. First operand 2357 states and 2968 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:10,989 INFO L93 Difference]: Finished difference Result 2939 states and 3952 transitions. [2023-12-15 18:08:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 18:08:10,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 172 [2023-12-15 18:08:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:10,994 INFO L225 Difference]: With dead ends: 2939 [2023-12-15 18:08:10,994 INFO L226 Difference]: Without dead ends: 2569 [2023-12-15 18:08:10,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-12-15 18:08:10,996 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1459 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:10,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 1544 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-15 18:08:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2023-12-15 18:08:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2359. [2023-12-15 18:08:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 1931 states have (on average 1.2677369238736407) internal successors, (2448), 1950 states have internal predecessors, (2448), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2023-12-15 18:08:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 2969 transitions. [2023-12-15 18:08:11,179 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 2969 transitions. Word has length 172 [2023-12-15 18:08:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:11,179 INFO L495 AbstractCegarLoop]: Abstraction has 2359 states and 2969 transitions. [2023-12-15 18:08:11,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 2969 transitions. [2023-12-15 18:08:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-15 18:08:11,181 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:11,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:11,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-15 18:08:11,181 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:11,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1781140659, now seen corresponding path program 1 times [2023-12-15 18:08:11,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:11,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105678558] [2023-12-15 18:08:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:11,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:11,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:11,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-15 18:08:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:11,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-15 18:08:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:11,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-15 18:08:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:11,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-15 18:08:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:08:11,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:11,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105678558] [2023-12-15 18:08:11,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105678558] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:11,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:11,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:08:11,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779405614] [2023-12-15 18:08:11,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:11,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:08:11,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:08:11,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:08:11,327 INFO L87 Difference]: Start difference. First operand 2359 states and 2969 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:13,929 INFO L93 Difference]: Finished difference Result 2907 states and 3896 transitions. [2023-12-15 18:08:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 18:08:13,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 172 [2023-12-15 18:08:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:13,933 INFO L225 Difference]: With dead ends: 2907 [2023-12-15 18:08:13,933 INFO L226 Difference]: Without dead ends: 2543 [2023-12-15 18:08:13,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-12-15 18:08:13,934 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 1315 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:13,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1343 Valid, 1540 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-15 18:08:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2023-12-15 18:08:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2361. [2023-12-15 18:08:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 1933 states have (on average 1.2669425763062596) internal successors, (2449), 1952 states have internal predecessors, (2449), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2023-12-15 18:08:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 2970 transitions. [2023-12-15 18:08:14,099 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 2970 transitions. Word has length 172 [2023-12-15 18:08:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:14,100 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 2970 transitions. [2023-12-15 18:08:14,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 2970 transitions. [2023-12-15 18:08:14,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-15 18:08:14,101 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:14,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:14,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-15 18:08:14,102 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:14,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1461100237, now seen corresponding path program 1 times [2023-12-15 18:08:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:14,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988959523] [2023-12-15 18:08:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:14,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:14,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-15 18:08:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:14,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-15 18:08:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:14,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-15 18:08:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:14,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-15 18:08:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:08:14,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:14,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988959523] [2023-12-15 18:08:14,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988959523] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:14,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:14,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-15 18:08:14,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843041086] [2023-12-15 18:08:14,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:14,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 18:08:14,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 18:08:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-15 18:08:14,279 INFO L87 Difference]: Start difference. First operand 2361 states and 2970 transitions. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 6 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:18,479 INFO L93 Difference]: Finished difference Result 3448 states and 4808 transitions. [2023-12-15 18:08:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-15 18:08:18,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 6 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 172 [2023-12-15 18:08:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:18,484 INFO L225 Difference]: With dead ends: 3448 [2023-12-15 18:08:18,484 INFO L226 Difference]: Without dead ends: 3089 [2023-12-15 18:08:18,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2023-12-15 18:08:18,486 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1993 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 4007 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2025 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 4166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 4007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:18,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2025 Valid, 1998 Invalid, 4166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 4007 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-15 18:08:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2023-12-15 18:08:18,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2744. [2023-12-15 18:08:18,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2287 states have (on average 1.324879755137735) internal successors, (3030), 2307 states have internal predecessors, (3030), 239 states have call successors, (239), 160 states have call predecessors, (239), 216 states have return successors, (329), 277 states have call predecessors, (329), 236 states have call successors, (329) [2023-12-15 18:08:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 3598 transitions. [2023-12-15 18:08:18,720 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 3598 transitions. Word has length 172 [2023-12-15 18:08:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:18,721 INFO L495 AbstractCegarLoop]: Abstraction has 2744 states and 3598 transitions. [2023-12-15 18:08:18,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 6 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 3598 transitions. [2023-12-15 18:08:18,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-15 18:08:18,726 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:18,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:18,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-15 18:08:18,726 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:18,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1452462829, now seen corresponding path program 1 times [2023-12-15 18:08:18,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:18,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043026881] [2023-12-15 18:08:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:18,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:18,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:18,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-15 18:08:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:18,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-15 18:08:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:18,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-15 18:08:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:18,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-15 18:08:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:08:18,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:18,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043026881] [2023-12-15 18:08:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043026881] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:18,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:18,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:08:18,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035578802] [2023-12-15 18:08:18,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:18,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:08:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:08:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:08:18,941 INFO L87 Difference]: Start difference. First operand 2744 states and 3598 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:23,083 INFO L93 Difference]: Finished difference Result 4327 states and 6232 transitions. [2023-12-15 18:08:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 18:08:23,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 172 [2023-12-15 18:08:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:23,090 INFO L225 Difference]: With dead ends: 4327 [2023-12-15 18:08:23,090 INFO L226 Difference]: Without dead ends: 3585 [2023-12-15 18:08:23,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-15 18:08:23,092 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 1833 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 4264 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 4365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:23,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1863 Valid, 2414 Invalid, 4365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4264 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-15 18:08:23,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2023-12-15 18:08:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3096. [2023-12-15 18:08:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 2610 states have (on average 1.360536398467433) internal successors, (3551), 2631 states have internal predecessors, (3551), 261 states have call successors, (261), 166 states have call predecessors, (261), 223 states have return successors, (353), 300 states have call predecessors, (353), 258 states have call successors, (353) [2023-12-15 18:08:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 4165 transitions. [2023-12-15 18:08:23,513 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 4165 transitions. Word has length 172 [2023-12-15 18:08:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:23,513 INFO L495 AbstractCegarLoop]: Abstraction has 3096 states and 4165 transitions. [2023-12-15 18:08:23,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 4165 transitions. [2023-12-15 18:08:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-15 18:08:23,515 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:23,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:23,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-15 18:08:23,515 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:23,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1838325231, now seen corresponding path program 1 times [2023-12-15 18:08:23,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:23,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389155063] [2023-12-15 18:08:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:23,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:23,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:23,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-15 18:08:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:23,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-15 18:08:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:23,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-15 18:08:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:23,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-15 18:08:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:08:23,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:23,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389155063] [2023-12-15 18:08:23,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389155063] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:23,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:23,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:08:23,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67068961] [2023-12-15 18:08:23,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:23,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:08:23,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:08:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:08:23,848 INFO L87 Difference]: Start difference. First operand 3096 states and 4165 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:27,397 INFO L93 Difference]: Finished difference Result 5692 states and 8477 transitions. [2023-12-15 18:08:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 18:08:27,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 172 [2023-12-15 18:08:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:27,416 INFO L225 Difference]: With dead ends: 5692 [2023-12-15 18:08:27,417 INFO L226 Difference]: Without dead ends: 4598 [2023-12-15 18:08:27,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-15 18:08:27,421 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 1831 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 4260 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1861 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 4363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 4260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:27,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1861 Valid, 2412 Invalid, 4363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 4260 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-15 18:08:27,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4598 states. [2023-12-15 18:08:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4598 to 3801. [2023-12-15 18:08:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3257 states have (on average 1.4105004605465152) internal successors, (4594), 3280 states have internal predecessors, (4594), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2023-12-15 18:08:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5304 transitions. [2023-12-15 18:08:27,665 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5304 transitions. Word has length 172 [2023-12-15 18:08:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:27,685 INFO L495 AbstractCegarLoop]: Abstraction has 3801 states and 5304 transitions. [2023-12-15 18:08:27,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5304 transitions. [2023-12-15 18:08:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-15 18:08:27,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:27,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:27,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-15 18:08:27,689 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:27,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1573677741, now seen corresponding path program 1 times [2023-12-15 18:08:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:27,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960107199] [2023-12-15 18:08:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:27,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:27,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-15 18:08:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-15 18:08:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:27,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-15 18:08:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:27,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-15 18:08:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:08:27,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960107199] [2023-12-15 18:08:27,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960107199] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:27,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:27,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:08:27,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525289018] [2023-12-15 18:08:27,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:27,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:08:27,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:27,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:08:27,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:08:27,864 INFO L87 Difference]: Start difference. First operand 3801 states and 5304 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:29,844 INFO L93 Difference]: Finished difference Result 6385 states and 9607 transitions. [2023-12-15 18:08:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 18:08:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 172 [2023-12-15 18:08:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:29,852 INFO L225 Difference]: With dead ends: 6385 [2023-12-15 18:08:29,852 INFO L226 Difference]: Without dead ends: 4586 [2023-12-15 18:08:29,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-15 18:08:29,856 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1575 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1606 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 2172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:29,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1606 Valid, 1127 Invalid, 2172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-15 18:08:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2023-12-15 18:08:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 3801. [2023-12-15 18:08:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3257 states have (on average 1.408965305495855) internal successors, (4589), 3280 states have internal predecessors, (4589), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2023-12-15 18:08:30,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5299 transitions. [2023-12-15 18:08:30,085 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5299 transitions. Word has length 172 [2023-12-15 18:08:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:30,085 INFO L495 AbstractCegarLoop]: Abstraction has 3801 states and 5299 transitions. [2023-12-15 18:08:30,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5299 transitions. [2023-12-15 18:08:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-15 18:08:30,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:30,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:30,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-15 18:08:30,087 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:30,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash -790163921, now seen corresponding path program 1 times [2023-12-15 18:08:30,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:30,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399057210] [2023-12-15 18:08:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:30,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:30,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:30,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-15 18:08:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:30,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-15 18:08:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:30,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-15 18:08:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:30,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-15 18:08:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:08:30,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:30,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399057210] [2023-12-15 18:08:30,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399057210] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:30,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:30,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:08:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755096096] [2023-12-15 18:08:30,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:30,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:08:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:08:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:08:30,293 INFO L87 Difference]: Start difference. First operand 3801 states and 5299 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:32,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:32,150 INFO L93 Difference]: Finished difference Result 6379 states and 9581 transitions. [2023-12-15 18:08:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 18:08:32,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 172 [2023-12-15 18:08:32,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:32,159 INFO L225 Difference]: With dead ends: 6379 [2023-12-15 18:08:32,159 INFO L226 Difference]: Without dead ends: 4580 [2023-12-15 18:08:32,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-15 18:08:32,162 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1579 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:32,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 1127 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-15 18:08:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2023-12-15 18:08:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 3801. [2023-12-15 18:08:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3257 states have (on average 1.407430150445195) internal successors, (4584), 3280 states have internal predecessors, (4584), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2023-12-15 18:08:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5294 transitions. [2023-12-15 18:08:32,401 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5294 transitions. Word has length 172 [2023-12-15 18:08:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:32,402 INFO L495 AbstractCegarLoop]: Abstraction has 3801 states and 5294 transitions. [2023-12-15 18:08:32,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5294 transitions. [2023-12-15 18:08:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-15 18:08:32,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:32,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:32,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-15 18:08:32,405 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:32,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2113342867, now seen corresponding path program 1 times [2023-12-15 18:08:32,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:32,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938932989] [2023-12-15 18:08:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:32,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:32,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:32,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-15 18:08:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:32,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-15 18:08:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:32,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-15 18:08:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:32,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-15 18:08:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:08:32,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:32,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938932989] [2023-12-15 18:08:32,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938932989] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:32,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:32,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:08:32,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614650693] [2023-12-15 18:08:32,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:32,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:08:32,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:32,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:08:32,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:08:32,604 INFO L87 Difference]: Start difference. First operand 3801 states and 5294 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:36,427 INFO L93 Difference]: Finished difference Result 8290 states and 12676 transitions. [2023-12-15 18:08:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 18:08:36,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 172 [2023-12-15 18:08:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:36,443 INFO L225 Difference]: With dead ends: 8290 [2023-12-15 18:08:36,443 INFO L226 Difference]: Without dead ends: 6491 [2023-12-15 18:08:36,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-15 18:08:36,449 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 1934 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 3517 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 3662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 3517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:36,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1964 Valid, 1642 Invalid, 3662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 3517 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-15 18:08:36,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6491 states. [2023-12-15 18:08:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6491 to 5225. [2023-12-15 18:08:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5225 states, 4565 states have (on average 1.4637458926615554) internal successors, (6682), 4592 states have internal predecessors, (6682), 393 states have call successors, (393), 202 states have call predecessors, (393), 265 states have return successors, (515), 438 states have call predecessors, (515), 390 states have call successors, (515) [2023-12-15 18:08:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5225 states to 5225 states and 7590 transitions. [2023-12-15 18:08:36,776 INFO L78 Accepts]: Start accepts. Automaton has 5225 states and 7590 transitions. Word has length 172 [2023-12-15 18:08:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:36,776 INFO L495 AbstractCegarLoop]: Abstraction has 5225 states and 7590 transitions. [2023-12-15 18:08:36,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5225 states and 7590 transitions. [2023-12-15 18:08:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-15 18:08:36,779 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:36,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:36,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-15 18:08:36,779 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:36,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1775055317, now seen corresponding path program 1 times [2023-12-15 18:08:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:36,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399529069] [2023-12-15 18:08:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:36,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:36,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-15 18:08:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:36,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-15 18:08:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:36,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-15 18:08:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:36,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-15 18:08:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:08:36,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399529069] [2023-12-15 18:08:36,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399529069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:36,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:36,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:08:36,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898875884] [2023-12-15 18:08:36,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:36,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:08:36,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:08:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:08:36,954 INFO L87 Difference]: Start difference. First operand 5225 states and 7590 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 18:08:38,936 INFO L93 Difference]: Finished difference Result 9741 states and 15053 transitions. [2023-12-15 18:08:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 18:08:38,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 172 [2023-12-15 18:08:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 18:08:38,951 INFO L225 Difference]: With dead ends: 9741 [2023-12-15 18:08:38,951 INFO L226 Difference]: Without dead ends: 6518 [2023-12-15 18:08:38,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-15 18:08:38,960 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1576 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:38,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1607 Valid, 1127 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-15 18:08:38,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6518 states. [2023-12-15 18:08:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6518 to 5225. [2023-12-15 18:08:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5225 states, 4565 states have (on average 1.4617743702081052) internal successors, (6673), 4592 states have internal predecessors, (6673), 393 states have call successors, (393), 202 states have call predecessors, (393), 265 states have return successors, (515), 438 states have call predecessors, (515), 390 states have call successors, (515) [2023-12-15 18:08:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5225 states to 5225 states and 7581 transitions. [2023-12-15 18:08:39,295 INFO L78 Accepts]: Start accepts. Automaton has 5225 states and 7581 transitions. Word has length 172 [2023-12-15 18:08:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 18:08:39,295 INFO L495 AbstractCegarLoop]: Abstraction has 5225 states and 7581 transitions. [2023-12-15 18:08:39,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 18:08:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 5225 states and 7581 transitions. [2023-12-15 18:08:39,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-15 18:08:39,298 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 18:08:39,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:39,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-15 18:08:39,298 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 18:08:39,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 18:08:39,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1348500819, now seen corresponding path program 1 times [2023-12-15 18:08:39,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 18:08:39,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929431866] [2023-12-15 18:08:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 18:08:39,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 18:08:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:39,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 18:08:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:39,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-15 18:08:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:39,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-15 18:08:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:39,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-15 18:08:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:39,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-15 18:08:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 18:08:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 18:08:39,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 18:08:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929431866] [2023-12-15 18:08:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929431866] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 18:08:39,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 18:08:39,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 18:08:39,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732944866] [2023-12-15 18:08:39,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 18:08:39,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 18:08:39,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 18:08:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 18:08:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-15 18:08:39,496 INFO L87 Difference]: Start difference. First operand 5225 states and 7581 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Received shutdown request... [2023-12-15 18:08:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 18:08:42,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-15 18:08:42,839 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 1618 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 3394 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 3484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-15 18:08:42,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1631 Valid, 1856 Invalid, 3484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3394 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-15 18:08:42,843 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 18:08:42,844 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-12-15 18:08:42,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-15 18:08:42,845 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (5225states) and FLOYD_HOARE automaton (currently 14 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (9535 states constructed, input type IntersectNwa). [2023-12-15 18:08:42,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-15 18:08:42,848 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 18:08:42,856 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 18:08:42,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 06:08:42 BoogieIcfgContainer [2023-12-15 18:08:42,857 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 18:08:42,858 INFO L158 Benchmark]: Toolchain (without parser) took 59814.57ms. Allocated memory was 286.3MB in the beginning and 942.7MB in the end (delta: 656.4MB). Free memory was 233.2MB in the beginning and 637.4MB in the end (delta: -404.2MB). Peak memory consumption was 253.6MB. Max. memory is 8.0GB. [2023-12-15 18:08:42,859 INFO L158 Benchmark]: CDTParser took 0.98ms. Allocated memory is still 238.0MB. Free memory is still 187.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 18:08:42,859 INFO L158 Benchmark]: CACSL2BoogieTranslator took 499.92ms. Allocated memory is still 286.3MB. Free memory was 233.2MB in the beginning and 204.1MB in the end (delta: 29.1MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2023-12-15 18:08:42,860 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.79ms. Allocated memory is still 286.3MB. Free memory was 204.1MB in the beginning and 199.2MB in the end (delta: 4.9MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2023-12-15 18:08:42,860 INFO L158 Benchmark]: Boogie Preprocessor took 56.39ms. Allocated memory is still 286.3MB. Free memory was 199.2MB in the beginning and 192.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2023-12-15 18:08:42,862 INFO L158 Benchmark]: RCFGBuilder took 966.81ms. Allocated memory is still 286.3MB. Free memory was 192.6MB in the beginning and 183.6MB in the end (delta: 9.0MB). Peak memory consumption was 14.9MB. Max. memory is 8.0GB. [2023-12-15 18:08:42,862 INFO L158 Benchmark]: TraceAbstraction took 58231.46ms. Allocated memory was 286.3MB in the beginning and 942.7MB in the end (delta: 656.4MB). Free memory was 183.0MB in the beginning and 637.4MB in the end (delta: -454.4MB). Peak memory consumption was 202.0MB. Max. memory is 8.0GB. [2023-12-15 18:08:42,869 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.98ms. Allocated memory is still 238.0MB. Free memory is still 187.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 499.92ms. Allocated memory is still 286.3MB. Free memory was 233.2MB in the beginning and 204.1MB in the end (delta: 29.1MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 55.79ms. Allocated memory is still 286.3MB. Free memory was 204.1MB in the beginning and 199.2MB in the end (delta: 4.9MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 56.39ms. Allocated memory is still 286.3MB. Free memory was 199.2MB in the beginning and 192.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * RCFGBuilder took 966.81ms. Allocated memory is still 286.3MB. Free memory was 192.6MB in the beginning and 183.6MB in the end (delta: 9.0MB). Peak memory consumption was 14.9MB. Max. memory is 8.0GB. * TraceAbstraction took 58231.46ms. Allocated memory was 286.3MB in the beginning and 942.7MB in the end (delta: 656.4MB). Free memory was 183.0MB in the beginning and 637.4MB in the end (delta: -454.4MB). Peak memory consumption was 202.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 496]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 496). Cancelled while NwaCegarLoop was constructing difference of abstraction (5225states) and FLOYD_HOARE automaton (currently 14 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (9535 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 28]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 28). Cancelled while NwaCegarLoop was constructing difference of abstraction (5225states) and FLOYD_HOARE automaton (currently 14 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (9535 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 16 procedures, 468 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 58.2s, OverallIterations: 27, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 47.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41264 SdHoareTripleChecker+Valid, 33.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40661 mSDsluCounter, 47736 SdHoareTripleChecker+Invalid, 28.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 36946 mSDsCounter, 4419 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53593 IncrementalHoareTripleChecker+Invalid, 58012 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4419 mSolverCounterUnsat, 10790 mSDtfsCounter, 53593 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1335 GetRequests, 948 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 10.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7837occurred in iteration=10, InterpolantAutomatonStates: 337, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.6s AutomataMinimizationTime, 26 MinimizatonAttempts, 10508 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 3467 NumberOfCodeBlocks, 3467 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 3504 ConstructedInterpolants, 0 QuantifiedInterpolants, 8715 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1605 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 31 InterpolantComputations, 26 PerfectInterpolantSequences, 484/501 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown