/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 14:52:00,911 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 14:52:00,980 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 14:52:00,984 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 14:52:00,985 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 14:52:01,009 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 14:52:01,010 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 14:52:01,010 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 14:52:01,010 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 14:52:01,014 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 14:52:01,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 14:52:01,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 14:52:01,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 14:52:01,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 14:52:01,016 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 14:52:01,016 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 14:52:01,016 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 14:52:01,017 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 14:52:01,017 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 14:52:01,018 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 14:52:01,018 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 14:52:01,026 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 14:52:01,026 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 14:52:01,026 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 14:52:01,026 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 14:52:01,026 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 14:52:01,026 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 14:52:01,027 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 14:52:01,027 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 14:52:01,027 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 14:52:01,028 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 14:52:01,028 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 14:52:01,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 14:52:01,029 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 14:52:01,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 14:52:01,029 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 14:52:01,029 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 14:52:01,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 14:52:01,029 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 14:52:01,029 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 14:52:01,029 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 14:52:01,030 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 14:52:01,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 14:52:01,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 14:52:01,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 14:52:01,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 14:52:01,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 14:52:01,256 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 14:52:01,256 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 14:52:01,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c [2023-12-20 14:52:02,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 14:52:02,577 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 14:52:02,578 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c [2023-12-20 14:52:02,593 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fef8e096/cddaf79cfedb4132a7617e8070216e1c/FLAG5aee28558 [2023-12-20 14:52:02,604 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fef8e096/cddaf79cfedb4132a7617e8070216e1c [2023-12-20 14:52:02,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 14:52:02,607 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 14:52:02,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 14:52:02,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 14:52:02,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 14:52:02,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:02,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@200bda50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02, skipping insertion in model container [2023-12-20 14:52:02,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:02,654 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 14:52:02,747 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_3.cil+token_ring.03.cil-2.c[911,924] [2023-12-20 14:52:02,787 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_3.cil+token_ring.03.cil-2.c[8416,8429] [2023-12-20 14:52:02,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 14:52:02,859 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 14:52:02,867 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_3.cil+token_ring.03.cil-2.c[911,924] [2023-12-20 14:52:02,895 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_3.cil+token_ring.03.cil-2.c[8416,8429] [2023-12-20 14:52:02,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 14:52:02,981 INFO L206 MainTranslator]: Completed translation [2023-12-20 14:52:02,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02 WrapperNode [2023-12-20 14:52:02,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 14:52:02,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 14:52:02,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 14:52:02,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 14:52:03,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,078 INFO L138 Inliner]: procedures = 61, calls = 70, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 566 [2023-12-20 14:52:03,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 14:52:03,079 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 14:52:03,079 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 14:52:03,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 14:52:03,086 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,088 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,109 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]. [2023-12-20 14:52:03,109 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,110 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,117 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,129 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 14:52:03,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 14:52:03,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 14:52:03,149 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 14:52:03,149 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (1/1) ... [2023-12-20 14:52:03,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 14:52:03,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:52:03,202 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) [2023-12-20 14:52:03,223 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 [2023-12-20 14:52:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 14:52:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-20 14:52:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-20 14:52:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-20 14:52:03,230 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-20 14:52:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-20 14:52:03,230 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-20 14:52:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-20 14:52:03,231 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-20 14:52:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-20 14:52:03,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-20 14:52:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-20 14:52:03,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-20 14:52:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-20 14:52:03,231 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-20 14:52:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-20 14:52:03,231 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-20 14:52:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-20 14:52:03,231 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-20 14:52:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-20 14:52:03,232 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-20 14:52:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-20 14:52:03,232 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-20 14:52:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 14:52:03,233 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-20 14:52:03,233 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-20 14:52:03,234 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-20 14:52:03,234 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-20 14:52:03,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 14:52:03,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 14:52:03,234 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-20 14:52:03,234 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-20 14:52:03,332 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 14:52:03,335 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 14:52:03,727 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-12-20 14:52:03,727 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-12-20 14:52:03,762 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 14:52:03,793 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 14:52:03,793 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-12-20 14:52:03,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:52:03 BoogieIcfgContainer [2023-12-20 14:52:03,793 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 14:52:03,795 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 14:52:03,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 14:52:03,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 14:52:03,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 02:52:02" (1/3) ... [2023-12-20 14:52:03,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e38ba22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:52:03, skipping insertion in model container [2023-12-20 14:52:03,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:52:02" (2/3) ... [2023-12-20 14:52:03,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e38ba22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:52:03, skipping insertion in model container [2023-12-20 14:52:03,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:52:03" (3/3) ... [2023-12-20 14:52:03,799 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.03.cil-2.c [2023-12-20 14:52:03,810 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 14:52:03,810 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-20 14:52:03,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 14:52:03,850 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;@7a7477a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 14:52:03,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-20 14:52:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 195 states have (on average 1.6564102564102565) internal successors, (323), 201 states have internal predecessors, (323), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-20 14:52:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-20 14:52:03,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:03,867 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] [2023-12-20 14:52:03,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:03,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:03,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1120505272, now seen corresponding path program 1 times [2023-12-20 14:52:03,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:03,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892115053] [2023-12-20 14:52:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:03,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:04,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:04,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:52:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:04,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:52:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:04,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:52:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:04,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:52:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:04,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:52:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:04,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:52:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:04,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:04,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892115053] [2023-12-20 14:52:04,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892115053] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:04,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:04,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 14:52:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657298901] [2023-12-20 14:52:04,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:04,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 14:52:04,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:04,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 14:52:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-20 14:52:04,279 INFO L87 Difference]: Start difference. First operand has 245 states, 195 states have (on average 1.6564102564102565) internal successors, (323), 201 states have internal predecessors, (323), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 5 states have internal predecessors, (42), 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) [2023-12-20 14:52:05,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:05,125 INFO L93 Difference]: Finished difference Result 612 states and 973 transitions. [2023-12-20 14:52:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:52:05,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 5 states have internal predecessors, (42), 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 57 [2023-12-20 14:52:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:05,136 INFO L225 Difference]: With dead ends: 612 [2023-12-20 14:52:05,136 INFO L226 Difference]: Without dead ends: 378 [2023-12-20 14:52:05,139 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 [2023-12-20 14:52:05,141 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 694 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:05,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 791 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 14:52:05,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-12-20 14:52:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 341. [2023-12-20 14:52:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 271 states have (on average 1.5202952029520296) internal successors, (412), 277 states have internal predecessors, (412), 46 states have call successors, (46), 21 states have call predecessors, (46), 22 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2023-12-20 14:52:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 507 transitions. [2023-12-20 14:52:05,193 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 507 transitions. Word has length 57 [2023-12-20 14:52:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:05,194 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 507 transitions. [2023-12-20 14:52:05,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 5 states have internal predecessors, (42), 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) [2023-12-20 14:52:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 507 transitions. [2023-12-20 14:52:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-20 14:52:05,197 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:05,197 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] [2023-12-20 14:52:05,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 14:52:05,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:05,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:05,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1230469256, now seen corresponding path program 1 times [2023-12-20 14:52:05,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:05,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756775691] [2023-12-20 14:52:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:05,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:05,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:05,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:52:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:05,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:52:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:05,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:52:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:05,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:52:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:52:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:05,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:52:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:05,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:05,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756775691] [2023-12-20 14:52:05,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756775691] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:05,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:05,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 14:52:05,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964467476] [2023-12-20 14:52:05,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:05,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 14:52:05,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 14:52:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-20 14:52:05,317 INFO L87 Difference]: Start difference. First operand 341 states and 507 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-12-20 14:52:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:06,133 INFO L93 Difference]: Finished difference Result 702 states and 1037 transitions. [2023-12-20 14:52:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 14:52:06,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 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 57 [2023-12-20 14:52:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:06,136 INFO L225 Difference]: With dead ends: 702 [2023-12-20 14:52:06,136 INFO L226 Difference]: Without dead ends: 514 [2023-12-20 14:52:06,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-12-20 14:52:06,138 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 879 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:06,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 1056 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:52:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-12-20 14:52:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 442. [2023-12-20 14:52:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 350 states have (on average 1.5057142857142858) internal successors, (527), 358 states have internal predecessors, (527), 59 states have call successors, (59), 28 states have call predecessors, (59), 31 states have return successors, (70), 59 states have call predecessors, (70), 57 states have call successors, (70) [2023-12-20 14:52:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 656 transitions. [2023-12-20 14:52:06,173 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 656 transitions. Word has length 57 [2023-12-20 14:52:06,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:06,173 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 656 transitions. [2023-12-20 14:52:06,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-12-20 14:52:06,174 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 656 transitions. [2023-12-20 14:52:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-20 14:52:06,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:06,176 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] [2023-12-20 14:52:06,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 14:52:06,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:06,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2123955594, now seen corresponding path program 1 times [2023-12-20 14:52:06,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:06,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861776543] [2023-12-20 14:52:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:06,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:52:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:52:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:52:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 14:52:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-20 14:52:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:52:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:06,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:06,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861776543] [2023-12-20 14:52:06,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861776543] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:06,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:06,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:52:06,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296500772] [2023-12-20 14:52:06,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:06,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:52:06,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:06,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:52:06,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:06,269 INFO L87 Difference]: Start difference. First operand 442 states and 656 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-20 14:52:06,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:06,880 INFO L93 Difference]: Finished difference Result 1048 states and 1532 transitions. [2023-12-20 14:52:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 14:52:06,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 57 [2023-12-20 14:52:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:06,884 INFO L225 Difference]: With dead ends: 1048 [2023-12-20 14:52:06,884 INFO L226 Difference]: Without dead ends: 765 [2023-12-20 14:52:06,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-12-20 14:52:06,886 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 965 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:06,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 760 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:52:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-12-20 14:52:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 694. [2023-12-20 14:52:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 547 states have (on average 1.4716636197440585) internal successors, (805), 559 states have internal predecessors, (805), 89 states have call successors, (89), 49 states have call predecessors, (89), 56 states have return successors, (108), 89 states have call predecessors, (108), 87 states have call successors, (108) [2023-12-20 14:52:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1002 transitions. [2023-12-20 14:52:06,917 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1002 transitions. Word has length 57 [2023-12-20 14:52:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:06,917 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1002 transitions. [2023-12-20 14:52:06,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-20 14:52:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1002 transitions. [2023-12-20 14:52:06,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 14:52:06,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:06,932 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] [2023-12-20 14:52:06,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 14:52:06,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:06,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:06,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2084994321, now seen corresponding path program 1 times [2023-12-20 14:52:06,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:06,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697181315] [2023-12-20 14:52:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:06,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:52:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:52:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:06,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:52:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:52:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 14:52:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:52:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:07,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:07,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697181315] [2023-12-20 14:52:07,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697181315] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:07,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:07,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-20 14:52:07,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250167521] [2023-12-20 14:52:07,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:07,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 14:52:07,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:07,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 14:52:07,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-20 14:52:07,019 INFO L87 Difference]: Start difference. First operand 694 states and 1002 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) [2023-12-20 14:52:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:07,707 INFO L93 Difference]: Finished difference Result 1302 states and 1872 transitions. [2023-12-20 14:52:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 14:52:07,708 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 [2023-12-20 14:52:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:07,712 INFO L225 Difference]: With dead ends: 1302 [2023-12-20 14:52:07,712 INFO L226 Difference]: Without dead ends: 767 [2023-12-20 14:52:07,714 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 [2023-12-20 14:52:07,719 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 291 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:07,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 1292 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 14:52:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-12-20 14:52:07,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 706. [2023-12-20 14:52:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 556 states have (on average 1.45863309352518) internal successors, (811), 568 states have internal predecessors, (811), 89 states have call successors, (89), 49 states have call predecessors, (89), 59 states have return successors, (111), 92 states have call predecessors, (111), 87 states have call successors, (111) [2023-12-20 14:52:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1011 transitions. [2023-12-20 14:52:07,769 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1011 transitions. Word has length 58 [2023-12-20 14:52:07,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:07,769 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 1011 transitions. [2023-12-20 14:52:07,770 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) [2023-12-20 14:52:07,770 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1011 transitions. [2023-12-20 14:52:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-20 14:52:07,771 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:07,771 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] [2023-12-20 14:52:07,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 14:52:07,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:07,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2012607763, now seen corresponding path program 1 times [2023-12-20 14:52:07,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:07,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592614634] [2023-12-20 14:52:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:07,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:52:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:52:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:52:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:52:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-20 14:52:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:52:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:07,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:07,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592614634] [2023-12-20 14:52:07,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592614634] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:07,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:07,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-20 14:52:07,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080525034] [2023-12-20 14:52:07,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:07,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 14:52:07,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:07,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 14:52:07,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-20 14:52:07,891 INFO L87 Difference]: Start difference. First operand 706 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-20 14:52:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:09,265 INFO L93 Difference]: Finished difference Result 2705 states and 3926 transitions. [2023-12-20 14:52:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 14:52:09,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 58 [2023-12-20 14:52:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:09,270 INFO L225 Difference]: With dead ends: 2705 [2023-12-20 14:52:09,270 INFO L226 Difference]: Without dead ends: 1039 [2023-12-20 14:52:09,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 14:52:09,273 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1569 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:09,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 1322 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 14:52:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2023-12-20 14:52:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 909. [2023-12-20 14:52:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 703 states have (on average 1.4082503556187767) internal successors, (990), 719 states have internal predecessors, (990), 119 states have call successors, (119), 70 states have call predecessors, (119), 85 states have return successors, (160), 123 states have call predecessors, (160), 117 states have call successors, (160) [2023-12-20 14:52:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1269 transitions. [2023-12-20 14:52:09,310 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1269 transitions. Word has length 58 [2023-12-20 14:52:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:09,310 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1269 transitions. [2023-12-20 14:52:09,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-20 14:52:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1269 transitions. [2023-12-20 14:52:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-20 14:52:09,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:09,312 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] [2023-12-20 14:52:09,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 14:52:09,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:09,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1632265311, now seen corresponding path program 1 times [2023-12-20 14:52:09,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:09,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144981045] [2023-12-20 14:52:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:09,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:09,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:09,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:52:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:09,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 14:52:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:09,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 14:52:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:09,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 14:52:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:09,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-20 14:52:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:09,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-12-20 14:52:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:09,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:09,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144981045] [2023-12-20 14:52:09,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144981045] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:09,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:09,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-20 14:52:09,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424077595] [2023-12-20 14:52:09,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:09,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 14:52:09,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:09,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 14:52:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-20 14:52:09,439 INFO L87 Difference]: Start difference. First operand 909 states and 1269 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 5 states have internal predecessors, (44), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-20 14:52:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:10,097 INFO L93 Difference]: Finished difference Result 2001 states and 2801 transitions. [2023-12-20 14:52:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 14:52:10,098 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), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 59 [2023-12-20 14:52:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:10,099 INFO L225 Difference]: With dead ends: 2001 [2023-12-20 14:52:10,099 INFO L226 Difference]: Without dead ends: 140 [2023-12-20 14:52:10,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-12-20 14:52:10,103 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 942 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:10,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 925 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:52:10,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-20 14:52:10,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-12-20 14:52:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 116 states have (on average 1.5517241379310345) internal successors, (180), 117 states have internal predecessors, (180), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-20 14:52:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 214 transitions. [2023-12-20 14:52:10,109 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 214 transitions. Word has length 59 [2023-12-20 14:52:10,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:10,109 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 214 transitions. [2023-12-20 14:52:10,109 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), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-20 14:52:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 214 transitions. [2023-12-20 14:52:10,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 14:52:10,110 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:10,110 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] [2023-12-20 14:52:10,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 14:52:10,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:10,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:10,111 INFO L85 PathProgramCache]: Analyzing trace with hash -125065604, now seen corresponding path program 1 times [2023-12-20 14:52:10,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:10,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650386022] [2023-12-20 14:52:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:10,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:10,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:10,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650386022] [2023-12-20 14:52:10,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650386022] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:10,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:10,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 14:52:10,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355540646] [2023-12-20 14:52:10,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:10,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 14:52:10,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 14:52:10,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:52:10,164 INFO L87 Difference]: Start difference. First operand 140 states and 214 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:10,535 INFO L93 Difference]: Finished difference Result 313 states and 488 transitions. [2023-12-20 14:52:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 14:52:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-12-20 14:52:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:10,537 INFO L225 Difference]: With dead ends: 313 [2023-12-20 14:52:10,537 INFO L226 Difference]: Without dead ends: 180 [2023-12-20 14:52:10,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-20 14:52:10,538 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 336 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:10,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 253 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 14:52:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-20 14:52:10,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 140. [2023-12-20 14:52:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 116 states have (on average 1.543103448275862) internal successors, (179), 117 states have internal predecessors, (179), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-20 14:52:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 213 transitions. [2023-12-20 14:52:10,544 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 213 transitions. Word has length 71 [2023-12-20 14:52:10,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:10,544 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 213 transitions. [2023-12-20 14:52:10,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 213 transitions. [2023-12-20 14:52:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 14:52:10,545 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:10,545 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] [2023-12-20 14:52:10,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 14:52:10,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:10,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:10,546 INFO L85 PathProgramCache]: Analyzing trace with hash 292331002, now seen corresponding path program 1 times [2023-12-20 14:52:10,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:10,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683503431] [2023-12-20 14:52:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:10,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:10,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:10,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683503431] [2023-12-20 14:52:10,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683503431] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:10,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:10,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 14:52:10,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103068691] [2023-12-20 14:52:10,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:10,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 14:52:10,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:10,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 14:52:10,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:52:10,621 INFO L87 Difference]: Start difference. First operand 140 states and 213 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:11,247 INFO L93 Difference]: Finished difference Result 481 states and 753 transitions. [2023-12-20 14:52:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 14:52:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-12-20 14:52:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:11,249 INFO L225 Difference]: With dead ends: 481 [2023-12-20 14:52:11,249 INFO L226 Difference]: Without dead ends: 351 [2023-12-20 14:52:11,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:52:11,250 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 496 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:11,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 421 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:52:11,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-12-20 14:52:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 272. [2023-12-20 14:52:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 229 states have (on average 1.554585152838428) internal successors, (356), 231 states have internal predecessors, (356), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2023-12-20 14:52:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 417 transitions. [2023-12-20 14:52:11,261 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 417 transitions. Word has length 71 [2023-12-20 14:52:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:11,261 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 417 transitions. [2023-12-20 14:52:11,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 417 transitions. [2023-12-20 14:52:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 14:52:11,262 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:11,262 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] [2023-12-20 14:52:11,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-20 14:52:11,262 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:11,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:11,262 INFO L85 PathProgramCache]: Analyzing trace with hash 993579390, now seen corresponding path program 1 times [2023-12-20 14:52:11,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:11,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999800623] [2023-12-20 14:52:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:11,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:11,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:11,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:11,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:11,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:11,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:11,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:11,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999800623] [2023-12-20 14:52:11,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999800623] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:11,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:11,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:52:11,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820590322] [2023-12-20 14:52:11,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:11,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:52:11,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:11,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:52:11,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:11,338 INFO L87 Difference]: Start difference. First operand 272 states and 417 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:12,181 INFO L93 Difference]: Finished difference Result 786 states and 1223 transitions. [2023-12-20 14:52:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:52:12,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-12-20 14:52:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:12,184 INFO L225 Difference]: With dead ends: 786 [2023-12-20 14:52:12,184 INFO L226 Difference]: Without dead ends: 524 [2023-12-20 14:52:12,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:52:12,185 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 495 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:12,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 781 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:52:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-12-20 14:52:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 395. [2023-12-20 14:52:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 333 states have (on average 1.5465465465465464) internal successors, (515), 336 states have internal predecessors, (515), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2023-12-20 14:52:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 602 transitions. [2023-12-20 14:52:12,201 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 602 transitions. Word has length 71 [2023-12-20 14:52:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:12,202 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 602 transitions. [2023-12-20 14:52:12,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 602 transitions. [2023-12-20 14:52:12,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 14:52:12,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:12,204 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] [2023-12-20 14:52:12,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-20 14:52:12,204 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:12,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1427308476, now seen corresponding path program 1 times [2023-12-20 14:52:12,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:12,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780431234] [2023-12-20 14:52:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:12,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:12,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:12,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:12,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:12,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:12,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:12,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:12,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780431234] [2023-12-20 14:52:12,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780431234] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:12,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:12,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:52:12,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632812800] [2023-12-20 14:52:12,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:12,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:52:12,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:12,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:52:12,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:12,298 INFO L87 Difference]: Start difference. First operand 395 states and 602 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:13,167 INFO L93 Difference]: Finished difference Result 1232 states and 1910 transitions. [2023-12-20 14:52:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:52:13,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-12-20 14:52:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:13,171 INFO L225 Difference]: With dead ends: 1232 [2023-12-20 14:52:13,171 INFO L226 Difference]: Without dead ends: 847 [2023-12-20 14:52:13,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:52:13,172 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 493 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:13,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 779 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:52:13,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2023-12-20 14:52:13,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 642. [2023-12-20 14:52:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 542 states have (on average 1.5387453874538746) internal successors, (834), 547 states have internal predecessors, (834), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2023-12-20 14:52:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 977 transitions. [2023-12-20 14:52:13,201 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 977 transitions. Word has length 71 [2023-12-20 14:52:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:13,201 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 977 transitions. [2023-12-20 14:52:13,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 977 transitions. [2023-12-20 14:52:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 14:52:13,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:13,203 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] [2023-12-20 14:52:13,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-20 14:52:13,203 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:13,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1606741570, now seen corresponding path program 1 times [2023-12-20 14:52:13,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:13,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391152321] [2023-12-20 14:52:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:13,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:13,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:13,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:13,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:13,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:13,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:13,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:13,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391152321] [2023-12-20 14:52:13,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391152321] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:13,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:13,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:52:13,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615383117] [2023-12-20 14:52:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:13,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:52:13,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:52:13,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:13,287 INFO L87 Difference]: Start difference. First operand 642 states and 977 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:14,138 INFO L93 Difference]: Finished difference Result 2091 states and 3233 transitions. [2023-12-20 14:52:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:52:14,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-12-20 14:52:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:14,144 INFO L225 Difference]: With dead ends: 2091 [2023-12-20 14:52:14,144 INFO L226 Difference]: Without dead ends: 1459 [2023-12-20 14:52:14,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:52:14,146 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 489 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:14,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 779 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 14:52:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2023-12-20 14:52:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1137. [2023-12-20 14:52:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 961 states have (on average 1.5317377731529656) internal successors, (1472), 970 states have internal predecessors, (1472), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2023-12-20 14:52:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1733 transitions. [2023-12-20 14:52:14,194 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1733 transitions. Word has length 71 [2023-12-20 14:52:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:14,196 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 1733 transitions. [2023-12-20 14:52:14,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1733 transitions. [2023-12-20 14:52:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 14:52:14,197 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:14,197 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] [2023-12-20 14:52:14,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-20 14:52:14,198 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:14,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:14,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1566066820, now seen corresponding path program 1 times [2023-12-20 14:52:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599839942] [2023-12-20 14:52:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:14,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:14,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:14,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:14,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:14,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:14,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:14,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599839942] [2023-12-20 14:52:14,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599839942] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:14,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:14,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:52:14,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649058532] [2023-12-20 14:52:14,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:14,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:52:14,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:14,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:52:14,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:14,289 INFO L87 Difference]: Start difference. First operand 1137 states and 1733 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:15,263 INFO L93 Difference]: Finished difference Result 4160 states and 6433 transitions. [2023-12-20 14:52:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:52:15,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-12-20 14:52:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:15,285 INFO L225 Difference]: With dead ends: 4160 [2023-12-20 14:52:15,285 INFO L226 Difference]: Without dead ends: 3033 [2023-12-20 14:52:15,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:52:15,291 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 558 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:15,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 526 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:52:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2023-12-20 14:52:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2116. [2023-12-20 14:52:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 1796 states have (on average 1.5289532293986636) internal successors, (2746), 1813 states have internal predecessors, (2746), 201 states have call successors, (201), 102 states have call predecessors, (201), 118 states have return successors, (298), 216 states have call predecessors, (298), 201 states have call successors, (298) [2023-12-20 14:52:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 3245 transitions. [2023-12-20 14:52:15,411 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 3245 transitions. Word has length 71 [2023-12-20 14:52:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:15,412 INFO L495 AbstractCegarLoop]: Abstraction has 2116 states and 3245 transitions. [2023-12-20 14:52:15,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 3245 transitions. [2023-12-20 14:52:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 14:52:15,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:15,420 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] [2023-12-20 14:52:15,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 14:52:15,420 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:15,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash -179281410, now seen corresponding path program 1 times [2023-12-20 14:52:15,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:15,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399735380] [2023-12-20 14:52:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:15,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:15,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:15,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:15,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:15,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:15,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:15,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:15,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399735380] [2023-12-20 14:52:15,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399735380] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:15,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:15,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:52:15,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923868981] [2023-12-20 14:52:15,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:15,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:52:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:15,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:52:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:15,496 INFO L87 Difference]: Start difference. First operand 2116 states and 3245 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:16,526 INFO L93 Difference]: Finished difference Result 7721 states and 11991 transitions. [2023-12-20 14:52:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:52:16,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-12-20 14:52:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:16,550 INFO L225 Difference]: With dead ends: 7721 [2023-12-20 14:52:16,550 INFO L226 Difference]: Without dead ends: 5615 [2023-12-20 14:52:16,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:52:16,559 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 570 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:16,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 768 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:52:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5615 states. [2023-12-20 14:52:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5615 to 3991. [2023-12-20 14:52:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3991 states, 3391 states have (on average 1.5263933942789738) internal successors, (5176), 3424 states have internal predecessors, (5176), 369 states have call successors, (369), 198 states have call predecessors, (369), 230 states have return successors, (644), 400 states have call predecessors, (644), 369 states have call successors, (644) [2023-12-20 14:52:16,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 6189 transitions. [2023-12-20 14:52:16,806 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 6189 transitions. Word has length 71 [2023-12-20 14:52:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:16,807 INFO L495 AbstractCegarLoop]: Abstraction has 3991 states and 6189 transitions. [2023-12-20 14:52:16,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 6189 transitions. [2023-12-20 14:52:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 14:52:16,811 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:16,811 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] [2023-12-20 14:52:16,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-20 14:52:16,811 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:16,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash 696737596, now seen corresponding path program 1 times [2023-12-20 14:52:16,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:16,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691551066] [2023-12-20 14:52:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:16,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:16,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:16,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:16,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:16,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:16,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:16,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:16,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691551066] [2023-12-20 14:52:16,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691551066] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:16,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:16,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:52:16,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383354774] [2023-12-20 14:52:16,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:16,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:52:16,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:16,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:52:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:16,898 INFO L87 Difference]: Start difference. First operand 3991 states and 6189 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:18,083 INFO L93 Difference]: Finished difference Result 13963 states and 21885 transitions. [2023-12-20 14:52:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:52:18,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-12-20 14:52:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:18,134 INFO L225 Difference]: With dead ends: 13963 [2023-12-20 14:52:18,135 INFO L226 Difference]: Without dead ends: 9982 [2023-12-20 14:52:18,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:52:18,152 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 494 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:18,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 772 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:52:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9982 states. [2023-12-20 14:52:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9982 to 7851. [2023-12-20 14:52:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7851 states, 6707 states have (on average 1.529148650663486) internal successors, (10256), 6772 states have internal predecessors, (10256), 689 states have call successors, (689), 390 states have call predecessors, (689), 454 states have return successors, (1482), 752 states have call predecessors, (1482), 689 states have call successors, (1482) [2023-12-20 14:52:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7851 states to 7851 states and 12427 transitions. [2023-12-20 14:52:18,658 INFO L78 Accepts]: Start accepts. Automaton has 7851 states and 12427 transitions. Word has length 71 [2023-12-20 14:52:18,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:18,659 INFO L495 AbstractCegarLoop]: Abstraction has 7851 states and 12427 transitions. [2023-12-20 14:52:18,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 7851 states and 12427 transitions. [2023-12-20 14:52:18,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 14:52:18,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:18,668 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] [2023-12-20 14:52:18,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-20 14:52:18,669 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:18,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2059889670, now seen corresponding path program 1 times [2023-12-20 14:52:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:18,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231208903] [2023-12-20 14:52:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:18,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:18,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:18,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:18,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:18,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:52:18,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:18,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231208903] [2023-12-20 14:52:18,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231208903] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:18,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:52:18,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:52:18,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008580529] [2023-12-20 14:52:18,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:18,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:52:18,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:18,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:52:18,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:18,760 INFO L87 Difference]: Start difference. First operand 7851 states and 12427 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:20,700 INFO L93 Difference]: Finished difference Result 35924 states and 57648 transitions. [2023-12-20 14:52:20,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 14:52:20,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-12-20 14:52:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:20,818 INFO L225 Difference]: With dead ends: 35924 [2023-12-20 14:52:20,818 INFO L226 Difference]: Without dead ends: 28084 [2023-12-20 14:52:20,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-12-20 14:52:20,854 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 1182 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:20,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 655 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 14:52:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28084 states. [2023-12-20 14:52:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28084 to 22830. [2023-12-20 14:52:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22830 states, 19471 states have (on average 1.5138410970160752) internal successors, (29476), 19763 states have internal predecessors, (29476), 1998 states have call successors, (1998), 1168 states have call predecessors, (1998), 1360 states have return successors, (4477), 1962 states have call predecessors, (4477), 1998 states have call successors, (4477) [2023-12-20 14:52:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22830 states to 22830 states and 35951 transitions. [2023-12-20 14:52:22,480 INFO L78 Accepts]: Start accepts. Automaton has 22830 states and 35951 transitions. Word has length 71 [2023-12-20 14:52:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:22,480 INFO L495 AbstractCegarLoop]: Abstraction has 22830 states and 35951 transitions. [2023-12-20 14:52:22,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:52:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 22830 states and 35951 transitions. [2023-12-20 14:52:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-20 14:52:22,534 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:22,534 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 14:52:22,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 14:52:22,534 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:22,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1898980771, now seen corresponding path program 1 times [2023-12-20 14:52:22,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:22,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903754821] [2023-12-20 14:52:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:22,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:22,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:22,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:22,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:22,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:22,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:22,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-12-20 14:52:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:22,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:52:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:22,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-12-20 14:52:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 14:52:22,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:22,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903754821] [2023-12-20 14:52:22,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903754821] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:52:22,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469942895] [2023-12-20 14:52:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:22,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:52:22,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:52:22,646 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) [2023-12-20 14:52:22,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 14:52:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:22,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:52:22,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:52:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-20 14:52:22,870 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:52:22,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469942895] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:22,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:52:22,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-20 14:52:22,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740686202] [2023-12-20 14:52:22,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:22,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:52:22,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:22,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:52:22,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:22,871 INFO L87 Difference]: Start difference. First operand 22830 states and 35951 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:52:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:25,086 INFO L93 Difference]: Finished difference Result 67851 states and 107919 transitions. [2023-12-20 14:52:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:52:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2023-12-20 14:52:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:25,237 INFO L225 Difference]: With dead ends: 67851 [2023-12-20 14:52:25,237 INFO L226 Difference]: Without dead ends: 45032 [2023-12-20 14:52:25,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:25,284 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 165 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:25,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 366 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 14:52:25,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45032 states. [2023-12-20 14:52:27,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45032 to 44834. [2023-12-20 14:52:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44834 states, 38237 states have (on average 1.5078588801422705) internal successors, (57656), 38820 states have internal predecessors, (57656), 3884 states have call successors, (3884), 2328 states have call predecessors, (3884), 2712 states have return successors, (8728), 3749 states have call predecessors, (8728), 3884 states have call successors, (8728) [2023-12-20 14:52:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44834 states to 44834 states and 70268 transitions. [2023-12-20 14:52:27,906 INFO L78 Accepts]: Start accepts. Automaton has 44834 states and 70268 transitions. Word has length 115 [2023-12-20 14:52:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:27,906 INFO L495 AbstractCegarLoop]: Abstraction has 44834 states and 70268 transitions. [2023-12-20 14:52:27,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:52:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 44834 states and 70268 transitions. [2023-12-20 14:52:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-20 14:52:27,993 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:27,994 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 14:52:28,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 14:52:28,201 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,SelfDestructingSolverStorable15 [2023-12-20 14:52:28,201 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:28,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:28,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1669659617, now seen corresponding path program 1 times [2023-12-20 14:52:28,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:28,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162171487] [2023-12-20 14:52:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:28,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:28,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:28,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:28,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:28,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:28,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:28,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-12-20 14:52:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:28,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:52:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:28,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-12-20 14:52:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 14:52:28,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162171487] [2023-12-20 14:52:28,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162171487] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:52:28,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834014165] [2023-12-20 14:52:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:28,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:52:28,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:52:28,335 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) [2023-12-20 14:52:28,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 14:52:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:28,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:52:28,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:52:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 14:52:28,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:52:28,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834014165] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:28,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:52:28,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-20 14:52:28,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38499026] [2023-12-20 14:52:28,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:28,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:52:28,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:28,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:52:28,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:28,518 INFO L87 Difference]: Start difference. First operand 44834 states and 70268 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-20 14:52:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:32,801 INFO L93 Difference]: Finished difference Result 132415 states and 210404 transitions. [2023-12-20 14:52:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:52:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2023-12-20 14:52:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:33,158 INFO L225 Difference]: With dead ends: 132415 [2023-12-20 14:52:33,158 INFO L226 Difference]: Without dead ends: 87593 [2023-12-20 14:52:33,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:33,237 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 182 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:33,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 561 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 14:52:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87593 states. [2023-12-20 14:52:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87593 to 87593. [2023-12-20 14:52:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87593 states, 74737 states have (on average 1.498615143770823) internal successors, (112002), 75705 states have internal predecessors, (112002), 7455 states have call successors, (7455), 4608 states have call predecessors, (7455), 5400 states have return successors, (18801), 7407 states have call predecessors, (18801), 7455 states have call successors, (18801) [2023-12-20 14:52:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87593 states to 87593 states and 138258 transitions. [2023-12-20 14:52:38,456 INFO L78 Accepts]: Start accepts. Automaton has 87593 states and 138258 transitions. Word has length 115 [2023-12-20 14:52:38,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:38,458 INFO L495 AbstractCegarLoop]: Abstraction has 87593 states and 138258 transitions. [2023-12-20 14:52:38,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-20 14:52:38,458 INFO L276 IsEmpty]: Start isEmpty. Operand 87593 states and 138258 transitions. [2023-12-20 14:52:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-20 14:52:38,683 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:38,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:52:38,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 14:52:38,894 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,SelfDestructingSolverStorable16 [2023-12-20 14:52:38,895 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:38,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash -689746481, now seen corresponding path program 1 times [2023-12-20 14:52:38,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:38,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032868311] [2023-12-20 14:52:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:38,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:38,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-12-20 14:52:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:52:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-12-20 14:52:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:52:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2023-12-20 14:52:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-20 14:52:39,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:39,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032868311] [2023-12-20 14:52:39,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032868311] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:52:39,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630066941] [2023-12-20 14:52:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:39,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:52:39,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:52:39,299 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) [2023-12-20 14:52:39,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 14:52:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:39,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:52:39,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:52:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 14:52:39,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:52:39,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630066941] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:39,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:52:39,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-20 14:52:39,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603231885] [2023-12-20 14:52:39,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:39,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:52:39,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:52:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:39,559 INFO L87 Difference]: Start difference. First operand 87593 states and 138258 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-20 14:52:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:52:44,511 INFO L93 Difference]: Finished difference Result 162255 states and 257536 transitions. [2023-12-20 14:52:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:52:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 148 [2023-12-20 14:52:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:52:45,185 INFO L225 Difference]: With dead ends: 162255 [2023-12-20 14:52:45,196 INFO L226 Difference]: Without dead ends: 117267 [2023-12-20 14:52:45,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:45,332 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 119 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:52:45,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 367 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 14:52:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117267 states. [2023-12-20 14:52:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117267 to 116609. [2023-12-20 14:52:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116609 states, 99553 states have (on average 1.4989201731740882) internal successors, (149222), 100843 states have internal predecessors, (149222), 9863 states have call successors, (9863), 6144 states have call predecessors, (9863), 7192 states have return successors, (24056), 9749 states have call predecessors, (24056), 9863 states have call successors, (24056) [2023-12-20 14:52:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116609 states to 116609 states and 183141 transitions. [2023-12-20 14:52:51,637 INFO L78 Accepts]: Start accepts. Automaton has 116609 states and 183141 transitions. Word has length 148 [2023-12-20 14:52:51,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:52:51,638 INFO L495 AbstractCegarLoop]: Abstraction has 116609 states and 183141 transitions. [2023-12-20 14:52:51,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-20 14:52:51,638 INFO L276 IsEmpty]: Start isEmpty. Operand 116609 states and 183141 transitions. [2023-12-20 14:52:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-20 14:52:52,158 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:52:52,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:52:52,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 14:52:52,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 14:52:52,366 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:52:52,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:52:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash 435513488, now seen corresponding path program 1 times [2023-12-20 14:52:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:52:52,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679430527] [2023-12-20 14:52:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:52,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:52:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:52:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:52:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:52:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:52:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:52:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-12-20 14:52:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:52:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-12-20 14:52:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:52:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2023-12-20 14:52:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-20 14:52:52,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:52:52,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679430527] [2023-12-20 14:52:52,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679430527] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:52:52,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600324622] [2023-12-20 14:52:52,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:52:52,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:52:52,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:52:52,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 14:52:52,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 14:52:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:52:52,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:52:52,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:52:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 14:52:52,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:52:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600324622] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:52:52,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:52:52,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-20 14:52:52,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618864588] [2023-12-20 14:52:52,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:52:52,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:52:52,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:52:52,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:52:52,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:52:52,714 INFO L87 Difference]: Start difference. First operand 116609 states and 183141 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-20 14:53:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:53:02,847 INFO L93 Difference]: Finished difference Result 346229 states and 549475 transitions. [2023-12-20 14:53:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:53:02,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 148 [2023-12-20 14:53:02,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:53:04,025 INFO L225 Difference]: With dead ends: 346229 [2023-12-20 14:53:04,025 INFO L226 Difference]: Without dead ends: 229637 [2023-12-20 14:53:04,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:53:04,266 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 123 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:53:04,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 367 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 14:53:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229637 states. [2023-12-20 14:53:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229637 to 228587. [2023-12-20 14:53:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228587 states, 195290 states have (on average 1.4925444211173127) internal successors, (291479), 197868 states have internal predecessors, (291479), 19035 states have call successors, (19035), 12140 states have call predecessors, (19035), 14261 states have return successors, (46394), 18706 states have call predecessors, (46394), 19035 states have call successors, (46394) [2023-12-20 14:53:17,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228587 states to 228587 states and 356908 transitions. [2023-12-20 14:53:17,192 INFO L78 Accepts]: Start accepts. Automaton has 228587 states and 356908 transitions. Word has length 148 [2023-12-20 14:53:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:53:17,192 INFO L495 AbstractCegarLoop]: Abstraction has 228587 states and 356908 transitions. [2023-12-20 14:53:17,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-20 14:53:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 228587 states and 356908 transitions. [2023-12-20 14:53:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-12-20 14:53:18,063 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:53:18,063 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:53:18,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-20 14:53:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:53:18,269 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:53:18,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:53:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1638728650, now seen corresponding path program 1 times [2023-12-20 14:53:18,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:53:18,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837913912] [2023-12-20 14:53:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:53:18,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:53:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:53:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-20 14:53:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:53:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-20 14:53:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-20 14:53:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-12-20 14:53:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-12-20 14:53:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:53:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-12-20 14:53:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:53:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-12-20 14:53:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-20 14:53:18,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:53:18,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837913912] [2023-12-20 14:53:18,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837913912] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:53:18,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43460053] [2023-12-20 14:53:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:53:18,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:53:18,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:53:18,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 14:53:18,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 14:53:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:53:18,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:53:18,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:53:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-20 14:53:18,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:53:18,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43460053] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:53:18,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:53:18,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-20 14:53:18,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523792484] [2023-12-20 14:53:18,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:53:18,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:53:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:53:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:53:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:53:18,533 INFO L87 Difference]: Start difference. First operand 228587 states and 356908 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10)