/usr/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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:11:33,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:11:33,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:11:33,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 20:11:33,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 20:11:33,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 20:11:33,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 20:11:33,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 20:11:33,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 20:11:33,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 20:11:33,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 20:11:33,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 20:11:33,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:11:33,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:11:33,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:11:33,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:11:33,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:11:33,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:11:33,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:11:33,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:11:33,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:11:33,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:11:33,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:11:33,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:11:33,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 20:11:33,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 20:11:33,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 20:11:33,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 20:11:33,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 20:11:33,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 20:11:33,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 20:11:33,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 20:11:33,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 20:11:33,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 20:11:33,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 20:11:33,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 20:11:33,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 20:11:33,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 20:11:33,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:11:33,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:11:33,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:11:33,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 20:11:33,242 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:11:33,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:11:33,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:11:33,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:11:33,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:11:33,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:11:33,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:11:33,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:11:33,245 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:11:33,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:11:33,246 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:11:33,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:11:33,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:11:33,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:11:33,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:11:33,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:11:33,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:11:33,247 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:11:33,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:11:33,247 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:11:33,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:11:33,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:11:33,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:11:33,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:11:33,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:11:33,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:11:33,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:11:33,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:11:33,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:11:33,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:11:33,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:11:33,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:11:33,249 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:11:33,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:11:33,249 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:11:33,249 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:11:33,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:11:33,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:11:33,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:11:33,458 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:11:33,458 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:11:33,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2023-04-01 20:11:34,606 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:11:34,843 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:11:34,844 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2023-04-01 20:11:34,850 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b7fc9e1d/eaa7e2112f8744f2aebf49278dfcc5c7/FLAG740c1f087 [2023-04-01 20:11:34,862 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b7fc9e1d/eaa7e2112f8744f2aebf49278dfcc5c7 [2023-04-01 20:11:34,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:11:34,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:11:34,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:11:34,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:11:34,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:11:34,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:11:34" (1/1) ... [2023-04-01 20:11:34,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e2c8fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:34, skipping insertion in model container [2023-04-01 20:11:34,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:11:34" (1/1) ... [2023-04-01 20:11:34,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:11:34,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:11:35,030 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2023-04-01 20:11:35,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:11:35,081 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:11:35,091 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2023-04-01 20:11:35,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:11:35,135 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:11:35,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35 WrapperNode [2023-04-01 20:11:35,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:11:35,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:11:35,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:11:35,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:11:35,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35" (1/1) ... [2023-04-01 20:11:35,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35" (1/1) ... [2023-04-01 20:11:35,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35" (1/1) ... [2023-04-01 20:11:35,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35" (1/1) ... [2023-04-01 20:11:35,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35" (1/1) ... [2023-04-01 20:11:35,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35" (1/1) ... [2023-04-01 20:11:35,174 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35" (1/1) ... [2023-04-01 20:11:35,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35" (1/1) ... [2023-04-01 20:11:35,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:11:35,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:11:35,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:11:35,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:11:35,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35" (1/1) ... [2023-04-01 20:11:35,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:11:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:35,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 20:11:35,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 20:11:35,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:11:35,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:11:35,240 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:11:35,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 20:11:35,241 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-04-01 20:11:35,241 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-04-01 20:11:35,241 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2023-04-01 20:11:35,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:11:35,245 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:11:35,245 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:11:35,245 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:11:35,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:11:35,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 20:11:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 20:11:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 20:11:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-04-01 20:11:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-04-01 20:11:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2023-04-01 20:11:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:11:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:11:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:11:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:11:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:11:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:11:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:11:35,320 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:11:35,322 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:11:35,875 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:11:35,886 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:11:35,886 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 20:11:35,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:11:35 BoogieIcfgContainer [2023-04-01 20:11:35,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:11:35,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:11:35,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:11:35,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:11:35,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:11:34" (1/3) ... [2023-04-01 20:11:35,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0bc60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:11:35, skipping insertion in model container [2023-04-01 20:11:35,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:11:35" (2/3) ... [2023-04-01 20:11:35,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0bc60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:11:35, skipping insertion in model container [2023-04-01 20:11:35,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:11:35" (3/3) ... [2023-04-01 20:11:35,901 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2023-04-01 20:11:35,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:11:35,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:11:35,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:11:35,982 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=LoopsAndPotentialCycles, 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;@4094918e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:11:35,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:11:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 90 states have (on average 1.6111111111111112) internal successors, (145), 93 states have internal predecessors, (145), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 20:11:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 20:11:35,996 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:35,996 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:35,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:36,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:36,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2115383129, now seen corresponding path program 1 times [2023-04-01 20:11:36,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:36,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573557151] [2023-04-01 20:11:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:36,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:36,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:36,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:36,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:36,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:36,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573557151] [2023-04-01 20:11:36,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573557151] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:36,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402164825] [2023-04-01 20:11:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:36,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:36,755 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) [2023-04-01 20:11:36,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:11:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:36,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 20:11:36,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:11:37,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:11:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:37,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402164825] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:11:37,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:11:37,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 19 [2023-04-01 20:11:37,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551686877] [2023-04-01 20:11:37,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:11:37,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 20:11:37,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:37,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 20:11:37,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-04-01 20:11:37,265 INFO L87 Difference]: Start difference. First operand has 110 states, 90 states have (on average 1.6111111111111112) internal successors, (145), 93 states have internal predecessors, (145), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:11:39,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:39,020 INFO L93 Difference]: Finished difference Result 264 states and 430 transitions. [2023-04-01 20:11:39,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 20:11:39,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 41 [2023-04-01 20:11:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:39,032 INFO L225 Difference]: With dead ends: 264 [2023-04-01 20:11:39,032 INFO L226 Difference]: Without dead ends: 166 [2023-04-01 20:11:39,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 20:11:39,039 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 344 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:39,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 94 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:11:39,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-04-01 20:11:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2023-04-01 20:11:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 107 states have (on average 1.4672897196261683) internal successors, (157), 110 states have internal predecessors, (157), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2023-04-01 20:11:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 191 transitions. [2023-04-01 20:11:39,092 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 191 transitions. Word has length 41 [2023-04-01 20:11:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:39,093 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 191 transitions. [2023-04-01 20:11:39,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:11:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 191 transitions. [2023-04-01 20:11:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 20:11:39,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:39,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:39,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 20:11:39,302 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,SelfDestructingSolverStorable0 [2023-04-01 20:11:39,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:39,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2049200938, now seen corresponding path program 1 times [2023-04-01 20:11:39,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:39,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130863737] [2023-04-01 20:11:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:39,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:39,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:39,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130863737] [2023-04-01 20:11:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130863737] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609005085] [2023-04-01 20:11:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:39,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:39,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:39,526 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) [2023-04-01 20:11:39,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:11:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:39,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 20:11:39,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:11:39,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:11:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:40,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609005085] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:11:40,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:11:40,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 22 [2023-04-01 20:11:40,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388885024] [2023-04-01 20:11:40,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:11:40,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 20:11:40,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 20:11:40,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2023-04-01 20:11:40,058 INFO L87 Difference]: Start difference. First operand 130 states and 191 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 20:11:41,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:41,807 INFO L93 Difference]: Finished difference Result 307 states and 468 transitions. [2023-04-01 20:11:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 20:11:41,808 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45 [2023-04-01 20:11:41,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:41,810 INFO L225 Difference]: With dead ends: 307 [2023-04-01 20:11:41,810 INFO L226 Difference]: Without dead ends: 223 [2023-04-01 20:11:41,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 20:11:41,813 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 487 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:41,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 72 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:11:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-04-01 20:11:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 158. [2023-04-01 20:11:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 130 states have (on average 1.4153846153846155) internal successors, (184), 134 states have internal predecessors, (184), 19 states have call successors, (19), 7 states have call predecessors, (19), 8 states have return successors, (29), 19 states have call predecessors, (29), 17 states have call successors, (29) [2023-04-01 20:11:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 232 transitions. [2023-04-01 20:11:41,833 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 232 transitions. Word has length 45 [2023-04-01 20:11:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:41,833 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 232 transitions. [2023-04-01 20:11:41,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 20:11:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 232 transitions. [2023-04-01 20:11:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 20:11:41,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:41,835 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:41,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:11:42,044 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,SelfDestructingSolverStorable1 [2023-04-01 20:11:42,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:42,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1508452618, now seen corresponding path program 1 times [2023-04-01 20:11:42,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:42,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245979964] [2023-04-01 20:11:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:42,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:42,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:42,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245979964] [2023-04-01 20:11:42,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245979964] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:42,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:42,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 20:11:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067249634] [2023-04-01 20:11:42,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:42,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 20:11:42,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:42,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 20:11:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:11:42,201 INFO L87 Difference]: Start difference. First operand 158 states and 232 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:42,723 INFO L93 Difference]: Finished difference Result 341 states and 505 transitions. [2023-04-01 20:11:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 20:11:42,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-04-01 20:11:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:42,726 INFO L225 Difference]: With dead ends: 341 [2023-04-01 20:11:42,726 INFO L226 Difference]: Without dead ends: 245 [2023-04-01 20:11:42,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:11:42,728 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 209 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:42,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 37 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 20:11:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-04-01 20:11:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2023-04-01 20:11:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 202 states have (on average 1.3712871287128714) internal successors, (277), 206 states have internal predecessors, (277), 28 states have call successors, (28), 9 states have call predecessors, (28), 10 states have return successors, (38), 31 states have call predecessors, (38), 26 states have call successors, (38) [2023-04-01 20:11:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 343 transitions. [2023-04-01 20:11:42,768 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 343 transitions. Word has length 49 [2023-04-01 20:11:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:42,769 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 343 transitions. [2023-04-01 20:11:42,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 343 transitions. [2023-04-01 20:11:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 20:11:42,777 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:42,777 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:42,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:11:42,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:42,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1754203168, now seen corresponding path program 1 times [2023-04-01 20:11:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432670514] [2023-04-01 20:11:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 20:11:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:42,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:42,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432670514] [2023-04-01 20:11:42,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432670514] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:42,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:42,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:11:42,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972406281] [2023-04-01 20:11:42,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:42,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:11:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:11:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:42,898 INFO L87 Difference]: Start difference. First operand 241 states and 343 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:11:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:43,176 INFO L93 Difference]: Finished difference Result 293 states and 421 transitions. [2023-04-01 20:11:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:11:43,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2023-04-01 20:11:43,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:43,178 INFO L225 Difference]: With dead ends: 293 [2023-04-01 20:11:43,178 INFO L226 Difference]: Without dead ends: 251 [2023-04-01 20:11:43,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:11:43,179 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 189 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:43,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 17 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:43,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-04-01 20:11:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 221. [2023-04-01 20:11:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 186 states have (on average 1.3440860215053763) internal successors, (250), 188 states have internal predecessors, (250), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (34), 27 states have call predecessors, (34), 22 states have call successors, (34) [2023-04-01 20:11:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 308 transitions. [2023-04-01 20:11:43,204 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 308 transitions. Word has length 50 [2023-04-01 20:11:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:43,205 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 308 transitions. [2023-04-01 20:11:43,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:11:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 308 transitions. [2023-04-01 20:11:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 20:11:43,206 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:43,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:43,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 20:11:43,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:43,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash 60029974, now seen corresponding path program 1 times [2023-04-01 20:11:43,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:43,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426377369] [2023-04-01 20:11:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:43,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 20:11:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:43,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:43,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426377369] [2023-04-01 20:11:43,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426377369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:43,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:43,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:11:43,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966758977] [2023-04-01 20:11:43,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:43,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:11:43,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:43,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:11:43,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:43,288 INFO L87 Difference]: Start difference. First operand 221 states and 308 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:43,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:43,540 INFO L93 Difference]: Finished difference Result 238 states and 329 transitions. [2023-04-01 20:11:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:11:43,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2023-04-01 20:11:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:43,542 INFO L225 Difference]: With dead ends: 238 [2023-04-01 20:11:43,543 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 20:11:43,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:11:43,544 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 138 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:43,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 17 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:43,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 20:11:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2023-04-01 20:11:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 190 states have (on average 1.3368421052631578) internal successors, (254), 192 states have internal predecessors, (254), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (34), 27 states have call predecessors, (34), 22 states have call successors, (34) [2023-04-01 20:11:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 312 transitions. [2023-04-01 20:11:43,561 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 312 transitions. Word has length 51 [2023-04-01 20:11:43,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:43,561 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 312 transitions. [2023-04-01 20:11:43,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 312 transitions. [2023-04-01 20:11:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 20:11:43,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:43,562 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:43,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 20:11:43,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:43,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:43,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1835037336, now seen corresponding path program 1 times [2023-04-01 20:11:43,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:43,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267901293] [2023-04-01 20:11:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:43,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 20:11:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:43,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:43,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267901293] [2023-04-01 20:11:43,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267901293] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:43,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:43,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:11:43,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130328173] [2023-04-01 20:11:43,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:43,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 20:11:43,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:43,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 20:11:43,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 20:11:43,625 INFO L87 Difference]: Start difference. First operand 225 states and 312 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:43,923 INFO L93 Difference]: Finished difference Result 232 states and 318 transitions. [2023-04-01 20:11:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:11:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2023-04-01 20:11:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:43,925 INFO L225 Difference]: With dead ends: 232 [2023-04-01 20:11:43,925 INFO L226 Difference]: Without dead ends: 225 [2023-04-01 20:11:43,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:11:43,927 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:43,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 22 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:11:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-04-01 20:11:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 221. [2023-04-01 20:11:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 186 states have (on average 1.3279569892473118) internal successors, (247), 188 states have internal predecessors, (247), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (34), 27 states have call predecessors, (34), 22 states have call successors, (34) [2023-04-01 20:11:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 305 transitions. [2023-04-01 20:11:43,944 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 305 transitions. Word has length 51 [2023-04-01 20:11:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:43,944 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 305 transitions. [2023-04-01 20:11:43,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 305 transitions. [2023-04-01 20:11:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 20:11:43,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:43,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:43,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 20:11:43,946 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:43,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 195390509, now seen corresponding path program 1 times [2023-04-01 20:11:43,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:43,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704518215] [2023-04-01 20:11:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:43,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:43,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 20:11:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:44,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:44,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704518215] [2023-04-01 20:11:44,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704518215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:44,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:44,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:11:44,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642772934] [2023-04-01 20:11:44,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:44,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:11:44,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:11:44,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:44,006 INFO L87 Difference]: Start difference. First operand 221 states and 305 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:11:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:44,289 INFO L93 Difference]: Finished difference Result 311 states and 436 transitions. [2023-04-01 20:11:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:11:44,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-04-01 20:11:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:44,292 INFO L225 Difference]: With dead ends: 311 [2023-04-01 20:11:44,292 INFO L226 Difference]: Without dead ends: 247 [2023-04-01 20:11:44,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:11:44,293 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 188 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:44,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 17 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-04-01 20:11:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 215. [2023-04-01 20:11:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 182 states have (on average 1.3076923076923077) internal successors, (238), 182 states have internal predecessors, (238), 22 states have call successors, (22), 9 states have call predecessors, (22), 10 states have return successors, (32), 25 states have call predecessors, (32), 20 states have call successors, (32) [2023-04-01 20:11:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 292 transitions. [2023-04-01 20:11:44,309 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 292 transitions. Word has length 52 [2023-04-01 20:11:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:44,309 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 292 transitions. [2023-04-01 20:11:44,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 20:11:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 292 transitions. [2023-04-01 20:11:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 20:11:44,310 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:44,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:44,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 20:11:44,311 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:44,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:44,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1086993319, now seen corresponding path program 2 times [2023-04-01 20:11:44,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:44,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207012721] [2023-04-01 20:11:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:44,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:11:44,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:44,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207012721] [2023-04-01 20:11:44,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207012721] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:44,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391054430] [2023-04-01 20:11:44,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:11:44,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:44,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:44,529 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) [2023-04-01 20:11:44,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:11:44,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-04-01 20:11:44,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:11:44,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 20:11:44,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:11:44,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:11:44,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391054430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:44,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:11:44,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 14 [2023-04-01 20:11:44,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187846459] [2023-04-01 20:11:44,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:44,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:11:44,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:11:44,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:11:44,772 INFO L87 Difference]: Start difference. First operand 215 states and 292 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:45,026 INFO L93 Difference]: Finished difference Result 427 states and 603 transitions. [2023-04-01 20:11:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:11:45,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2023-04-01 20:11:45,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:45,028 INFO L225 Difference]: With dead ends: 427 [2023-04-01 20:11:45,028 INFO L226 Difference]: Without dead ends: 348 [2023-04-01 20:11:45,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:11:45,029 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 166 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:45,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1461 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-04-01 20:11:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 322. [2023-04-01 20:11:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 276 states have (on average 1.3224637681159421) internal successors, (365), 275 states have internal predecessors, (365), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2023-04-01 20:11:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 441 transitions. [2023-04-01 20:11:45,055 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 441 transitions. Word has length 53 [2023-04-01 20:11:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:45,055 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 441 transitions. [2023-04-01 20:11:45,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:45,056 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 441 transitions. [2023-04-01 20:11:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 20:11:45,057 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:45,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:45,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:11:45,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:45,263 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:45,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:45,263 INFO L85 PathProgramCache]: Analyzing trace with hash 693966309, now seen corresponding path program 1 times [2023-04-01 20:11:45,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:45,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826185423] [2023-04-01 20:11:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:45,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:11:45,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:45,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826185423] [2023-04-01 20:11:45,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826185423] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:45,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83237783] [2023-04-01 20:11:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:45,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:45,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:45,482 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) [2023-04-01 20:11:45,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:11:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:45,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 20:11:45,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 20:11:45,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:11:45,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83237783] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:45,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:11:45,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10] total 18 [2023-04-01 20:11:45,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604098360] [2023-04-01 20:11:45,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:45,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 20:11:45,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:45,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 20:11:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:11:45,914 INFO L87 Difference]: Start difference. First operand 322 states and 441 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 20:11:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:46,337 INFO L93 Difference]: Finished difference Result 426 states and 582 transitions. [2023-04-01 20:11:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 20:11:46,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-04-01 20:11:46,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:46,339 INFO L225 Difference]: With dead ends: 426 [2023-04-01 20:11:46,340 INFO L226 Difference]: Without dead ends: 370 [2023-04-01 20:11:46,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-04-01 20:11:46,341 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 189 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:46,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1586 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:11:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-04-01 20:11:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 353. [2023-04-01 20:11:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 303 states have (on average 1.3267326732673268) internal successors, (402), 302 states have internal predecessors, (402), 35 states have call successors, (35), 13 states have call predecessors, (35), 14 states have return successors, (45), 41 states have call predecessors, (45), 33 states have call successors, (45) [2023-04-01 20:11:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 482 transitions. [2023-04-01 20:11:46,370 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 482 transitions. Word has length 53 [2023-04-01 20:11:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:46,371 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 482 transitions. [2023-04-01 20:11:46,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 20:11:46,371 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 482 transitions. [2023-04-01 20:11:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 20:11:46,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:46,373 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:46,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 20:11:46,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:46,579 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:46,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:46,579 INFO L85 PathProgramCache]: Analyzing trace with hash -739975295, now seen corresponding path program 1 times [2023-04-01 20:11:46,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:46,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839439128] [2023-04-01 20:11:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:46,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 20:11:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:46,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:46,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839439128] [2023-04-01 20:11:46,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839439128] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:46,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126489541] [2023-04-01 20:11:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:46,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:46,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:46,828 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) [2023-04-01 20:11:46,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:11:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:46,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 20:11:46,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:46,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:11:46,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126489541] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:46,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:11:46,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 14 [2023-04-01 20:11:46,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220416895] [2023-04-01 20:11:46,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:46,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:11:46,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:11:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:11:46,956 INFO L87 Difference]: Start difference. First operand 353 states and 482 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:47,110 INFO L93 Difference]: Finished difference Result 559 states and 792 transitions. [2023-04-01 20:11:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:11:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2023-04-01 20:11:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:47,113 INFO L225 Difference]: With dead ends: 559 [2023-04-01 20:11:47,113 INFO L226 Difference]: Without dead ends: 501 [2023-04-01 20:11:47,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-04-01 20:11:47,115 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 59 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:47,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 722 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 20:11:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-04-01 20:11:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 414. [2023-04-01 20:11:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 355 states have (on average 1.3183098591549296) internal successors, (468), 355 states have internal predecessors, (468), 40 states have call successors, (40), 13 states have call predecessors, (40), 18 states have return successors, (59), 51 states have call predecessors, (59), 38 states have call successors, (59) [2023-04-01 20:11:47,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 567 transitions. [2023-04-01 20:11:47,142 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 567 transitions. Word has length 55 [2023-04-01 20:11:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:47,142 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 567 transitions. [2023-04-01 20:11:47,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:47,143 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 567 transitions. [2023-04-01 20:11:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 20:11:47,144 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:47,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:11:47,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 20:11:47,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 20:11:47,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:47,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash -38910717, now seen corresponding path program 1 times [2023-04-01 20:11:47,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:47,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171602419] [2023-04-01 20:11:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:47,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 20:11:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:47,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:47,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171602419] [2023-04-01 20:11:47,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171602419] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:47,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:47,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:11:47,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860460238] [2023-04-01 20:11:47,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:47,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:11:47,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:11:47,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:47,400 INFO L87 Difference]: Start difference. First operand 414 states and 567 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:47,654 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2023-04-01 20:11:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:11:47,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2023-04-01 20:11:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:47,656 INFO L225 Difference]: With dead ends: 431 [2023-04-01 20:11:47,656 INFO L226 Difference]: Without dead ends: 349 [2023-04-01 20:11:47,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:11:47,657 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:47,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 17 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-04-01 20:11:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2023-04-01 20:11:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 294 states have (on average 1.3299319727891157) internal successors, (391), 298 states have internal predecessors, (391), 37 states have call successors, (37), 11 states have call predecessors, (37), 15 states have return successors, (44), 41 states have call predecessors, (44), 34 states have call successors, (44) [2023-04-01 20:11:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 472 transitions. [2023-04-01 20:11:47,679 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 472 transitions. Word has length 55 [2023-04-01 20:11:47,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:47,679 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 472 transitions. [2023-04-01 20:11:47,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 472 transitions. [2023-04-01 20:11:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 20:11:47,681 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:47,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:47,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 20:11:47,681 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:47,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:47,681 INFO L85 PathProgramCache]: Analyzing trace with hash -363981056, now seen corresponding path program 1 times [2023-04-01 20:11:47,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:47,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880322558] [2023-04-01 20:11:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:47,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:11:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:47,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880322558] [2023-04-01 20:11:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880322558] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:47,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:47,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:11:47,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665485423] [2023-04-01 20:11:47,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:47,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:11:47,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:47,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:11:47,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:11:47,728 INFO L87 Difference]: Start difference. First operand 347 states and 472 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:47,932 INFO L93 Difference]: Finished difference Result 628 states and 858 transitions. [2023-04-01 20:11:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 20:11:47,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2023-04-01 20:11:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:47,934 INFO L225 Difference]: With dead ends: 628 [2023-04-01 20:11:47,934 INFO L226 Difference]: Without dead ends: 360 [2023-04-01 20:11:47,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:47,936 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:47,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 12 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-04-01 20:11:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 350. [2023-04-01 20:11:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 297 states have (on average 1.32996632996633) internal successors, (395), 301 states have internal predecessors, (395), 37 states have call successors, (37), 11 states have call predecessors, (37), 15 states have return successors, (44), 41 states have call predecessors, (44), 34 states have call successors, (44) [2023-04-01 20:11:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 476 transitions. [2023-04-01 20:11:47,955 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 476 transitions. Word has length 56 [2023-04-01 20:11:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:47,955 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 476 transitions. [2023-04-01 20:11:47,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 476 transitions. [2023-04-01 20:11:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 20:11:47,957 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:47,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:47,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 20:11:47,957 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:47,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:47,957 INFO L85 PathProgramCache]: Analyzing trace with hash 927103868, now seen corresponding path program 1 times [2023-04-01 20:11:47,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:47,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750572593] [2023-04-01 20:11:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:47,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:11:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 20:11:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:11:48,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:48,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750572593] [2023-04-01 20:11:48,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750572593] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:48,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:48,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 20:11:48,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147133428] [2023-04-01 20:11:48,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:48,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:11:48,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:11:48,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:11:48,187 INFO L87 Difference]: Start difference. First operand 350 states and 476 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:49,067 INFO L93 Difference]: Finished difference Result 508 states and 718 transitions. [2023-04-01 20:11:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:11:49,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2023-04-01 20:11:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:49,070 INFO L225 Difference]: With dead ends: 508 [2023-04-01 20:11:49,071 INFO L226 Difference]: Without dead ends: 477 [2023-04-01 20:11:49,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-04-01 20:11:49,073 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 283 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:49,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 42 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:11:49,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-04-01 20:11:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 428. [2023-04-01 20:11:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 363 states have (on average 1.3443526170798898) internal successors, (488), 366 states have internal predecessors, (488), 47 states have call successors, (47), 11 states have call predecessors, (47), 17 states have return successors, (60), 56 states have call predecessors, (60), 44 states have call successors, (60) [2023-04-01 20:11:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 595 transitions. [2023-04-01 20:11:49,103 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 595 transitions. Word has length 57 [2023-04-01 20:11:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:49,104 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 595 transitions. [2023-04-01 20:11:49,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:11:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 595 transitions. [2023-04-01 20:11:49,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 20:11:49,107 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:49,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:49,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 20:11:49,107 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:49,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1013040796, now seen corresponding path program 1 times [2023-04-01 20:11:49,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:49,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729095134] [2023-04-01 20:11:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:49,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:49,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:49,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729095134] [2023-04-01 20:11:49,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729095134] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:49,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:49,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:11:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754614767] [2023-04-01 20:11:49,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:49,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:11:49,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:49,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:11:49,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:11:49,162 INFO L87 Difference]: Start difference. First operand 428 states and 595 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:49,380 INFO L93 Difference]: Finished difference Result 780 states and 1089 transitions. [2023-04-01 20:11:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 20:11:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2023-04-01 20:11:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:49,383 INFO L225 Difference]: With dead ends: 780 [2023-04-01 20:11:49,383 INFO L226 Difference]: Without dead ends: 431 [2023-04-01 20:11:49,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:11:49,385 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:49,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 12 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:11:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-04-01 20:11:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 430. [2023-04-01 20:11:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 365 states have (on average 1.3424657534246576) internal successors, (490), 368 states have internal predecessors, (490), 47 states have call successors, (47), 11 states have call predecessors, (47), 17 states have return successors, (60), 56 states have call predecessors, (60), 44 states have call successors, (60) [2023-04-01 20:11:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 597 transitions. [2023-04-01 20:11:49,412 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 597 transitions. Word has length 57 [2023-04-01 20:11:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:49,412 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 597 transitions. [2023-04-01 20:11:49,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:49,412 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 597 transitions. [2023-04-01 20:11:49,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 20:11:49,413 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:49,413 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:49,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 20:11:49,414 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:49,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1075080410, now seen corresponding path program 1 times [2023-04-01 20:11:49,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:49,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083059971] [2023-04-01 20:11:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:49,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:49,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:49,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083059971] [2023-04-01 20:11:49,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083059971] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:49,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057232444] [2023-04-01 20:11:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:49,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:49,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:11:49,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:11:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:49,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 20:11:49,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:49,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:11:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:49,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057232444] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:11:49,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:11:49,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-04-01 20:11:49,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937514675] [2023-04-01 20:11:49,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:11:49,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:11:49,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:11:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:11:49,769 INFO L87 Difference]: Start difference. First operand 430 states and 597 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:11:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:50,798 INFO L93 Difference]: Finished difference Result 548 states and 758 transitions. [2023-04-01 20:11:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 20:11:50,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2023-04-01 20:11:50,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:50,801 INFO L225 Difference]: With dead ends: 548 [2023-04-01 20:11:50,801 INFO L226 Difference]: Without dead ends: 475 [2023-04-01 20:11:50,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-04-01 20:11:50,802 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 224 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:50,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 57 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 20:11:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-04-01 20:11:50,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 446. [2023-04-01 20:11:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 379 states have (on average 1.345646437994723) internal successors, (510), 384 states have internal predecessors, (510), 47 states have call successors, (47), 12 states have call predecessors, (47), 19 states have return successors, (58), 55 states have call predecessors, (58), 44 states have call successors, (58) [2023-04-01 20:11:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 615 transitions. [2023-04-01 20:11:50,830 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 615 transitions. Word has length 57 [2023-04-01 20:11:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:50,830 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 615 transitions. [2023-04-01 20:11:50,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:11:50,830 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 615 transitions. [2023-04-01 20:11:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 20:11:50,832 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:50,832 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:50,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 20:11:51,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 20:11:51,040 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:51,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash 682053400, now seen corresponding path program 1 times [2023-04-01 20:11:51,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:51,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958717597] [2023-04-01 20:11:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:51,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:11:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:11:51,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958717597] [2023-04-01 20:11:51,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958717597] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800220499] [2023-04-01 20:11:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:51,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:51,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:11:51,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 20:11:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:51,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 20:11:51,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:11:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:52,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:11:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:52,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800220499] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:11:52,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:11:52,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 32 [2023-04-01 20:11:52,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934741136] [2023-04-01 20:11:52,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:11:52,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 20:11:52,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:52,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 20:11:52,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=922, Unknown=0, NotChecked=0, Total=992 [2023-04-01 20:11:52,258 INFO L87 Difference]: Start difference. First operand 446 states and 615 transitions. Second operand has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 23 states have internal predecessors, (86), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:11:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:56,067 INFO L93 Difference]: Finished difference Result 738 states and 1027 transitions. [2023-04-01 20:11:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 20:11:56,068 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 23 states have internal predecessors, (86), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 57 [2023-04-01 20:11:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:56,071 INFO L225 Difference]: With dead ends: 738 [2023-04-01 20:11:56,071 INFO L226 Difference]: Without dead ends: 615 [2023-04-01 20:11:56,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=3011, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 20:11:56,073 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 584 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6807 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 6881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 6807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:56,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 117 Invalid, 6881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 6807 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 20:11:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-04-01 20:11:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 497. [2023-04-01 20:11:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 422 states have (on average 1.3341232227488151) internal successors, (563), 430 states have internal predecessors, (563), 51 states have call successors, (51), 14 states have call predecessors, (51), 23 states have return successors, (67), 58 states have call predecessors, (67), 48 states have call successors, (67) [2023-04-01 20:11:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 681 transitions. [2023-04-01 20:11:56,111 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 681 transitions. Word has length 57 [2023-04-01 20:11:56,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:56,111 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 681 transitions. [2023-04-01 20:11:56,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 23 states have internal predecessors, (86), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:11:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 681 transitions. [2023-04-01 20:11:56,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 20:11:56,112 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:56,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:56,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 20:11:56,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:56,318 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:56,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:56,318 INFO L85 PathProgramCache]: Analyzing trace with hash 161198418, now seen corresponding path program 2 times [2023-04-01 20:11:56,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:56,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119925539] [2023-04-01 20:11:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:56,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:56,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:56,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:56,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:56,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 20:11:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 20:11:56,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:56,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119925539] [2023-04-01 20:11:56,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119925539] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:11:56,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:11:56,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 20:11:56,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255525271] [2023-04-01 20:11:56,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:11:56,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 20:11:56,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:11:56,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 20:11:56,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:11:56,503 INFO L87 Difference]: Start difference. First operand 497 states and 681 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:11:57,206 INFO L93 Difference]: Finished difference Result 621 states and 854 transitions. [2023-04-01 20:11:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:11:57,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2023-04-01 20:11:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:11:57,209 INFO L225 Difference]: With dead ends: 621 [2023-04-01 20:11:57,209 INFO L226 Difference]: Without dead ends: 514 [2023-04-01 20:11:57,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-04-01 20:11:57,211 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 306 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:11:57,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 42 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:11:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-04-01 20:11:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 497. [2023-04-01 20:11:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 422 states have (on average 1.3293838862559242) internal successors, (561), 430 states have internal predecessors, (561), 51 states have call successors, (51), 14 states have call predecessors, (51), 23 states have return successors, (67), 58 states have call predecessors, (67), 48 states have call successors, (67) [2023-04-01 20:11:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 679 transitions. [2023-04-01 20:11:57,269 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 679 transitions. Word has length 57 [2023-04-01 20:11:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:11:57,269 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 679 transitions. [2023-04-01 20:11:57,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 20:11:57,270 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 679 transitions. [2023-04-01 20:11:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 20:11:57,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:11:57,271 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:11:57,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 20:11:57,271 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:11:57,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:11:57,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1501567413, now seen corresponding path program 1 times [2023-04-01 20:11:57,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:11:57,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827792061] [2023-04-01 20:11:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:57,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:11:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:57,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:11:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:57,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:11:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:57,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:11:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:57,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 20:11:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:11:57,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:11:57,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827792061] [2023-04-01 20:11:57,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827792061] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:11:57,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410388853] [2023-04-01 20:11:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:11:57,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:11:57,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:11:57,827 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:11:57,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 20:11:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:11:57,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-01 20:11:57,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:12:34,861 WARN L223 SmtUtils]: Spent 31.66s on a formula simplification. DAG size of input: 2069 DAG size of output: 28 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-04-01 20:12:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:34,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:12:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:12:44,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410388853] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:12:44,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:12:44,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 51 [2023-04-01 20:12:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673087667] [2023-04-01 20:12:44,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:12:44,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-01 20:12:44,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:12:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-01 20:12:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 20:12:44,324 INFO L87 Difference]: Start difference. First operand 497 states and 679 transitions. Second operand has 51 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 39 states have internal predecessors, (97), 11 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 20:13:02,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 20:13:03,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 20:13:06,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 20:13:17,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 20:13:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:13:19,199 INFO L93 Difference]: Finished difference Result 900 states and 1238 transitions. [2023-04-01 20:13:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-04-01 20:13:19,199 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 39 states have internal predecessors, (97), 11 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 58 [2023-04-01 20:13:19,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:13:19,203 INFO L225 Difference]: With dead ends: 900 [2023-04-01 20:13:19,203 INFO L226 Difference]: Without dead ends: 790 [2023-04-01 20:13:19,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=609, Invalid=7763, Unknown=0, NotChecked=0, Total=8372 [2023-04-01 20:13:19,206 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 884 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 6452 mSolverCounterSat, 127 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 6581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 6452 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:13:19,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 162 Invalid, 6581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 6452 Invalid, 2 Unknown, 0 Unchecked, 23.3s Time] [2023-04-01 20:13:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2023-04-01 20:13:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 542. [2023-04-01 20:13:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 459 states have (on average 1.3246187363834423) internal successors, (608), 469 states have internal predecessors, (608), 56 states have call successors, (56), 16 states have call predecessors, (56), 26 states have return successors, (76), 62 states have call predecessors, (76), 53 states have call successors, (76) [2023-04-01 20:13:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 740 transitions. [2023-04-01 20:13:19,260 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 740 transitions. Word has length 58 [2023-04-01 20:13:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:13:19,260 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 740 transitions. [2023-04-01 20:13:19,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 39 states have internal predecessors, (97), 11 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 20:13:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 740 transitions. [2023-04-01 20:13:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:13:19,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:13:19,262 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:13:19,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 20:13:19,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 20:13:19,468 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:13:19,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:13:19,468 INFO L85 PathProgramCache]: Analyzing trace with hash 277417592, now seen corresponding path program 1 times [2023-04-01 20:13:19,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:13:19,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671683278] [2023-04-01 20:13:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:13:19,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:13:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:13:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:13:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:13:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:13:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-04-01 20:13:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:13:19,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:13:19,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671683278] [2023-04-01 20:13:19,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671683278] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:13:19,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:13:19,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 20:13:19,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348075481] [2023-04-01 20:13:19,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:13:19,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:13:19,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:13:19,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:13:19,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:13:19,519 INFO L87 Difference]: Start difference. First operand 542 states and 740 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:13:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:13:19,780 INFO L93 Difference]: Finished difference Result 551 states and 748 transitions. [2023-04-01 20:13:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:13:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2023-04-01 20:13:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:13:19,784 INFO L225 Difference]: With dead ends: 551 [2023-04-01 20:13:19,784 INFO L226 Difference]: Without dead ends: 516 [2023-04-01 20:13:19,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:13:19,785 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:13:19,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 17 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:13:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2023-04-01 20:13:19,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 502. [2023-04-01 20:13:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 424 states have (on average 1.3254716981132075) internal successors, (562), 435 states have internal predecessors, (562), 52 states have call successors, (52), 15 states have call predecessors, (52), 25 states have return successors, (71), 56 states have call predecessors, (71), 49 states have call successors, (71) [2023-04-01 20:13:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 685 transitions. [2023-04-01 20:13:19,829 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 685 transitions. Word has length 59 [2023-04-01 20:13:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:13:19,830 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 685 transitions. [2023-04-01 20:13:19,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 20:13:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 685 transitions. [2023-04-01 20:13:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:13:19,831 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:13:19,831 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:13:19,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 20:13:19,831 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:13:19,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:13:19,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2036520011, now seen corresponding path program 1 times [2023-04-01 20:13:19,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:13:19,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870091909] [2023-04-01 20:13:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:13:19,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:13:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:13:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:13:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:13:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:13:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:13:19,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:13:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870091909] [2023-04-01 20:13:19,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870091909] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:13:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948047824] [2023-04-01 20:13:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:13:19,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:13:19,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:13:19,922 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:13:19,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 20:13:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:19,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:13:19,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:13:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:13:20,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:13:20,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948047824] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:13:20,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:13:20,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 20:13:20,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904366022] [2023-04-01 20:13:20,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:13:20,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:13:20,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:13:20,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:13:20,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:13:20,021 INFO L87 Difference]: Start difference. First operand 502 states and 685 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 20:13:20,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:13:20,104 INFO L93 Difference]: Finished difference Result 867 states and 1196 transitions. [2023-04-01 20:13:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:13:20,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2023-04-01 20:13:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:13:20,106 INFO L225 Difference]: With dead ends: 867 [2023-04-01 20:13:20,106 INFO L226 Difference]: Without dead ends: 519 [2023-04-01 20:13:20,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:13:20,108 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 21 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:13:20,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 370 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 20:13:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-04-01 20:13:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 504. [2023-04-01 20:13:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 426 states have (on average 1.323943661971831) internal successors, (564), 437 states have internal predecessors, (564), 52 states have call successors, (52), 15 states have call predecessors, (52), 25 states have return successors, (71), 56 states have call predecessors, (71), 49 states have call successors, (71) [2023-04-01 20:13:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 687 transitions. [2023-04-01 20:13:20,154 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 687 transitions. Word has length 59 [2023-04-01 20:13:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:13:20,154 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 687 transitions. [2023-04-01 20:13:20,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 20:13:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 687 transitions. [2023-04-01 20:13:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:13:20,155 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:13:20,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:13:20,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 20:13:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:13:20,361 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:13:20,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:13:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1007160713, now seen corresponding path program 1 times [2023-04-01 20:13:20,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:13:20,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134869229] [2023-04-01 20:13:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:13:20,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:13:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:20,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:13:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:20,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:13:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:20,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:13:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:20,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:13:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:13:20,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:13:20,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134869229] [2023-04-01 20:13:20,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134869229] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:13:20,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339707115] [2023-04-01 20:13:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:13:20,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:13:20,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:13:20,935 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:13:20,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 20:13:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:21,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 20:13:21,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:13:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:13:21,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:13:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:13:23,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339707115] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:13:23,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:13:23,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 56 [2023-04-01 20:13:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789969876] [2023-04-01 20:13:23,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:13:23,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-04-01 20:13:23,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:13:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-04-01 20:13:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2908, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 20:13:23,832 INFO L87 Difference]: Start difference. First operand 504 states and 687 transitions. Second operand has 56 states, 53 states have (on average 2.056603773584906) internal successors, (109), 44 states have internal predecessors, (109), 12 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 20:13:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:13:38,752 INFO L93 Difference]: Finished difference Result 1074 states and 1558 transitions. [2023-04-01 20:13:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-04-01 20:13:38,753 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.056603773584906) internal successors, (109), 44 states have internal predecessors, (109), 12 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 59 [2023-04-01 20:13:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:13:38,757 INFO L225 Difference]: With dead ends: 1074 [2023-04-01 20:13:38,757 INFO L226 Difference]: Without dead ends: 984 [2023-04-01 20:13:38,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=781, Invalid=11429, Unknown=0, NotChecked=0, Total=12210 [2023-04-01 20:13:38,761 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1098 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 12210 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 12408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 12210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:13:38,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 187 Invalid, 12408 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [198 Valid, 12210 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2023-04-01 20:13:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2023-04-01 20:13:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 609. [2023-04-01 20:13:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 514 states have (on average 1.3190661478599222) internal successors, (678), 531 states have internal predecessors, (678), 62 states have call successors, (62), 18 states have call predecessors, (62), 32 states have return successors, (103), 64 states have call predecessors, (103), 59 states have call successors, (103) [2023-04-01 20:13:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 843 transitions. [2023-04-01 20:13:38,827 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 843 transitions. Word has length 59 [2023-04-01 20:13:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:13:38,827 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 843 transitions. [2023-04-01 20:13:38,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.056603773584906) internal successors, (109), 44 states have internal predecessors, (109), 12 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 20:13:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 843 transitions. [2023-04-01 20:13:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:13:38,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:13:38,829 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:13:38,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 20:13:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-04-01 20:13:39,035 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:13:39,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:13:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1317141375, now seen corresponding path program 1 times [2023-04-01 20:13:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:13:39,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031969047] [2023-04-01 20:13:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:13:39,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:13:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:39,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:13:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:39,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-01 20:13:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:39,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 20:13:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:39,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:13:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:13:39,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:13:39,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031969047] [2023-04-01 20:13:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031969047] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:13:39,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982291620] [2023-04-01 20:13:39,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:13:39,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:13:39,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:13:39,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:13:39,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 20:13:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:13:39,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-01 20:13:39,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:13:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:13:40,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:14:07,228 WARN L223 SmtUtils]: Spent 14.89s on a formula simplification. DAG size of input: 124 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 20:14:07,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982291620] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:14:07,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:14:07,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 34 [2023-04-01 20:14:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903551094] [2023-04-01 20:14:07,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 20:14:07,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 20:14:07,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:14:07,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 20:14:07,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 20:14:07,241 INFO L87 Difference]: Start difference. First operand 609 states and 843 transitions. Second operand has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 26 states have internal predecessors, (74), 7 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 20:14:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:14:11,379 INFO L93 Difference]: Finished difference Result 808 states and 1123 transitions. [2023-04-01 20:14:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 20:14:11,380 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 26 states have internal predecessors, (74), 7 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 59 [2023-04-01 20:14:11,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:14:11,383 INFO L225 Difference]: With dead ends: 808 [2023-04-01 20:14:11,383 INFO L226 Difference]: Without dead ends: 745 [2023-04-01 20:14:11,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=318, Invalid=3842, Unknown=0, NotChecked=0, Total=4160 [2023-04-01 20:14:11,386 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 542 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 5256 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 5334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 5256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:14:11,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 112 Invalid, 5334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 5256 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 20:14:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-04-01 20:14:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 652. [2023-04-01 20:14:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 550 states have (on average 1.3163636363636364) internal successors, (724), 569 states have internal predecessors, (724), 66 states have call successors, (66), 20 states have call predecessors, (66), 35 states have return successors, (108), 67 states have call predecessors, (108), 63 states have call successors, (108) [2023-04-01 20:14:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 898 transitions. [2023-04-01 20:14:11,452 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 898 transitions. Word has length 59 [2023-04-01 20:14:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:14:11,453 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 898 transitions. [2023-04-01 20:14:11,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 26 states have internal predecessors, (74), 7 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 20:14:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 898 transitions. [2023-04-01 20:14:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 20:14:11,457 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:14:11,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 20:14:11,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 20:14:11,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-04-01 20:14:11,665 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:14:11,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:14:11,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1083580027, now seen corresponding path program 1 times [2023-04-01 20:14:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:14:11,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557222224] [2023-04-01 20:14:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:14:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:14:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 20:14:11,692 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 20:14:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 20:14:11,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-04-01 20:14:11,736 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 20:14:11,737 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 20:14:11,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-01 20:14:11,741 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:14:11,743 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 20:14:11,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 08:14:11 BoogieIcfgContainer [2023-04-01 20:14:11,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 20:14:11,794 INFO L158 Benchmark]: Toolchain (without parser) took 156928.33ms. Allocated memory was 194.0MB in the beginning and 513.8MB in the end (delta: 319.8MB). Free memory was 158.9MB in the beginning and 194.3MB in the end (delta: -35.4MB). Peak memory consumption was 286.0MB. Max. memory is 8.0GB. [2023-04-01 20:14:11,794 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 194.0MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 20:14:11,794 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.71ms. Allocated memory is still 194.0MB. Free memory was 158.9MB in the beginning and 144.8MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-04-01 20:14:11,794 INFO L158 Benchmark]: Boogie Preprocessor took 42.33ms. Allocated memory is still 194.0MB. Free memory was 144.8MB in the beginning and 142.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 20:14:11,794 INFO L158 Benchmark]: RCFGBuilder took 710.94ms. Allocated memory is still 194.0MB. Free memory was 142.7MB in the beginning and 115.0MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2023-04-01 20:14:11,794 INFO L158 Benchmark]: TraceAbstraction took 155900.50ms. Allocated memory was 194.0MB in the beginning and 513.8MB in the end (delta: 319.8MB). Free memory was 114.4MB in the beginning and 194.3MB in the end (delta: -79.9MB). Peak memory consumption was 240.9MB. Max. memory is 8.0GB. [2023-04-01 20:14:11,795 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 194.0MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 269.71ms. Allocated memory is still 194.0MB. Free memory was 158.9MB in the beginning and 144.8MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.33ms. Allocated memory is still 194.0MB. Free memory was 144.8MB in the beginning and 142.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 710.94ms. Allocated memory is still 194.0MB. Free memory was 142.7MB in the beginning and 115.0MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. * TraceAbstraction took 155900.50ms. Allocated memory was 194.0MB in the beginning and 513.8MB in the end (delta: 319.8MB). Free memory was 114.4MB in the beginning and 194.3MB in the end (delta: -79.9MB). Peak memory consumption was 240.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add ; [L234] unsigned int zero ; [L235] int sa ; [L236] int sb ; [L237] int tmp ; [L238] int tmp___0 ; [L239] int tmp___1 ; [L240] int tmp___2 ; [L241] int tmp___3 ; [L242] int tmp___4 ; [L243] int tmp___5 ; [L244] int tmp___6 ; [L245] int tmp___7 ; [L246] int tmp___8 ; [L247] int tmp___9 ; [L248] int __retres23 ; VAL [ea=127, eb=-128, ma=33554432] [L252] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L81] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L252] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=-128, ma=33554432] [L252] zero = base2flt(0, 0) [L253] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L81] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L253] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=-128, ma=33554432, zero=0] [L253] a = base2flt(ma, ea) [L254] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-128, \old(m)=16777216] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L30] COND FALSE !(! m) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L58] COND TRUE 1 VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L77] EXPR m & ~ (1U << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m & ~ (1U << 24U)=-72057589726183424, m=16777216] [L77] m = m & ~ (1U << 24U) [L78] EXPR m | ((unsigned int ) (e + 128) << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m | ((unsigned int ) (e + 128) << 24U)=-72057589726183424, m=16777216] [L78] res = m | ((unsigned int ) (e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=-128, \old(m)=16777216, __retres4=16777216, e=-128, m=16777216, res=16777216] [L81] return (__retres4); VAL [\old(e)=-128, \old(m)=16777216, \result=-72057589726183424, __retres4=16777216, e=-128, m=16777216, res=16777216] [L254] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=-72057589726183424, ea=127, eb=-128, ma=33554432, mb=16777216, zero=0] [L254] b = base2flt(mb, eb) [L256] COND FALSE !(a < zero) VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, zero=0] [L259] COND TRUE a > zero [L260] tmp = 1 VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, tmp=1, zero=0] [L264] sa = tmp VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, sa=1, tmp=1, zero=0] [L266] COND FALSE !(b < zero) VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, sa=1, tmp=1, zero=0] [L269] COND TRUE b > zero [L270] tmp___0 = 1 VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L274] sb = tmp___0 VAL [a=4294967295, b=16777216, ea=127, eb=-128, ma=33554432, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L277] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=16777216] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216] [L95] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, ma=16777215] [L111] EXPR ma | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, ma | (1U << 24U)=-4261412865, ma=16777215] [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, eb=129, ma=33554431, mb=0] [L114] EXPR mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=16777216, a=4294967295, b=16777216, ea=127, eb=129, ma=33554431, mb | (1U << 24U)=16777216, mb=0] [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 128 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 155.8s, OverallIterations: 23, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 67.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 6690 SdHoareTripleChecker+Valid, 45.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6546 mSDsluCounter, 5192 SdHoareTripleChecker+Invalid, 41.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4525 mSDsCounter, 707 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45068 IncrementalHoareTripleChecker+Invalid, 45777 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 707 mSolverCounterUnsat, 667 mSDtfsCounter, 45068 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1572 GetRequests, 1006 SyntacticMatches, 14 SemanticMatches, 552 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6667 ImplicationChecksByTransitivity, 49.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=652occurred in iteration=22, InterpolantAutomatonStates: 314, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 22 MinimizatonAttempts, 1278 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 83.4s InterpolantComputationTime, 1845 NumberOfCodeBlocks, 1827 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 2064 ConstructedInterpolants, 1 QuantifiedInterpolants, 10408 SizeOfPredicates, 68 NumberOfNonLiveVariables, 1880 ConjunctsInSsa, 302 ConjunctsInUnsatCore, 39 InterpolantComputations, 15 PerfectInterpolantSequences, 535/644 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-04-01 20:14:12,009 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-04-01 20:14:12,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...