./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 19:22:06,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:22:06,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:22:06,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:22:06,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:22:06,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:22:06,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:22:06,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:22:06,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:22:06,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:22:06,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:22:06,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:22:06,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:22:06,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:22:06,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:22:06,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:22:06,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:22:06,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:22:06,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:22:06,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:22:06,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:22:06,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:22:06,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:22:06,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:22:06,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:22:06,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:22:06,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:22:06,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:22:06,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:22:06,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:22:06,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:22:06,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:22:06,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:22:06,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:22:06,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:22:06,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:22:06,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:22:06,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:22:06,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:22:06,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:22:06,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:22:06,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:22:06,096 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:22:06,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:22:06,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:22:06,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:22:06,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:22:06,097 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:22:06,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:22:06,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:22:06,098 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:22:06,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:22:06,098 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:22:06,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:22:06,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:22:06,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:22:06,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:22:06,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:22:06,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:22:06,099 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:22:06,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:22:06,100 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:22:06,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:22:06,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:22:06,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:22:06,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:22:06,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:22:06,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:22:06,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:22:06,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:22:06,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:22:06,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:22:06,101 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:22:06,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:22:06,102 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:22:06,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:22:06,102 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:22:06,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2023-02-15 19:22:06,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:22:06,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:22:06,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:22:06,326 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:22:06,326 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:22:06,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-02-15 19:22:07,436 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:22:07,711 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:22:07,712 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-02-15 19:22:07,736 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb68f9375/b291feb60dd348df95d2effec57acdd8/FLAG499dfe6d0 [2023-02-15 19:22:07,765 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb68f9375/b291feb60dd348df95d2effec57acdd8 [2023-02-15 19:22:07,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:22:07,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:22:07,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:22:07,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:22:07,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:22:07,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:22:07" (1/1) ... [2023-02-15 19:22:07,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e24ab23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:07, skipping insertion in model container [2023-02-15 19:22:07,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:22:07" (1/1) ... [2023-02-15 19:22:07,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:22:07,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:22:07,945 WARN L237 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_4-3a.c.cil.c[730,743] [2023-02-15 19:22:07,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:22:07,999 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:22:08,006 WARN L237 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_4-3a.c.cil.c[730,743] [2023-02-15 19:22:08,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:22:08,047 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:22:08,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08 WrapperNode [2023-02-15 19:22:08,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:22:08,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:22:08,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:22:08,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:22:08,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,080 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-02-15 19:22:08,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:22:08,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:22:08,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:22:08,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:22:08,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,098 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:22:08,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:22:08,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:22:08,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:22:08,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (1/1) ... [2023-02-15 19:22:08,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:22:08,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:08,139 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) [2023-02-15 19:22:08,151 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 [2023-02-15 19:22:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:22:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:22:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-15 19:22:08,174 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-15 19:22:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:22:08,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:22:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-02-15 19:22:08,175 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-02-15 19:22:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 19:22:08,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 19:22:08,248 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:22:08,252 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:22:08,493 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:22:08,498 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:22:08,498 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 19:22:08,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:22:08 BoogieIcfgContainer [2023-02-15 19:22:08,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:22:08,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:22:08,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:22:08,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:22:08,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:22:07" (1/3) ... [2023-02-15 19:22:08,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6c2b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:22:08, skipping insertion in model container [2023-02-15 19:22:08,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:22:08" (2/3) ... [2023-02-15 19:22:08,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6c2b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:22:08, skipping insertion in model container [2023-02-15 19:22:08,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:22:08" (3/3) ... [2023-02-15 19:22:08,504 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2023-02-15 19:22:08,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:22:08,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:22:08,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:22:08,566 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;@16685d71, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:22:08,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:22:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 62 states have (on average 1.564516129032258) internal successors, (97), 63 states have internal predecessors, (97), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 19:22:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 19:22:08,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:08,578 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] [2023-02-15 19:22:08,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1494196714, now seen corresponding path program 1 times [2023-02-15 19:22:08,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:08,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86079967] [2023-02-15 19:22:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:08,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:09,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:09,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:09,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:09,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:09,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86079967] [2023-02-15 19:22:09,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86079967] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:09,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936484028] [2023-02-15 19:22:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:09,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:09,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:09,188 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) [2023-02-15 19:22:09,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 19:22:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:09,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 19:22:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 19:22:09,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:22:09,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936484028] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:09,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:22:09,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 5] total 13 [2023-02-15 19:22:09,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039187045] [2023-02-15 19:22:09,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:09,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 19:22:09,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:09,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 19:22:09,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:22:09,410 INFO L87 Difference]: Start difference. First operand has 76 states, 62 states have (on average 1.564516129032258) internal successors, (97), 63 states have internal predecessors, (97), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:09,469 INFO L93 Difference]: Finished difference Result 152 states and 239 transitions. [2023-02-15 19:22:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 19:22:09,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-02-15 19:22:09,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:09,482 INFO L225 Difference]: With dead ends: 152 [2023-02-15 19:22:09,483 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 19:22:09,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:22:09,491 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 33 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:09,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 173 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:22:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 19:22:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-02-15 19:22:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 60 states have internal predecessors, (86), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 19:22:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 103 transitions. [2023-02-15 19:22:09,530 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 103 transitions. Word has length 39 [2023-02-15 19:22:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:09,531 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 103 transitions. [2023-02-15 19:22:09,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 103 transitions. [2023-02-15 19:22:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 19:22:09,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:09,535 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] [2023-02-15 19:22:09,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 19:22:09,739 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 [2023-02-15 19:22:09,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash 237309308, now seen corresponding path program 1 times [2023-02-15 19:22:09,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:09,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164904926] [2023-02-15 19:22:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:09,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:09,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:09,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:09,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:09,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:09,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164904926] [2023-02-15 19:22:09,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164904926] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:09,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476768167] [2023-02-15 19:22:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:09,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:09,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:09,911 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) [2023-02-15 19:22:09,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 19:22:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:09,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 19:22:09,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:10,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:10,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476768167] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:10,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:10,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-15 19:22:10,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241897921] [2023-02-15 19:22:10,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:10,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 19:22:10,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:10,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 19:22:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-15 19:22:10,214 INFO L87 Difference]: Start difference. First operand 72 states and 103 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 19:22:10,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:10,353 INFO L93 Difference]: Finished difference Result 193 states and 282 transitions. [2023-02-15 19:22:10,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 19:22:10,353 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-02-15 19:22:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:10,355 INFO L225 Difference]: With dead ends: 193 [2023-02-15 19:22:10,355 INFO L226 Difference]: Without dead ends: 148 [2023-02-15 19:22:10,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-02-15 19:22:10,357 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 178 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:10,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1213 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:22:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-15 19:22:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2023-02-15 19:22:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 93 states have internal predecessors, (130), 14 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2023-02-15 19:22:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2023-02-15 19:22:10,367 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 40 [2023-02-15 19:22:10,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:10,368 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2023-02-15 19:22:10,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 19:22:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2023-02-15 19:22:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 19:22:10,369 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:10,369 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] [2023-02-15 19:22:10,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:10,582 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 [2023-02-15 19:22:10,583 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:10,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1042554370, now seen corresponding path program 1 times [2023-02-15 19:22:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:10,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179534400] [2023-02-15 19:22:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:10,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:10,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:10,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:10,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179534400] [2023-02-15 19:22:10,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179534400] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:10,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:10,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 19:22:10,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305400261] [2023-02-15 19:22:10,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:10,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 19:22:10,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 19:22:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:22:10,661 INFO L87 Difference]: Start difference. First operand 111 states and 161 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:10,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:10,716 INFO L93 Difference]: Finished difference Result 208 states and 297 transitions. [2023-02-15 19:22:10,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:22:10,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-15 19:22:10,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:10,718 INFO L225 Difference]: With dead ends: 208 [2023-02-15 19:22:10,718 INFO L226 Difference]: Without dead ends: 134 [2023-02-15 19:22:10,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-15 19:22:10,719 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 17 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:10,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 666 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:22:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-15 19:22:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2023-02-15 19:22:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 97 states have (on average 1.402061855670103) internal successors, (136), 99 states have internal predecessors, (136), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2023-02-15 19:22:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2023-02-15 19:22:10,727 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 40 [2023-02-15 19:22:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:10,727 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2023-02-15 19:22:10,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2023-02-15 19:22:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 19:22:10,729 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:10,729 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-02-15 19:22:10,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 19:22:10,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1148734548, now seen corresponding path program 1 times [2023-02-15 19:22:10,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:10,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5571508] [2023-02-15 19:22:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:10,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:10,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:10,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:10,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:10,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:22:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:10,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 19:22:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 19:22:10,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5571508] [2023-02-15 19:22:10,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5571508] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:10,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:10,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 19:22:10,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730081771] [2023-02-15 19:22:10,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:10,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 19:22:10,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 19:22:10,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-15 19:22:10,926 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 19:22:11,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:11,080 INFO L93 Difference]: Finished difference Result 179 states and 256 transitions. [2023-02-15 19:22:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 19:22:11,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2023-02-15 19:22:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:11,083 INFO L225 Difference]: With dead ends: 179 [2023-02-15 19:22:11,083 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 19:22:11,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:22:11,088 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 92 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:11,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 1046 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:22:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 19:22:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2023-02-15 19:22:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 125 states have (on average 1.416) internal successors, (177), 128 states have internal predecessors, (177), 20 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (25), 19 states have call predecessors, (25), 19 states have call successors, (25) [2023-02-15 19:22:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 222 transitions. [2023-02-15 19:22:11,117 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 222 transitions. Word has length 44 [2023-02-15 19:22:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:11,118 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 222 transitions. [2023-02-15 19:22:11,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 19:22:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 222 transitions. [2023-02-15 19:22:11,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 19:22:11,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:11,123 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 19:22:11,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 19:22:11,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:11,124 INFO L85 PathProgramCache]: Analyzing trace with hash -447669970, now seen corresponding path program 1 times [2023-02-15 19:22:11,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:11,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895401641] [2023-02-15 19:22:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:11,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:11,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:11,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:11,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:11,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:22:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:11,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 19:22:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:22:11,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:11,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895401641] [2023-02-15 19:22:11,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895401641] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:11,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:11,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 19:22:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194857915] [2023-02-15 19:22:11,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:11,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 19:22:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:11,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 19:22:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:22:11,473 INFO L87 Difference]: Start difference. First operand 153 states and 222 transitions. Second operand has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 19:22:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:11,787 INFO L93 Difference]: Finished difference Result 187 states and 266 transitions. [2023-02-15 19:22:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 19:22:11,787 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-02-15 19:22:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:11,788 INFO L225 Difference]: With dead ends: 187 [2023-02-15 19:22:11,788 INFO L226 Difference]: Without dead ends: 179 [2023-02-15 19:22:11,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-02-15 19:22:11,789 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 75 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:11,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1685 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:22:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-15 19:22:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2023-02-15 19:22:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 132 states have (on average 1.4015151515151516) internal successors, (185), 134 states have internal predecessors, (185), 20 states have call successors, (20), 5 states have call predecessors, (20), 8 states have return successors, (28), 21 states have call predecessors, (28), 19 states have call successors, (28) [2023-02-15 19:22:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 233 transitions. [2023-02-15 19:22:11,797 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 233 transitions. Word has length 44 [2023-02-15 19:22:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:11,797 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 233 transitions. [2023-02-15 19:22:11,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 19:22:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 233 transitions. [2023-02-15 19:22:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 19:22:11,798 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:11,798 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] [2023-02-15 19:22:11,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 19:22:11,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:11,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1178693971, now seen corresponding path program 1 times [2023-02-15 19:22:11,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:11,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358395728] [2023-02-15 19:22:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:11,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:11,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:11,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:11,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:11,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:11,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358395728] [2023-02-15 19:22:11,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358395728] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:11,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:11,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 19:22:11,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067897687] [2023-02-15 19:22:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:11,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 19:22:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 19:22:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:22:11,864 INFO L87 Difference]: Start difference. First operand 161 states and 233 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:11,954 INFO L93 Difference]: Finished difference Result 374 states and 549 transitions. [2023-02-15 19:22:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:22:11,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-02-15 19:22:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:11,957 INFO L225 Difference]: With dead ends: 374 [2023-02-15 19:22:11,957 INFO L226 Difference]: Without dead ends: 275 [2023-02-15 19:22:11,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-15 19:22:11,959 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 115 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:11,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1056 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:22:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-02-15 19:22:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 241. [2023-02-15 19:22:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 201 states have (on average 1.407960199004975) internal successors, (283), 204 states have internal predecessors, (283), 28 states have call successors, (28), 7 states have call predecessors, (28), 11 states have return successors, (40), 29 states have call predecessors, (40), 27 states have call successors, (40) [2023-02-15 19:22:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 351 transitions. [2023-02-15 19:22:11,978 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 351 transitions. Word has length 44 [2023-02-15 19:22:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:11,980 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 351 transitions. [2023-02-15 19:22:11,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 351 transitions. [2023-02-15 19:22:11,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 19:22:11,982 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:11,984 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] [2023-02-15 19:22:11,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 19:22:11,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:11,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1988040597, now seen corresponding path program 1 times [2023-02-15 19:22:11,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:11,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64077646] [2023-02-15 19:22:11,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:11,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:12,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:12,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64077646] [2023-02-15 19:22:12,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64077646] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:12,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454520944] [2023-02-15 19:22:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:12,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:12,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:12,212 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) [2023-02-15 19:22:12,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 19:22:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 19:22:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 19:22:12,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 19:22:12,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454520944] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:12,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:22:12,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 15 [2023-02-15 19:22:12,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663905409] [2023-02-15 19:22:12,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:12,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:22:12,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:12,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:22:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:22:12,383 INFO L87 Difference]: Start difference. First operand 241 states and 351 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:12,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:12,406 INFO L93 Difference]: Finished difference Result 375 states and 544 transitions. [2023-02-15 19:22:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:22:12,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-02-15 19:22:12,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:12,407 INFO L225 Difference]: With dead ends: 375 [2023-02-15 19:22:12,407 INFO L226 Difference]: Without dead ends: 203 [2023-02-15 19:22:12,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:22:12,409 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 74 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:12,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 162 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:22:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-15 19:22:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 181. [2023-02-15 19:22:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 149 states have (on average 1.3758389261744965) internal successors, (205), 152 states have internal predecessors, (205), 21 states have call successors, (21), 6 states have call predecessors, (21), 10 states have return successors, (33), 22 states have call predecessors, (33), 20 states have call successors, (33) [2023-02-15 19:22:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 259 transitions. [2023-02-15 19:22:12,425 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 259 transitions. Word has length 44 [2023-02-15 19:22:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:12,425 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 259 transitions. [2023-02-15 19:22:12,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 259 transitions. [2023-02-15 19:22:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 19:22:12,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:12,437 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 19:22:12,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 19:22:12,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:12,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:12,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1299374066, now seen corresponding path program 1 times [2023-02-15 19:22:12,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:12,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749763364] [2023-02-15 19:22:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:12,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:22:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 19:22:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 19:22:12,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:12,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749763364] [2023-02-15 19:22:12,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749763364] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:12,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:12,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:22:12,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852596217] [2023-02-15 19:22:12,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:12,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:22:12,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:22:12,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:22:12,721 INFO L87 Difference]: Start difference. First operand 181 states and 259 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 19:22:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:12,745 INFO L93 Difference]: Finished difference Result 189 states and 266 transitions. [2023-02-15 19:22:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 19:22:12,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2023-02-15 19:22:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:12,748 INFO L225 Difference]: With dead ends: 189 [2023-02-15 19:22:12,748 INFO L226 Difference]: Without dead ends: 178 [2023-02-15 19:22:12,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:22:12,749 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 7 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:12,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 482 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:22:12,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-15 19:22:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2023-02-15 19:22:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 144 states have (on average 1.375) internal successors, (198), 147 states have internal predecessors, (198), 21 states have call successors, (21), 6 states have call predecessors, (21), 9 states have return successors, (30), 21 states have call predecessors, (30), 20 states have call successors, (30) [2023-02-15 19:22:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 249 transitions. [2023-02-15 19:22:12,760 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 249 transitions. Word has length 46 [2023-02-15 19:22:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:12,760 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 249 transitions. [2023-02-15 19:22:12,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 19:22:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 249 transitions. [2023-02-15 19:22:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 19:22:12,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:12,761 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:22:12,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 19:22:12,761 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:12,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:12,761 INFO L85 PathProgramCache]: Analyzing trace with hash -662590119, now seen corresponding path program 1 times [2023-02-15 19:22:12,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:12,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241380166] [2023-02-15 19:22:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:12,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 19:22:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 19:22:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 19:22:12,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:12,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241380166] [2023-02-15 19:22:12,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241380166] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:12,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:12,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:22:12,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838747146] [2023-02-15 19:22:12,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:12,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:22:12,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:22:12,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:22:12,920 INFO L87 Difference]: Start difference. First operand 175 states and 249 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 19:22:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:13,064 INFO L93 Difference]: Finished difference Result 229 states and 323 transitions. [2023-02-15 19:22:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:22:13,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2023-02-15 19:22:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:13,065 INFO L225 Difference]: With dead ends: 229 [2023-02-15 19:22:13,066 INFO L226 Difference]: Without dead ends: 218 [2023-02-15 19:22:13,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:22:13,066 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 86 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:13,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 975 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:22:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-15 19:22:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 182. [2023-02-15 19:22:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 148 states have (on average 1.364864864864865) internal successors, (202), 152 states have internal predecessors, (202), 23 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) [2023-02-15 19:22:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 260 transitions. [2023-02-15 19:22:13,077 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 260 transitions. Word has length 48 [2023-02-15 19:22:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:13,077 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 260 transitions. [2023-02-15 19:22:13,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 19:22:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 260 transitions. [2023-02-15 19:22:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 19:22:13,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:13,078 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] [2023-02-15 19:22:13,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 19:22:13,079 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:13,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:13,079 INFO L85 PathProgramCache]: Analyzing trace with hash 38474459, now seen corresponding path program 1 times [2023-02-15 19:22:13,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:13,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503317720] [2023-02-15 19:22:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:13,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:13,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:13,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:13,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:13,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 19:22:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 19:22:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:13,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:13,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503317720] [2023-02-15 19:22:13,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503317720] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:13,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890717859] [2023-02-15 19:22:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:13,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:13,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:13,315 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) [2023-02-15 19:22:13,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 19:22:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 19:22:13,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 19:22:13,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:13,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890717859] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:13,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:13,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-15 19:22:13,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355313951] [2023-02-15 19:22:13,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:13,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 19:22:13,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:13,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 19:22:13,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-15 19:22:13,865 INFO L87 Difference]: Start difference. First operand 182 states and 260 transitions. Second operand has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 19:22:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:15,415 INFO L93 Difference]: Finished difference Result 352 states and 515 transitions. [2023-02-15 19:22:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 19:22:15,416 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2023-02-15 19:22:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:15,417 INFO L225 Difference]: With dead ends: 352 [2023-02-15 19:22:15,417 INFO L226 Difference]: Without dead ends: 340 [2023-02-15 19:22:15,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 19:22:15,419 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 351 mSDsluCounter, 4041 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 4239 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:15,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 4239 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 19:22:15,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-15 19:22:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 221. [2023-02-15 19:22:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 176 states have (on average 1.3238636363636365) internal successors, (233), 184 states have internal predecessors, (233), 28 states have call successors, (28), 7 states have call predecessors, (28), 16 states have return successors, (66), 29 states have call predecessors, (66), 27 states have call successors, (66) [2023-02-15 19:22:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 327 transitions. [2023-02-15 19:22:15,435 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 327 transitions. Word has length 48 [2023-02-15 19:22:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:15,435 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 327 transitions. [2023-02-15 19:22:15,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 19:22:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 327 transitions. [2023-02-15 19:22:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 19:22:15,436 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:15,436 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] [2023-02-15 19:22:15,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:15,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:15,641 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1608873757, now seen corresponding path program 2 times [2023-02-15 19:22:15,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:15,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653683982] [2023-02-15 19:22:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:15,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:15,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:15,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:15,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:22:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:15,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 19:22:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:15,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 19:22:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:15,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653683982] [2023-02-15 19:22:15,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653683982] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867018886] [2023-02-15 19:22:15,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:22:15,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:15,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:15,807 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) [2023-02-15 19:22:15,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 19:22:15,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:22:15,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:22:15,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 19:22:15,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 19:22:16,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:16,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867018886] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:16,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:16,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-15 19:22:16,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500084901] [2023-02-15 19:22:16,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:16,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 19:22:16,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:16,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 19:22:16,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-15 19:22:16,379 INFO L87 Difference]: Start difference. First operand 221 states and 327 transitions. Second operand has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-15 19:22:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:18,004 INFO L93 Difference]: Finished difference Result 393 states and 624 transitions. [2023-02-15 19:22:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 19:22:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 48 [2023-02-15 19:22:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:18,006 INFO L225 Difference]: With dead ends: 393 [2023-02-15 19:22:18,006 INFO L226 Difference]: Without dead ends: 380 [2023-02-15 19:22:18,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=3183, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 19:22:18,007 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 351 mSDsluCounter, 4053 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 4246 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:18,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 4246 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 19:22:18,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-15 19:22:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 241. [2023-02-15 19:22:18,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 187 states have (on average 1.304812834224599) internal successors, (244), 197 states have internal predecessors, (244), 35 states have call successors, (35), 7 states have call predecessors, (35), 18 states have return successors, (105), 36 states have call predecessors, (105), 34 states have call successors, (105) [2023-02-15 19:22:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 384 transitions. [2023-02-15 19:22:18,027 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 384 transitions. Word has length 48 [2023-02-15 19:22:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:18,027 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 384 transitions. [2023-02-15 19:22:18,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-15 19:22:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 384 transitions. [2023-02-15 19:22:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 19:22:18,029 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:18,029 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-15 19:22:18,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:18,234 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,SelfDestructingSolverStorable10 [2023-02-15 19:22:18,234 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:18,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1889190333, now seen corresponding path program 1 times [2023-02-15 19:22:18,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:18,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646916248] [2023-02-15 19:22:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:18,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:18,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:18,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:18,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:18,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:22:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:18,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:18,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646916248] [2023-02-15 19:22:18,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646916248] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:18,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029441923] [2023-02-15 19:22:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:18,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:18,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:18,307 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) [2023-02-15 19:22:18,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 19:22:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:18,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 19:22:18,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:18,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:18,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029441923] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:18,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:18,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-15 19:22:18,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799682995] [2023-02-15 19:22:18,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:18,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 19:22:18,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 19:22:18,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-15 19:22:18,520 INFO L87 Difference]: Start difference. First operand 241 states and 384 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 19:22:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:18,626 INFO L93 Difference]: Finished difference Result 348 states and 535 transitions. [2023-02-15 19:22:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:22:18,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 49 [2023-02-15 19:22:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:18,628 INFO L225 Difference]: With dead ends: 348 [2023-02-15 19:22:18,628 INFO L226 Difference]: Without dead ends: 252 [2023-02-15 19:22:18,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-02-15 19:22:18,629 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 15 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:18,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1730 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:22:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-02-15 19:22:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 228. [2023-02-15 19:22:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 177 states have (on average 1.2881355932203389) internal successors, (228), 186 states have internal predecessors, (228), 33 states have call successors, (33), 8 states have call predecessors, (33), 17 states have return successors, (80), 33 states have call predecessors, (80), 32 states have call successors, (80) [2023-02-15 19:22:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 341 transitions. [2023-02-15 19:22:18,646 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 341 transitions. Word has length 49 [2023-02-15 19:22:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:18,646 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 341 transitions. [2023-02-15 19:22:18,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 19:22:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 341 transitions. [2023-02-15 19:22:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 19:22:18,647 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:18,647 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:22:18,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:18,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:18,869 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:18,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash 698178595, now seen corresponding path program 1 times [2023-02-15 19:22:18,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:18,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405908954] [2023-02-15 19:22:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:18,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:18,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:18,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:19,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 19:22:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:19,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 19:22:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 19:22:19,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:19,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405908954] [2023-02-15 19:22:19,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405908954] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:19,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745403640] [2023-02-15 19:22:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:19,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:19,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:19,065 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) [2023-02-15 19:22:19,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 19:22:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:19,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 19:22:19,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 19:22:19,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 19:22:19,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745403640] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:19,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:19,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2023-02-15 19:22:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526464992] [2023-02-15 19:22:19,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:19,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 19:22:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 19:22:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-02-15 19:22:19,397 INFO L87 Difference]: Start difference. First operand 228 states and 341 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 19:22:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:19,817 INFO L93 Difference]: Finished difference Result 566 states and 863 transitions. [2023-02-15 19:22:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 19:22:19,818 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 50 [2023-02-15 19:22:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:19,819 INFO L225 Difference]: With dead ends: 566 [2023-02-15 19:22:19,819 INFO L226 Difference]: Without dead ends: 330 [2023-02-15 19:22:19,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 19:22:19,821 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 257 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:19,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1516 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:22:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-15 19:22:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 227. [2023-02-15 19:22:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 177 states have (on average 1.2824858757062148) internal successors, (227), 185 states have internal predecessors, (227), 32 states have call successors, (32), 9 states have call predecessors, (32), 17 states have return successors, (78), 32 states have call predecessors, (78), 31 states have call successors, (78) [2023-02-15 19:22:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 337 transitions. [2023-02-15 19:22:19,836 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 337 transitions. Word has length 50 [2023-02-15 19:22:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:19,836 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 337 transitions. [2023-02-15 19:22:19,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 19:22:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 337 transitions. [2023-02-15 19:22:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 19:22:19,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:19,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:22:19,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:20,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:20,043 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1308875237, now seen corresponding path program 2 times [2023-02-15 19:22:20,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:20,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858273077] [2023-02-15 19:22:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:20,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:20,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:20,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:20,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:22:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:20,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 19:22:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:20,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 19:22:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 19:22:20,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:20,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858273077] [2023-02-15 19:22:20,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858273077] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:20,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867243914] [2023-02-15 19:22:20,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:22:20,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:20,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:20,131 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) [2023-02-15 19:22:20,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 19:22:20,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:22:20,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:22:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 19:22:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 19:22:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:20,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867243914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:20,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:20,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 10] total 21 [2023-02-15 19:22:20,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360929373] [2023-02-15 19:22:20,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:20,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 19:22:20,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:20,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 19:22:20,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-02-15 19:22:20,477 INFO L87 Difference]: Start difference. First operand 227 states and 337 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-15 19:22:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:20,983 INFO L93 Difference]: Finished difference Result 494 states and 778 transitions. [2023-02-15 19:22:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 19:22:20,983 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 50 [2023-02-15 19:22:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:20,988 INFO L225 Difference]: With dead ends: 494 [2023-02-15 19:22:20,989 INFO L226 Difference]: Without dead ends: 478 [2023-02-15 19:22:20,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 19:22:20,990 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 423 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:20,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 1945 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 19:22:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-02-15 19:22:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 238. [2023-02-15 19:22:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 183 states have (on average 1.273224043715847) internal successors, (233), 192 states have internal predecessors, (233), 36 states have call successors, (36), 9 states have call predecessors, (36), 18 states have return successors, (102), 36 states have call predecessors, (102), 35 states have call successors, (102) [2023-02-15 19:22:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 371 transitions. [2023-02-15 19:22:21,025 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 371 transitions. Word has length 50 [2023-02-15 19:22:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:21,026 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 371 transitions. [2023-02-15 19:22:21,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-15 19:22:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 371 transitions. [2023-02-15 19:22:21,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 19:22:21,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:21,031 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] [2023-02-15 19:22:21,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 19:22:21,244 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,SelfDestructingSolverStorable13 [2023-02-15 19:22:21,244 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:21,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2061582742, now seen corresponding path program 1 times [2023-02-15 19:22:21,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:21,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583887415] [2023-02-15 19:22:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:21,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:21,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:21,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:21,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:22:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 19:22:21,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:21,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583887415] [2023-02-15 19:22:21,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583887415] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:21,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:21,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:22:21,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977770968] [2023-02-15 19:22:21,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:21,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:22:21,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:22:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:22:21,360 INFO L87 Difference]: Start difference. First operand 238 states and 371 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:21,486 INFO L93 Difference]: Finished difference Result 378 states and 576 transitions. [2023-02-15 19:22:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:22:21,487 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2023-02-15 19:22:21,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:21,488 INFO L225 Difference]: With dead ends: 378 [2023-02-15 19:22:21,488 INFO L226 Difference]: Without dead ends: 260 [2023-02-15 19:22:21,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:22:21,493 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 158 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:21,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1310 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:22:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-15 19:22:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 238. [2023-02-15 19:22:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 183 states have (on average 1.2677595628415301) internal successors, (232), 192 states have internal predecessors, (232), 36 states have call successors, (36), 9 states have call predecessors, (36), 18 states have return successors, (102), 36 states have call predecessors, (102), 35 states have call successors, (102) [2023-02-15 19:22:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 370 transitions. [2023-02-15 19:22:21,542 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 370 transitions. Word has length 49 [2023-02-15 19:22:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:21,542 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 370 transitions. [2023-02-15 19:22:21,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 370 transitions. [2023-02-15 19:22:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 19:22:21,543 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:21,543 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] [2023-02-15 19:22:21,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 19:22:21,543 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1646578540, now seen corresponding path program 1 times [2023-02-15 19:22:21,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:21,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977437573] [2023-02-15 19:22:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:21,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:21,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:21,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:21,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:22:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 19:22:21,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977437573] [2023-02-15 19:22:21,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977437573] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400428408] [2023-02-15 19:22:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:21,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:21,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:21,609 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) [2023-02-15 19:22:21,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 19:22:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:21,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 19:22:21,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 19:22:21,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 19:22:21,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400428408] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:21,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:21,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 19:22:21,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953842323] [2023-02-15 19:22:21,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:21,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 19:22:21,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:21,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 19:22:21,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-02-15 19:22:21,748 INFO L87 Difference]: Start difference. First operand 238 states and 370 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 19:22:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:21,910 INFO L93 Difference]: Finished difference Result 549 states and 804 transitions. [2023-02-15 19:22:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:22:21,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2023-02-15 19:22:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:21,913 INFO L225 Difference]: With dead ends: 549 [2023-02-15 19:22:21,913 INFO L226 Difference]: Without dead ends: 409 [2023-02-15 19:22:21,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-02-15 19:22:21,914 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 300 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:21,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1816 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:22:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-02-15 19:22:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 359. [2023-02-15 19:22:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 286 states have (on average 1.2832167832167831) internal successors, (367), 300 states have internal predecessors, (367), 46 states have call successors, (46), 12 states have call predecessors, (46), 26 states have return successors, (109), 46 states have call predecessors, (109), 45 states have call successors, (109) [2023-02-15 19:22:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 522 transitions. [2023-02-15 19:22:21,942 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 522 transitions. Word has length 49 [2023-02-15 19:22:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:21,942 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 522 transitions. [2023-02-15 19:22:21,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 19:22:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 522 transitions. [2023-02-15 19:22:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 19:22:21,943 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:21,943 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] [2023-02-15 19:22:21,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:22,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 19:22:22,148 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash 837231914, now seen corresponding path program 1 times [2023-02-15 19:22:22,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:22,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844589323] [2023-02-15 19:22:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:22,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:22:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 19:22:22,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:22,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844589323] [2023-02-15 19:22:22,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844589323] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:22,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:22,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 19:22:22,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066025157] [2023-02-15 19:22:22,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:22,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 19:22:22,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:22,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 19:22:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:22:22,424 INFO L87 Difference]: Start difference. First operand 359 states and 522 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 19:22:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:22,707 INFO L93 Difference]: Finished difference Result 518 states and 748 transitions. [2023-02-15 19:22:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 19:22:22,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-02-15 19:22:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:22,709 INFO L225 Difference]: With dead ends: 518 [2023-02-15 19:22:22,709 INFO L226 Difference]: Without dead ends: 396 [2023-02-15 19:22:22,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-02-15 19:22:22,710 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 135 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:22,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1471 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:22:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-15 19:22:22,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 371. [2023-02-15 19:22:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 297 states have (on average 1.2760942760942762) internal successors, (379), 309 states have internal predecessors, (379), 47 states have call successors, (47), 14 states have call predecessors, (47), 26 states have return successors, (103), 47 states have call predecessors, (103), 46 states have call successors, (103) [2023-02-15 19:22:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 529 transitions. [2023-02-15 19:22:22,739 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 529 transitions. Word has length 49 [2023-02-15 19:22:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:22,740 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 529 transitions. [2023-02-15 19:22:22,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 19:22:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 529 transitions. [2023-02-15 19:22:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 19:22:22,741 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:22,741 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] [2023-02-15 19:22:22,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 19:22:22,741 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:22,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:22,742 INFO L85 PathProgramCache]: Analyzing trace with hash 584790902, now seen corresponding path program 1 times [2023-02-15 19:22:22,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:22,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102537506] [2023-02-15 19:22:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:22,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:22:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 19:22:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-15 19:22:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:22,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:22,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102537506] [2023-02-15 19:22:22,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102537506] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:22,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6215007] [2023-02-15 19:22:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:22,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:22,945 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) [2023-02-15 19:22:22,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 19:22:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:22,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 19:22:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:23,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:23,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6215007] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:23,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:23,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 19:22:23,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430263534] [2023-02-15 19:22:23,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:23,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 19:22:23,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:23,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 19:22:23,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-15 19:22:23,308 INFO L87 Difference]: Start difference. First operand 371 states and 529 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 19:22:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:23,867 INFO L93 Difference]: Finished difference Result 457 states and 674 transitions. [2023-02-15 19:22:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 19:22:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2023-02-15 19:22:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:23,869 INFO L225 Difference]: With dead ends: 457 [2023-02-15 19:22:23,870 INFO L226 Difference]: Without dead ends: 425 [2023-02-15 19:22:23,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 19:22:23,871 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 358 mSDsluCounter, 1832 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:23,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1954 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 19:22:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-02-15 19:22:23,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 362. [2023-02-15 19:22:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 290 states have (on average 1.282758620689655) internal successors, (372), 302 states have internal predecessors, (372), 46 states have call successors, (46), 12 states have call predecessors, (46), 25 states have return successors, (100), 47 states have call predecessors, (100), 45 states have call successors, (100) [2023-02-15 19:22:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 518 transitions. [2023-02-15 19:22:23,896 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 518 transitions. Word has length 53 [2023-02-15 19:22:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:23,896 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 518 transitions. [2023-02-15 19:22:23,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 19:22:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 518 transitions. [2023-02-15 19:22:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 19:22:23,897 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:23,898 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] [2023-02-15 19:22:23,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:24,102 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,SelfDestructingSolverStorable17 [2023-02-15 19:22:24,102 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1202108924, now seen corresponding path program 2 times [2023-02-15 19:22:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:24,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979678304] [2023-02-15 19:22:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:24,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:24,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:24,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:22:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:24,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 19:22:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:24,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-15 19:22:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:24,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:24,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979678304] [2023-02-15 19:22:24,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979678304] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:24,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485476448] [2023-02-15 19:22:24,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:22:24,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:24,305 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) [2023-02-15 19:22:24,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 19:22:24,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:22:24,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:22:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 19:22:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:24,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:22:24,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485476448] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:24,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:24,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 19:22:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765827298] [2023-02-15 19:22:24,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:24,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 19:22:24,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:24,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 19:22:24,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-15 19:22:24,697 INFO L87 Difference]: Start difference. First operand 362 states and 518 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 19:22:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:25,300 INFO L93 Difference]: Finished difference Result 445 states and 650 transitions. [2023-02-15 19:22:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 19:22:25,300 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2023-02-15 19:22:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:25,302 INFO L225 Difference]: With dead ends: 445 [2023-02-15 19:22:25,302 INFO L226 Difference]: Without dead ends: 431 [2023-02-15 19:22:25,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 19:22:25,303 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 241 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:25,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 2033 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 19:22:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-02-15 19:22:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 320. [2023-02-15 19:22:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 257 states have (on average 1.284046692607004) internal successors, (330), 268 states have internal predecessors, (330), 38 states have call successors, (38), 12 states have call predecessors, (38), 24 states have return successors, (77), 39 states have call predecessors, (77), 37 states have call successors, (77) [2023-02-15 19:22:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 445 transitions. [2023-02-15 19:22:25,328 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 445 transitions. Word has length 53 [2023-02-15 19:22:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:25,328 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 445 transitions. [2023-02-15 19:22:25,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 19:22:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 445 transitions. [2023-02-15 19:22:25,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 19:22:25,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:25,330 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] [2023-02-15 19:22:25,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:25,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:25,535 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:25,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1485657907, now seen corresponding path program 1 times [2023-02-15 19:22:25,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:25,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983498746] [2023-02-15 19:22:25,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:25,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:25,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:25,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:25,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:22:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:22:25,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:25,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983498746] [2023-02-15 19:22:25,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983498746] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:25,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402966083] [2023-02-15 19:22:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:25,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:25,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:25,668 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:22:25,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 19:22:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 19:22:25,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:22:25,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:22:25,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402966083] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:25,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 19:22:25,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-02-15 19:22:25,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549468857] [2023-02-15 19:22:25,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:25,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:22:25,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:25,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:22:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:22:25,750 INFO L87 Difference]: Start difference. First operand 320 states and 445 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:25,806 INFO L93 Difference]: Finished difference Result 461 states and 677 transitions. [2023-02-15 19:22:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:22:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-15 19:22:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:25,808 INFO L225 Difference]: With dead ends: 461 [2023-02-15 19:22:25,808 INFO L226 Difference]: Without dead ends: 332 [2023-02-15 19:22:25,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:22:25,811 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 2 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:25,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 288 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:22:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-02-15 19:22:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 326. [2023-02-15 19:22:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 263 states have (on average 1.2775665399239544) internal successors, (336), 274 states have internal predecessors, (336), 38 states have call successors, (38), 12 states have call predecessors, (38), 24 states have return successors, (77), 39 states have call predecessors, (77), 37 states have call successors, (77) [2023-02-15 19:22:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 451 transitions. [2023-02-15 19:22:25,886 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 451 transitions. Word has length 52 [2023-02-15 19:22:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:25,887 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 451 transitions. [2023-02-15 19:22:25,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:25,887 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 451 transitions. [2023-02-15 19:22:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 19:22:25,887 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:25,887 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] [2023-02-15 19:22:25,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:26,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:26,100 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:26,100 INFO L85 PathProgramCache]: Analyzing trace with hash 676311281, now seen corresponding path program 1 times [2023-02-15 19:22:26,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:26,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4455071] [2023-02-15 19:22:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:26,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:26,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:26,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:22:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:22:26,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4455071] [2023-02-15 19:22:26,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4455071] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:26,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962692754] [2023-02-15 19:22:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:26,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:26,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:26,520 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:22:26,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 19:22:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:26,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 19:22:26,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:22:29,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:22:31,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962692754] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:31,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:31,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 50 [2023-02-15 19:22:31,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177702006] [2023-02-15 19:22:31,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:31,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 19:22:31,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:31,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 19:22:31,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2288, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 19:22:31,014 INFO L87 Difference]: Start difference. First operand 326 states and 451 transitions. Second operand has 50 states, 44 states have (on average 2.022727272727273) internal successors, (89), 39 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 19:22:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:34,694 INFO L93 Difference]: Finished difference Result 767 states and 1227 transitions. [2023-02-15 19:22:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 19:22:34,695 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 44 states have (on average 2.022727272727273) internal successors, (89), 39 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2023-02-15 19:22:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:34,699 INFO L225 Difference]: With dead ends: 767 [2023-02-15 19:22:34,699 INFO L226 Difference]: Without dead ends: 666 [2023-02-15 19:22:34,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=428, Invalid=5734, Unknown=0, NotChecked=0, Total=6162 [2023-02-15 19:22:34,702 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 554 mSDsluCounter, 5543 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 5745 SdHoareTripleChecker+Invalid, 2969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:34,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 5745 Invalid, 2969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2851 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-02-15 19:22:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-02-15 19:22:34,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 382. [2023-02-15 19:22:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 309 states have (on average 1.27831715210356) internal successors, (395), 323 states have internal predecessors, (395), 43 states have call successors, (43), 14 states have call predecessors, (43), 29 states have return successors, (91), 44 states have call predecessors, (91), 42 states have call successors, (91) [2023-02-15 19:22:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 529 transitions. [2023-02-15 19:22:34,765 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 529 transitions. Word has length 52 [2023-02-15 19:22:34,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:34,765 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 529 transitions. [2023-02-15 19:22:34,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 44 states have (on average 2.022727272727273) internal successors, (89), 39 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 19:22:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 529 transitions. [2023-02-15 19:22:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 19:22:34,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:34,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:22:34,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:34,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-15 19:22:34,992 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1341445802, now seen corresponding path program 1 times [2023-02-15 19:22:34,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:34,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004133868] [2023-02-15 19:22:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:34,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:22:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 19:22:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:22:35,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:35,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004133868] [2023-02-15 19:22:35,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004133868] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:35,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:35,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 19:22:35,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439313054] [2023-02-15 19:22:35,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:35,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:22:35,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:35,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:22:35,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:22:35,092 INFO L87 Difference]: Start difference. First operand 382 states and 529 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:22:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:35,169 INFO L93 Difference]: Finished difference Result 449 states and 611 transitions. [2023-02-15 19:22:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:22:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-02-15 19:22:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:35,171 INFO L225 Difference]: With dead ends: 449 [2023-02-15 19:22:35,171 INFO L226 Difference]: Without dead ends: 363 [2023-02-15 19:22:35,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:22:35,173 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 20 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:35,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 776 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:22:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-02-15 19:22:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2023-02-15 19:22:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 295 states have (on average 1.2881355932203389) internal successors, (380), 308 states have internal predecessors, (380), 41 states have call successors, (41), 12 states have call predecessors, (41), 26 states have return successors, (83), 42 states have call predecessors, (83), 40 states have call successors, (83) [2023-02-15 19:22:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 504 transitions. [2023-02-15 19:22:35,211 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 504 transitions. Word has length 53 [2023-02-15 19:22:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:35,212 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 504 transitions. [2023-02-15 19:22:35,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:22:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 504 transitions. [2023-02-15 19:22:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 19:22:35,213 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:35,213 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] [2023-02-15 19:22:35,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 19:22:35,213 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:35,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:35,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1795058933, now seen corresponding path program 1 times [2023-02-15 19:22:35,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:35,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276863062] [2023-02-15 19:22:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:35,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:22:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:22:35,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:35,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276863062] [2023-02-15 19:22:35,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276863062] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:22:35,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:22:35,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 19:22:35,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56637350] [2023-02-15 19:22:35,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:22:35,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 19:22:35,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 19:22:35,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-15 19:22:35,314 INFO L87 Difference]: Start difference. First operand 363 states and 504 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:35,508 INFO L93 Difference]: Finished difference Result 865 states and 1328 transitions. [2023-02-15 19:22:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 19:22:35,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-15 19:22:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:35,511 INFO L225 Difference]: With dead ends: 865 [2023-02-15 19:22:35,512 INFO L226 Difference]: Without dead ends: 756 [2023-02-15 19:22:35,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:22:35,513 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 294 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:35,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1045 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:22:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-02-15 19:22:35,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 458. [2023-02-15 19:22:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 375 states have (on average 1.296) internal successors, (486), 393 states have internal predecessors, (486), 49 states have call successors, (49), 14 states have call predecessors, (49), 33 states have return successors, (99), 50 states have call predecessors, (99), 48 states have call successors, (99) [2023-02-15 19:22:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 634 transitions. [2023-02-15 19:22:35,570 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 634 transitions. Word has length 52 [2023-02-15 19:22:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:35,570 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 634 transitions. [2023-02-15 19:22:35,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 19:22:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 634 transitions. [2023-02-15 19:22:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 19:22:35,571 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:35,571 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] [2023-02-15 19:22:35,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 19:22:35,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:35,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1208252919, now seen corresponding path program 2 times [2023-02-15 19:22:35,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:35,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016196805] [2023-02-15 19:22:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:35,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:22:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:22:35,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:35,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016196805] [2023-02-15 19:22:35,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016196805] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:35,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803420966] [2023-02-15 19:22:35,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:22:35,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:35,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:35,666 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:22:35,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 19:22:35,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:22:35,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:22:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 19:22:35,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:22:35,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:22:35,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803420966] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:35,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:35,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 15 [2023-02-15 19:22:35,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020231363] [2023-02-15 19:22:35,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:35,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 19:22:35,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:35,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 19:22:35,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:22:35,899 INFO L87 Difference]: Start difference. First operand 458 states and 634 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 19:22:36,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:36,072 INFO L93 Difference]: Finished difference Result 609 states and 831 transitions. [2023-02-15 19:22:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 19:22:36,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2023-02-15 19:22:36,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:36,074 INFO L225 Difference]: With dead ends: 609 [2023-02-15 19:22:36,074 INFO L226 Difference]: Without dead ends: 471 [2023-02-15 19:22:36,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2023-02-15 19:22:36,074 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 99 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:36,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1090 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:22:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-02-15 19:22:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 449. [2023-02-15 19:22:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 366 states have (on average 1.289617486338798) internal successors, (472), 384 states have internal predecessors, (472), 49 states have call successors, (49), 14 states have call predecessors, (49), 33 states have return successors, (99), 50 states have call predecessors, (99), 48 states have call successors, (99) [2023-02-15 19:22:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 620 transitions. [2023-02-15 19:22:36,121 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 620 transitions. Word has length 52 [2023-02-15 19:22:36,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:36,121 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 620 transitions. [2023-02-15 19:22:36,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 19:22:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 620 transitions. [2023-02-15 19:22:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 19:22:36,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:36,122 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] [2023-02-15 19:22:36,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:36,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:36,330 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:36,331 INFO L85 PathProgramCache]: Analyzing trace with hash 187184565, now seen corresponding path program 1 times [2023-02-15 19:22:36,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:36,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667687215] [2023-02-15 19:22:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:36,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:36,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:36,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:36,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 19:22:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:22:36,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:36,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667687215] [2023-02-15 19:22:36,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667687215] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:36,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782674097] [2023-02-15 19:22:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:36,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:36,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:36,729 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:22:36,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 19:22:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:36,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 19:22:36,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:22:38,390 INFO L328 TraceCheckSpWp]: Computing backward predicates...