./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 b5317dae 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-?-b5317da-m [2023-02-16 00:43:16,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:43:16,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:43:16,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:43:16,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:43:16,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:43:16,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:43:16,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:43:16,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:43:16,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:43:16,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:43:16,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:43:16,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:43:16,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:43:16,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:43:16,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:43:16,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:43:16,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:43:16,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:43:16,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:43:16,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:43:16,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:43:16,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:43:16,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:43:16,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:43:16,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:43:16,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:43:16,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:43:16,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:43:16,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:43:16,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:43:16,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:43:16,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:43:16,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:43:16,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:43:16,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:43:16,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:43:16,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:43:16,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:43:16,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:43:16,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:43:16,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:43:16,127 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:43:16,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:43:16,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:43:16,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:43:16,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:43:16,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:43:16,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:43:16,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:43:16,129 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:43:16,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:43:16,129 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:43:16,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:43:16,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:43:16,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:43:16,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:43:16,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:43:16,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:43:16,131 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:43:16,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:43:16,131 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:43:16,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:43:16,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:43:16,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:43:16,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:43:16,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:43:16,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:43:16,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:43:16,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:43:16,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:43:16,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:43:16,133 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:43:16,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:43:16,133 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:43:16,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:43:16,134 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:43:16,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2023-02-16 00:43:16,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:43:16,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:43:16,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:43:16,307 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:43:16,308 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:43:16,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-02-16 00:43:17,241 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:43:17,446 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:43:17,446 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-02-16 00:43:17,451 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a397ddf5/fa8aead2e29e4529a87525b04a5114de/FLAG351794d7a [2023-02-16 00:43:17,460 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a397ddf5/fa8aead2e29e4529a87525b04a5114de [2023-02-16 00:43:17,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:43:17,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:43:17,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:43:17,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:43:17,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:43:17,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eee0669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17, skipping insertion in model container [2023-02-16 00:43:17,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:43:17,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:43:17,565 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] [2023-02-16 00:43:17,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:43:17,599 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:43:17,606 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] [2023-02-16 00:43:17,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:43:17,643 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:43:17,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17 WrapperNode [2023-02-16 00:43:17,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:43:17,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:43:17,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:43:17,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:43:17,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,668 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-02-16 00:43:17,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:43:17,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:43:17,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:43:17,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:43:17,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,687 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:43:17,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:43:17,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:43:17,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:43:17,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (1/1) ... [2023-02-16 00:43:17,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:43:17,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:17,712 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) [2023-02-16 00:43:17,725 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 [2023-02-16 00:43:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:43:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:43:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-16 00:43:17,740 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-16 00:43:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:43:17,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:43:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-02-16 00:43:17,741 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-02-16 00:43:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 00:43:17,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 00:43:17,787 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:43:17,789 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:43:17,998 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:43:18,003 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:43:18,003 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-16 00:43:18,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:43:18 BoogieIcfgContainer [2023-02-16 00:43:18,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:43:18,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:43:18,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:43:18,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:43:18,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:43:17" (1/3) ... [2023-02-16 00:43:18,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70da9023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:43:18, skipping insertion in model container [2023-02-16 00:43:18,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:43:17" (2/3) ... [2023-02-16 00:43:18,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70da9023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:43:18, skipping insertion in model container [2023-02-16 00:43:18,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:43:18" (3/3) ... [2023-02-16 00:43:18,035 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2023-02-16 00:43:18,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:43:18,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 00:43:18,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:43:18,159 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;@4d603507, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:43:18,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 00:43:18,162 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) [2023-02-16 00:43:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 00:43:18,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:18,168 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] [2023-02-16 00:43:18,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1494196714, now seen corresponding path program 1 times [2023-02-16 00:43:18,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:18,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925258820] [2023-02-16 00:43:18,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:18,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:18,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:18,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:18,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 00:43:18,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:18,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925258820] [2023-02-16 00:43:18,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925258820] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:18,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607404827] [2023-02-16 00:43:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:18,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:18,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:18,604 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) [2023-02-16 00:43:18,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 00:43:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 00:43:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 00:43:18,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 00:43:18,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607404827] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:18,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:43:18,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 5] total 13 [2023-02-16 00:43:18,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750277661] [2023-02-16 00:43:18,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:18,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:43:18,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:43:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-16 00:43:18,860 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) [2023-02-16 00:43:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:18,902 INFO L93 Difference]: Finished difference Result 152 states and 239 transitions. [2023-02-16 00:43:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:43:18,904 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 [2023-02-16 00:43:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:18,911 INFO L225 Difference]: With dead ends: 152 [2023-02-16 00:43:18,911 INFO L226 Difference]: Without dead ends: 75 [2023-02-16 00:43:18,914 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 [2023-02-16 00:43:18,916 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 [2023-02-16 00:43:18,917 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] [2023-02-16 00:43:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-16 00:43:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-02-16 00:43:18,965 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) [2023-02-16 00:43:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 103 transitions. [2023-02-16 00:43:18,972 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 103 transitions. Word has length 39 [2023-02-16 00:43:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:18,979 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 103 transitions. [2023-02-16 00:43:18,980 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) [2023-02-16 00:43:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 103 transitions. [2023-02-16 00:43:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 00:43:18,983 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:18,984 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] [2023-02-16 00:43:18,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:19,189 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 [2023-02-16 00:43:19,189 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:19,190 INFO L85 PathProgramCache]: Analyzing trace with hash 237309308, now seen corresponding path program 1 times [2023-02-16 00:43:19,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:19,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141977516] [2023-02-16 00:43:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:19,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:19,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:19,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:19,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 00:43:19,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:19,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141977516] [2023-02-16 00:43:19,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141977516] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:19,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103832198] [2023-02-16 00:43:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:19,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:19,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:19,421 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) [2023-02-16 00:43:19,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 00:43:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:19,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 00:43:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 00:43:19,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 00:43:19,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103832198] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:43:19,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:43:19,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-16 00:43:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10265278] [2023-02-16 00:43:19,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:43:19,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 00:43:19,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 00:43:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-16 00:43:19,707 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) [2023-02-16 00:43:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:19,867 INFO L93 Difference]: Finished difference Result 193 states and 282 transitions. [2023-02-16 00:43:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 00:43:19,867 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 [2023-02-16 00:43:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:19,869 INFO L225 Difference]: With dead ends: 193 [2023-02-16 00:43:19,869 INFO L226 Difference]: Without dead ends: 148 [2023-02-16 00:43:19,870 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 [2023-02-16 00:43:19,871 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 [2023-02-16 00:43:19,871 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] [2023-02-16 00:43:19,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-16 00:43:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2023-02-16 00:43:19,879 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) [2023-02-16 00:43:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2023-02-16 00:43:19,880 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 40 [2023-02-16 00:43:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:19,881 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2023-02-16 00:43:19,881 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) [2023-02-16 00:43:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2023-02-16 00:43:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 00:43:19,882 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:19,882 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] [2023-02-16 00:43:19,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:20,089 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 [2023-02-16 00:43:20,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:20,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:20,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1042554370, now seen corresponding path program 1 times [2023-02-16 00:43:20,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:20,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633127446] [2023-02-16 00:43:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:20,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 00:43:20,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:20,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633127446] [2023-02-16 00:43:20,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633127446] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:43:20,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:43:20,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 00:43:20,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938107164] [2023-02-16 00:43:20,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:20,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 00:43:20,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 00:43:20,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-16 00:43:20,172 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) [2023-02-16 00:43:20,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:20,222 INFO L93 Difference]: Finished difference Result 208 states and 297 transitions. [2023-02-16 00:43:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 00:43:20,223 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 [2023-02-16 00:43:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:20,224 INFO L225 Difference]: With dead ends: 208 [2023-02-16 00:43:20,224 INFO L226 Difference]: Without dead ends: 134 [2023-02-16 00:43:20,225 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 [2023-02-16 00:43:20,225 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 [2023-02-16 00:43:20,226 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] [2023-02-16 00:43:20,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-16 00:43:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2023-02-16 00:43:20,232 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) [2023-02-16 00:43:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2023-02-16 00:43:20,233 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 40 [2023-02-16 00:43:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:20,233 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2023-02-16 00:43:20,234 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) [2023-02-16 00:43:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2023-02-16 00:43:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 00:43:20,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:20,235 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] [2023-02-16 00:43:20,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 00:43:20,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1148734548, now seen corresponding path program 1 times [2023-02-16 00:43:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:20,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139740638] [2023-02-16 00:43:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:20,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-16 00:43:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-16 00:43:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 00:43:20,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:20,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139740638] [2023-02-16 00:43:20,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139740638] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:43:20,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:43:20,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-16 00:43:20,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156989758] [2023-02-16 00:43:20,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:20,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 00:43:20,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:20,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 00:43:20,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-16 00:43:20,410 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) [2023-02-16 00:43:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:20,547 INFO L93 Difference]: Finished difference Result 179 states and 256 transitions. [2023-02-16 00:43:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 00:43:20,548 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 [2023-02-16 00:43:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:20,549 INFO L225 Difference]: With dead ends: 179 [2023-02-16 00:43:20,549 INFO L226 Difference]: Without dead ends: 168 [2023-02-16 00:43:20,549 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 [2023-02-16 00:43:20,550 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 [2023-02-16 00:43:20,550 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] [2023-02-16 00:43:20,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-16 00:43:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2023-02-16 00:43:20,560 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) [2023-02-16 00:43:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 222 transitions. [2023-02-16 00:43:20,562 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 222 transitions. Word has length 44 [2023-02-16 00:43:20,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:20,562 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 222 transitions. [2023-02-16 00:43:20,562 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) [2023-02-16 00:43:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 222 transitions. [2023-02-16 00:43:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 00:43:20,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:20,564 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] [2023-02-16 00:43:20,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 00:43:20,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash -447669970, now seen corresponding path program 1 times [2023-02-16 00:43:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:20,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732148334] [2023-02-16 00:43:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:20,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-16 00:43:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-16 00:43:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 00:43:20,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:20,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732148334] [2023-02-16 00:43:20,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732148334] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:43:20,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:43:20,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-16 00:43:20,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237184957] [2023-02-16 00:43:20,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:20,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 00:43:20,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:20,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 00:43:20,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-16 00:43:20,778 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) [2023-02-16 00:43:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:21,015 INFO L93 Difference]: Finished difference Result 187 states and 266 transitions. [2023-02-16 00:43:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 00:43:21,016 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 [2023-02-16 00:43:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:21,017 INFO L225 Difference]: With dead ends: 187 [2023-02-16 00:43:21,017 INFO L226 Difference]: Without dead ends: 179 [2023-02-16 00:43:21,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-02-16 00:43:21,018 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 [2023-02-16 00:43:21,018 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] [2023-02-16 00:43:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-16 00:43:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2023-02-16 00:43:21,026 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) [2023-02-16 00:43:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 233 transitions. [2023-02-16 00:43:21,028 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 233 transitions. Word has length 44 [2023-02-16 00:43:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:21,028 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 233 transitions. [2023-02-16 00:43:21,028 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) [2023-02-16 00:43:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 233 transitions. [2023-02-16 00:43:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 00:43:21,029 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:21,029 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] [2023-02-16 00:43:21,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 00:43:21,030 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:21,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1178693971, now seen corresponding path program 1 times [2023-02-16 00:43:21,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:21,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173736141] [2023-02-16 00:43:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:21,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 00:43:21,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:21,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173736141] [2023-02-16 00:43:21,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173736141] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:43:21,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:43:21,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 00:43:21,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156938911] [2023-02-16 00:43:21,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:21,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 00:43:21,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:21,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 00:43:21,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-16 00:43:21,092 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) [2023-02-16 00:43:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:21,174 INFO L93 Difference]: Finished difference Result 374 states and 549 transitions. [2023-02-16 00:43:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 00:43:21,175 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 [2023-02-16 00:43:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:21,176 INFO L225 Difference]: With dead ends: 374 [2023-02-16 00:43:21,176 INFO L226 Difference]: Without dead ends: 275 [2023-02-16 00:43:21,177 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 [2023-02-16 00:43:21,177 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 [2023-02-16 00:43:21,177 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] [2023-02-16 00:43:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-02-16 00:43:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 241. [2023-02-16 00:43:21,187 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) [2023-02-16 00:43:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 351 transitions. [2023-02-16 00:43:21,188 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 351 transitions. Word has length 44 [2023-02-16 00:43:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:21,189 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 351 transitions. [2023-02-16 00:43:21,189 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) [2023-02-16 00:43:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 351 transitions. [2023-02-16 00:43:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 00:43:21,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:21,190 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] [2023-02-16 00:43:21,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 00:43:21,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:21,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:21,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1988040597, now seen corresponding path program 1 times [2023-02-16 00:43:21,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:21,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158039637] [2023-02-16 00:43:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:21,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 00:43:21,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:21,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158039637] [2023-02-16 00:43:21,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158039637] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609480974] [2023-02-16 00:43:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:21,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:21,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:21,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:43:21,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 00:43:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 00:43:21,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 00:43:21,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 00:43:21,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609480974] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:21,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:43:21,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 15 [2023-02-16 00:43:21,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780795882] [2023-02-16 00:43:21,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:21,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:43:21,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:21,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:43:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-16 00:43:21,443 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) [2023-02-16 00:43:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:21,464 INFO L93 Difference]: Finished difference Result 375 states and 544 transitions. [2023-02-16 00:43:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 00:43:21,464 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 [2023-02-16 00:43:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:21,466 INFO L225 Difference]: With dead ends: 375 [2023-02-16 00:43:21,466 INFO L226 Difference]: Without dead ends: 203 [2023-02-16 00:43:21,466 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 [2023-02-16 00:43:21,467 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 [2023-02-16 00:43:21,467 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] [2023-02-16 00:43:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-16 00:43:21,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 181. [2023-02-16 00:43:21,474 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) [2023-02-16 00:43:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 259 transitions. [2023-02-16 00:43:21,475 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 259 transitions. Word has length 44 [2023-02-16 00:43:21,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:21,476 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 259 transitions. [2023-02-16 00:43:21,476 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) [2023-02-16 00:43:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 259 transitions. [2023-02-16 00:43:21,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 00:43:21,476 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:21,477 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] [2023-02-16 00:43:21,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:21,682 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 [2023-02-16 00:43:21,682 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1299374066, now seen corresponding path program 1 times [2023-02-16 00:43:21,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:21,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519472052] [2023-02-16 00:43:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:21,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-16 00:43:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-16 00:43:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 00:43:21,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:21,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519472052] [2023-02-16 00:43:21,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519472052] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:43:21,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:43:21,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:43:21,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621044628] [2023-02-16 00:43:21,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:21,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:43:21,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:21,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:43:21,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:43:21,731 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) [2023-02-16 00:43:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:21,763 INFO L93 Difference]: Finished difference Result 189 states and 266 transitions. [2023-02-16 00:43:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 00:43:21,764 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 [2023-02-16 00:43:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:21,765 INFO L225 Difference]: With dead ends: 189 [2023-02-16 00:43:21,765 INFO L226 Difference]: Without dead ends: 178 [2023-02-16 00:43:21,765 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 [2023-02-16 00:43:21,766 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 [2023-02-16 00:43:21,766 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] [2023-02-16 00:43:21,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-16 00:43:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2023-02-16 00:43:21,772 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) [2023-02-16 00:43:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 249 transitions. [2023-02-16 00:43:21,773 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 249 transitions. Word has length 46 [2023-02-16 00:43:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:21,773 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 249 transitions. [2023-02-16 00:43:21,774 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) [2023-02-16 00:43:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 249 transitions. [2023-02-16 00:43:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-16 00:43:21,774 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:21,774 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] [2023-02-16 00:43:21,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-16 00:43:21,775 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:21,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:21,775 INFO L85 PathProgramCache]: Analyzing trace with hash -662590119, now seen corresponding path program 1 times [2023-02-16 00:43:21,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:21,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59394846] [2023-02-16 00:43:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:21,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 00:43:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-16 00:43:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 00:43:21,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:21,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59394846] [2023-02-16 00:43:21,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59394846] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:43:21,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:43:21,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-16 00:43:21,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302090493] [2023-02-16 00:43:21,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:21,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 00:43:21,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:21,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 00:43:21,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:43:21,889 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) [2023-02-16 00:43:22,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:22,036 INFO L93 Difference]: Finished difference Result 229 states and 323 transitions. [2023-02-16 00:43:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:43:22,036 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 [2023-02-16 00:43:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:22,038 INFO L225 Difference]: With dead ends: 229 [2023-02-16 00:43:22,038 INFO L226 Difference]: Without dead ends: 218 [2023-02-16 00:43:22,038 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 [2023-02-16 00:43:22,038 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 [2023-02-16 00:43:22,039 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] [2023-02-16 00:43:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-16 00:43:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 182. [2023-02-16 00:43:22,048 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) [2023-02-16 00:43:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 260 transitions. [2023-02-16 00:43:22,049 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 260 transitions. Word has length 48 [2023-02-16 00:43:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:22,050 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 260 transitions. [2023-02-16 00:43:22,050 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) [2023-02-16 00:43:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 260 transitions. [2023-02-16 00:43:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-16 00:43:22,051 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:22,051 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] [2023-02-16 00:43:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-16 00:43:22,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash 38474459, now seen corresponding path program 1 times [2023-02-16 00:43:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:22,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451018167] [2023-02-16 00:43:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:22,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:22,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:22,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:22,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 00:43:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:22,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-16 00:43:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:22,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:22,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451018167] [2023-02-16 00:43:22,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451018167] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:22,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101501302] [2023-02-16 00:43:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:22,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:22,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:22,245 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) [2023-02-16 00:43:22,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 00:43:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 00:43:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 00:43:22,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:22,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101501302] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:43:22,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:43:22,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-16 00:43:22,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116688959] [2023-02-16 00:43:22,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:43:22,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 00:43:22,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:22,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 00:43:22,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-16 00:43:22,746 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) [2023-02-16 00:43:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:24,170 INFO L93 Difference]: Finished difference Result 352 states and 515 transitions. [2023-02-16 00:43:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-16 00:43:24,171 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 [2023-02-16 00:43:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:24,172 INFO L225 Difference]: With dead ends: 352 [2023-02-16 00:43:24,172 INFO L226 Difference]: Without dead ends: 340 [2023-02-16 00:43:24,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2023-02-16 00:43:24,174 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 [2023-02-16 00:43:24,174 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] [2023-02-16 00:43:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-16 00:43:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 221. [2023-02-16 00:43:24,187 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) [2023-02-16 00:43:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 327 transitions. [2023-02-16 00:43:24,188 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 327 transitions. Word has length 48 [2023-02-16 00:43:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:24,188 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 327 transitions. [2023-02-16 00:43:24,189 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) [2023-02-16 00:43:24,189 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 327 transitions. [2023-02-16 00:43:24,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-16 00:43:24,189 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:24,189 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] [2023-02-16 00:43:24,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:24,402 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 [2023-02-16 00:43:24,402 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:24,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1608873757, now seen corresponding path program 2 times [2023-02-16 00:43:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:24,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737127464] [2023-02-16 00:43:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:24,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:24,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:24,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:24,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 00:43:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:24,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 00:43:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:24,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-16 00:43:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:24,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:24,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737127464] [2023-02-16 00:43:24,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737127464] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:24,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406540738] [2023-02-16 00:43:24,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:43:24,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:24,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:24,594 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) [2023-02-16 00:43:24,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 00:43:24,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:43:24,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:43:24,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 00:43:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 00:43:24,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:25,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406540738] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:43:25,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:43:25,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-16 00:43:25,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185386223] [2023-02-16 00:43:25,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:43:25,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 00:43:25,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:25,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 00:43:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-16 00:43:25,092 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) [2023-02-16 00:43:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:26,677 INFO L93 Difference]: Finished difference Result 393 states and 624 transitions. [2023-02-16 00:43:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-16 00:43:26,679 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 [2023-02-16 00:43:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:26,681 INFO L225 Difference]: With dead ends: 393 [2023-02-16 00:43:26,681 INFO L226 Difference]: Without dead ends: 380 [2023-02-16 00:43:26,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=357, Invalid=3183, Unknown=0, NotChecked=0, Total=3540 [2023-02-16 00:43:26,683 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, 1.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:43:26,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 4246 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-16 00:43:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-16 00:43:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 241. [2023-02-16 00:43:26,699 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) [2023-02-16 00:43:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 384 transitions. [2023-02-16 00:43:26,702 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 384 transitions. Word has length 48 [2023-02-16 00:43:26,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:26,702 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 384 transitions. [2023-02-16 00:43:26,702 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) [2023-02-16 00:43:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 384 transitions. [2023-02-16 00:43:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-16 00:43:26,703 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:26,704 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] [2023-02-16 00:43:26,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:26,909 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 [2023-02-16 00:43:26,909 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:26,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:26,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1889190333, now seen corresponding path program 1 times [2023-02-16 00:43:26,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:26,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296848396] [2023-02-16 00:43:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:26,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:26,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:26,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:26,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-16 00:43:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 00:43:26,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:26,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296848396] [2023-02-16 00:43:26,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296848396] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:26,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177542443] [2023-02-16 00:43:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:26,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:26,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:26,989 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) [2023-02-16 00:43:26,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 00:43:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:27,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 00:43:27,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 00:43:27,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 00:43:27,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177542443] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:43:27,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:43:27,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-16 00:43:27,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140932582] [2023-02-16 00:43:27,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:43:27,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 00:43:27,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:27,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 00:43:27,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-16 00:43:27,191 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) [2023-02-16 00:43:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:27,292 INFO L93 Difference]: Finished difference Result 348 states and 535 transitions. [2023-02-16 00:43:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 00:43:27,293 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 [2023-02-16 00:43:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:27,294 INFO L225 Difference]: With dead ends: 348 [2023-02-16 00:43:27,294 INFO L226 Difference]: Without dead ends: 252 [2023-02-16 00:43:27,295 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 [2023-02-16 00:43:27,295 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 [2023-02-16 00:43:27,295 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] [2023-02-16 00:43:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-02-16 00:43:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 228. [2023-02-16 00:43:27,311 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) [2023-02-16 00:43:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 341 transitions. [2023-02-16 00:43:27,313 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 341 transitions. Word has length 49 [2023-02-16 00:43:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:27,313 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 341 transitions. [2023-02-16 00:43:27,313 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) [2023-02-16 00:43:27,313 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 341 transitions. [2023-02-16 00:43:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-16 00:43:27,314 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:27,314 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] [2023-02-16 00:43:27,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:27,521 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 [2023-02-16 00:43:27,521 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:27,521 INFO L85 PathProgramCache]: Analyzing trace with hash 698178595, now seen corresponding path program 1 times [2023-02-16 00:43:27,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:27,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613428211] [2023-02-16 00:43:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:27,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:27,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:27,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:27,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 00:43:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:27,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-16 00:43:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 00:43:27,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:27,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613428211] [2023-02-16 00:43:27,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613428211] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:27,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623933100] [2023-02-16 00:43:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:27,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:27,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:27,654 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) [2023-02-16 00:43:27,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 00:43:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:27,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-16 00:43:27,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 00:43:27,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 00:43:27,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623933100] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:43:27,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:43:27,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2023-02-16 00:43:27,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788028124] [2023-02-16 00:43:27,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:43:27,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 00:43:27,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 00:43:27,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-02-16 00:43:27,951 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) [2023-02-16 00:43:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:28,378 INFO L93 Difference]: Finished difference Result 566 states and 863 transitions. [2023-02-16 00:43:28,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 00:43:28,379 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 [2023-02-16 00:43:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:28,380 INFO L225 Difference]: With dead ends: 566 [2023-02-16 00:43:28,380 INFO L226 Difference]: Without dead ends: 330 [2023-02-16 00:43:28,382 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 [2023-02-16 00:43:28,382 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 [2023-02-16 00:43:28,382 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] [2023-02-16 00:43:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-16 00:43:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 227. [2023-02-16 00:43:28,396 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) [2023-02-16 00:43:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 337 transitions. [2023-02-16 00:43:28,398 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 337 transitions. Word has length 50 [2023-02-16 00:43:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:28,398 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 337 transitions. [2023-02-16 00:43:28,398 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) [2023-02-16 00:43:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 337 transitions. [2023-02-16 00:43:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-16 00:43:28,399 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:28,399 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] [2023-02-16 00:43:28,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-16 00:43:28,604 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 [2023-02-16 00:43:28,604 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:28,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1308875237, now seen corresponding path program 2 times [2023-02-16 00:43:28,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:28,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550054105] [2023-02-16 00:43:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:28,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:28,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:28,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:28,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 00:43:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:28,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 00:43:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:28,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-16 00:43:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 00:43:28,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:28,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550054105] [2023-02-16 00:43:28,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550054105] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:28,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264793738] [2023-02-16 00:43:28,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:43:28,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:28,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:28,709 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) [2023-02-16 00:43:28,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 00:43:28,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:43:28,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:43:28,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-16 00:43:28,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 00:43:28,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:29,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264793738] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:43:29,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:43:29,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 10] total 21 [2023-02-16 00:43:29,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448567299] [2023-02-16 00:43:29,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:43:29,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-16 00:43:29,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:29,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-16 00:43:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-02-16 00:43:29,025 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) [2023-02-16 00:43:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:29,589 INFO L93 Difference]: Finished difference Result 494 states and 778 transitions. [2023-02-16 00:43:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-16 00:43:29,589 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 [2023-02-16 00:43:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:29,591 INFO L225 Difference]: With dead ends: 494 [2023-02-16 00:43:29,591 INFO L226 Difference]: Without dead ends: 478 [2023-02-16 00:43:29,592 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 [2023-02-16 00:43:29,592 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, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 00:43:29,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 1945 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 00:43:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-02-16 00:43:29,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 238. [2023-02-16 00:43:29,611 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) [2023-02-16 00:43:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 371 transitions. [2023-02-16 00:43:29,612 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 371 transitions. Word has length 50 [2023-02-16 00:43:29,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:29,612 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 371 transitions. [2023-02-16 00:43:29,612 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) [2023-02-16 00:43:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 371 transitions. [2023-02-16 00:43:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-16 00:43:29,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:29,614 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] [2023-02-16 00:43:29,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:29,820 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 [2023-02-16 00:43:29,821 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2061582742, now seen corresponding path program 1 times [2023-02-16 00:43:29,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:29,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535408061] [2023-02-16 00:43:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:29,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:29,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:29,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:29,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 00:43:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 00:43:29,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:29,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535408061] [2023-02-16 00:43:29,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535408061] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:43:29,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:43:29,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-16 00:43:29,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050891853] [2023-02-16 00:43:29,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:29,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 00:43:29,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:29,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 00:43:29,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:43:29,877 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) [2023-02-16 00:43:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:29,977 INFO L93 Difference]: Finished difference Result 378 states and 576 transitions. [2023-02-16 00:43:29,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:43:29,978 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 [2023-02-16 00:43:29,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:29,979 INFO L225 Difference]: With dead ends: 378 [2023-02-16 00:43:29,979 INFO L226 Difference]: Without dead ends: 260 [2023-02-16 00:43:29,981 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 [2023-02-16 00:43:29,981 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 [2023-02-16 00:43:29,981 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] [2023-02-16 00:43:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-16 00:43:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 238. [2023-02-16 00:43:29,999 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) [2023-02-16 00:43:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 370 transitions. [2023-02-16 00:43:30,000 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 370 transitions. Word has length 49 [2023-02-16 00:43:30,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:30,001 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 370 transitions. [2023-02-16 00:43:30,001 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) [2023-02-16 00:43:30,001 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 370 transitions. [2023-02-16 00:43:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-16 00:43:30,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:30,006 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] [2023-02-16 00:43:30,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-16 00:43:30,007 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:30,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:30,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1646578540, now seen corresponding path program 1 times [2023-02-16 00:43:30,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:30,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123849421] [2023-02-16 00:43:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:30,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:30,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:30,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:30,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 00:43:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 00:43:30,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123849421] [2023-02-16 00:43:30,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123849421] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649168334] [2023-02-16 00:43:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:30,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:30,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:30,082 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) [2023-02-16 00:43:30,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 00:43:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:30,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 00:43:30,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 00:43:30,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 00:43:30,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649168334] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:43:30,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:43:30,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-16 00:43:30,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637414257] [2023-02-16 00:43:30,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:43:30,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 00:43:30,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 00:43:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-02-16 00:43:30,217 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) [2023-02-16 00:43:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:30,346 INFO L93 Difference]: Finished difference Result 549 states and 804 transitions. [2023-02-16 00:43:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:43:30,347 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 [2023-02-16 00:43:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:30,348 INFO L225 Difference]: With dead ends: 549 [2023-02-16 00:43:30,348 INFO L226 Difference]: Without dead ends: 409 [2023-02-16 00:43:30,349 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 [2023-02-16 00:43:30,349 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 [2023-02-16 00:43:30,349 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] [2023-02-16 00:43:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-02-16 00:43:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 359. [2023-02-16 00:43:30,373 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) [2023-02-16 00:43:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 522 transitions. [2023-02-16 00:43:30,374 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 522 transitions. Word has length 49 [2023-02-16 00:43:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:30,375 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 522 transitions. [2023-02-16 00:43:30,375 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) [2023-02-16 00:43:30,375 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 522 transitions. [2023-02-16 00:43:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-16 00:43:30,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:30,376 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] [2023-02-16 00:43:30,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:30,580 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 [2023-02-16 00:43:30,581 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:30,581 INFO L85 PathProgramCache]: Analyzing trace with hash 837231914, now seen corresponding path program 1 times [2023-02-16 00:43:30,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:30,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361017549] [2023-02-16 00:43:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:30,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:30,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:30,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 00:43:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 00:43:30,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:30,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361017549] [2023-02-16 00:43:30,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361017549] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:43:30,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:43:30,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-16 00:43:30,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856708381] [2023-02-16 00:43:30,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:30,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 00:43:30,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:30,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 00:43:30,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-02-16 00:43:30,863 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) [2023-02-16 00:43:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:31,113 INFO L93 Difference]: Finished difference Result 518 states and 748 transitions. [2023-02-16 00:43:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 00:43:31,114 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 [2023-02-16 00:43:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:31,115 INFO L225 Difference]: With dead ends: 518 [2023-02-16 00:43:31,115 INFO L226 Difference]: Without dead ends: 396 [2023-02-16 00:43:31,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-02-16 00:43:31,116 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 [2023-02-16 00:43:31,116 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] [2023-02-16 00:43:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-16 00:43:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 371. [2023-02-16 00:43:31,145 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) [2023-02-16 00:43:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 529 transitions. [2023-02-16 00:43:31,146 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 529 transitions. Word has length 49 [2023-02-16 00:43:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:31,146 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 529 transitions. [2023-02-16 00:43:31,146 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) [2023-02-16 00:43:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 529 transitions. [2023-02-16 00:43:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 00:43:31,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:31,148 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] [2023-02-16 00:43:31,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-16 00:43:31,148 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash 584790902, now seen corresponding path program 1 times [2023-02-16 00:43:31,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:31,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180102833] [2023-02-16 00:43:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:31,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:31,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:31,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:31,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 00:43:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:31,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-16 00:43:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:31,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 00:43:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:31,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180102833] [2023-02-16 00:43:31,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180102833] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:31,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236035518] [2023-02-16 00:43:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:31,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:31,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:31,338 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) [2023-02-16 00:43:31,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 00:43:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:31,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-16 00:43:31,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:31,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:31,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236035518] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:43:31,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:43:31,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-16 00:43:31,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370533356] [2023-02-16 00:43:31,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:43:31,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-16 00:43:31,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-16 00:43:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-16 00:43:31,655 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) [2023-02-16 00:43:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:32,235 INFO L93 Difference]: Finished difference Result 457 states and 674 transitions. [2023-02-16 00:43:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 00:43:32,236 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 [2023-02-16 00:43:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:32,242 INFO L225 Difference]: With dead ends: 457 [2023-02-16 00:43:32,242 INFO L226 Difference]: Without dead ends: 425 [2023-02-16 00:43:32,243 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 [2023-02-16 00:43:32,243 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 358 mSDsluCounter, 1832 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-02-16 00:43:32,244 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] [2023-02-16 00:43:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-02-16 00:43:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 362. [2023-02-16 00:43:32,267 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) [2023-02-16 00:43:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 518 transitions. [2023-02-16 00:43:32,269 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 518 transitions. Word has length 53 [2023-02-16 00:43:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:32,269 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 518 transitions. [2023-02-16 00:43:32,269 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) [2023-02-16 00:43:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 518 transitions. [2023-02-16 00:43:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 00:43:32,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:32,270 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] [2023-02-16 00:43:32,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:32,475 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 [2023-02-16 00:43:32,475 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:32,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:32,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1202108924, now seen corresponding path program 2 times [2023-02-16 00:43:32,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:32,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795609790] [2023-02-16 00:43:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:32,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:32,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:32,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-16 00:43:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:32,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-16 00:43:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:32,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-16 00:43:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795609790] [2023-02-16 00:43:32,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795609790] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571468513] [2023-02-16 00:43:32,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:43:32,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:32,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:32,675 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) [2023-02-16 00:43:32,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 00:43:32,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:43:32,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:43:32,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-16 00:43:32,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:32,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:43:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 00:43:32,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571468513] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:43:32,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:43:32,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-16 00:43:32,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063111706] [2023-02-16 00:43:32,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:43:32,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-16 00:43:32,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:32,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-16 00:43:32,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-16 00:43:32,991 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) [2023-02-16 00:43:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:33,557 INFO L93 Difference]: Finished difference Result 445 states and 650 transitions. [2023-02-16 00:43:33,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 00:43:33,557 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 [2023-02-16 00:43:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:33,559 INFO L225 Difference]: With dead ends: 445 [2023-02-16 00:43:33,559 INFO L226 Difference]: Without dead ends: 431 [2023-02-16 00:43:33,560 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 [2023-02-16 00:43:33,560 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 241 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-02-16 00:43:33,560 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] [2023-02-16 00:43:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-02-16 00:43:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 320. [2023-02-16 00:43:33,583 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) [2023-02-16 00:43:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 445 transitions. [2023-02-16 00:43:33,584 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 445 transitions. Word has length 53 [2023-02-16 00:43:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:33,585 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 445 transitions. [2023-02-16 00:43:33,585 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) [2023-02-16 00:43:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 445 transitions. [2023-02-16 00:43:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 00:43:33,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:33,586 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] [2023-02-16 00:43:33,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:33,790 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 [2023-02-16 00:43:33,790 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:33,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1485657907, now seen corresponding path program 1 times [2023-02-16 00:43:33,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:33,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489983058] [2023-02-16 00:43:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:33,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:33,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:33,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:33,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-16 00:43:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 00:43:33,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:33,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489983058] [2023-02-16 00:43:33,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489983058] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:33,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469932797] [2023-02-16 00:43:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:33,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:33,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:33,900 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) [2023-02-16 00:43:33,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 00:43:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:33,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 00:43:33,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:43:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 00:43:33,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 00:43:33,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469932797] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:43:33,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 00:43:33,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-02-16 00:43:33,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689214365] [2023-02-16 00:43:33,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:43:33,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:43:33,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:43:33,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:43:33,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-16 00:43:33,972 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) [2023-02-16 00:43:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:43:34,001 INFO L93 Difference]: Finished difference Result 461 states and 677 transitions. [2023-02-16 00:43:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 00:43:34,002 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 [2023-02-16 00:43:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:43:34,003 INFO L225 Difference]: With dead ends: 461 [2023-02-16 00:43:34,003 INFO L226 Difference]: Without dead ends: 332 [2023-02-16 00:43:34,004 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 [2023-02-16 00:43:34,005 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 [2023-02-16 00:43:34,005 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] [2023-02-16 00:43:34,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-02-16 00:43:34,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 326. [2023-02-16 00:43:34,030 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) [2023-02-16 00:43:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 451 transitions. [2023-02-16 00:43:34,031 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 451 transitions. Word has length 52 [2023-02-16 00:43:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:43:34,031 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 451 transitions. [2023-02-16 00:43:34,031 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) [2023-02-16 00:43:34,031 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 451 transitions. [2023-02-16 00:43:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 00:43:34,033 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:43:34,033 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] [2023-02-16 00:43:34,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 00:43:34,237 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 [2023-02-16 00:43:34,237 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:43:34,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:43:34,238 INFO L85 PathProgramCache]: Analyzing trace with hash 676311281, now seen corresponding path program 1 times [2023-02-16 00:43:34,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:43:34,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429632553] [2023-02-16 00:43:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:34,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:43:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:34,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-16 00:43:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:34,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-16 00:43:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:34,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-16 00:43:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:43:34,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:43:34,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429632553] [2023-02-16 00:43:34,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429632553] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:43:34,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564208638] [2023-02-16 00:43:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:43:34,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:43:34,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:43:34,603 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) [2023-02-16 00:43:34,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 00:43:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:43:34,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-16 00:43:34,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:44:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:44:23,431 INFO L328 TraceCheckSpWp]: Computing backward predicates...