./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 a31fd051 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-?-a31fd05 [2023-02-15 10:22:56,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:22:56,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:22:56,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:22:56,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:22:56,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:22:56,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:22:56,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:22:56,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:22:56,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:22:56,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:22:56,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:22:56,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:22:56,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:22:56,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:22:56,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:22:56,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:22:56,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:22:56,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:22:56,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:22:56,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:22:56,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:22:56,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:22:56,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:22:56,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:22:56,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:22:56,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:22:56,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:22:56,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:22:56,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:22:56,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:22:56,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:22:56,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:22:56,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:22:56,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:22:56,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:22:56,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:22:56,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:22:56,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:22:56,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:22:56,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:22:56,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:22:56,119 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:22:56,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:22:56,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:22:56,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:22:56,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:22:56,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:22:56,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:22:56,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:22:56,122 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:22:56,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:22:56,122 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:22:56,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:22:56,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:22:56,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:22:56,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:22:56,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:22:56,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:22:56,123 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:22:56,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:22:56,123 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:22:56,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:22:56,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:22:56,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:22:56,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:22:56,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:22:56,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:22:56,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:22:56,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:22:56,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:22:56,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:22:56,129 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:22:56,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:22:56,129 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:22:56,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:22:56,129 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:22:56,129 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2023-02-15 10:22:56,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:22:56,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:22:56,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:22:56,324 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:22:56,324 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:22:56,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-02-15 10:22:57,335 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:22:57,497 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:22:57,497 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-02-15 10:22:57,504 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91ccd309c/994956e33a1f4d3cb3e2b5c8ca35ee90/FLAG3b67fdaca [2023-02-15 10:22:57,515 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91ccd309c/994956e33a1f4d3cb3e2b5c8ca35ee90 [2023-02-15 10:22:57,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:22:57,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:22:57,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:22:57,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:22:57,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:22:57,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df27773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57, skipping insertion in model container [2023-02-15 10:22:57,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:22:57,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:22:57,631 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2023-02-15 10:22:57,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:22:57,675 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:22:57,682 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2023-02-15 10:22:57,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:22:57,713 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:22:57,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57 WrapperNode [2023-02-15 10:22:57,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:22:57,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:22:57,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:22:57,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:22:57,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,735 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-02-15 10:22:57,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:22:57,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:22:57,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:22:57,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:22:57,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,751 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:22:57,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:22:57,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:22:57,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:22:57,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (1/1) ... [2023-02-15 10:22:57,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:22:57,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:57,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 10:22:57,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 10:22:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:22:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:22:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-15 10:22:57,820 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-15 10:22:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:22:57,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:22:57,821 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-02-15 10:22:57,821 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-02-15 10:22:57,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 10:22:57,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 10:22:57,871 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:22:57,873 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:22:58,123 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:22:58,128 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:22:58,128 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 10:22:58,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:22:58 BoogieIcfgContainer [2023-02-15 10:22:58,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:22:58,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:22:58,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:22:58,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:22:58,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:22:57" (1/3) ... [2023-02-15 10:22:58,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4a5203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:22:58, skipping insertion in model container [2023-02-15 10:22:58,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:22:57" (2/3) ... [2023-02-15 10:22:58,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4a5203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:22:58, skipping insertion in model container [2023-02-15 10:22:58,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:22:58" (3/3) ... [2023-02-15 10:22:58,135 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2023-02-15 10:22:58,145 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:22:58,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:22:58,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:22:58,178 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;@1b8ae959, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:22:58,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:22:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 62 states have (on average 1.564516129032258) internal successors, (97), 63 states have internal predecessors, (97), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 10:22:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 10:22:58,188 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:58,188 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:58,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1494196714, now seen corresponding path program 1 times [2023-02-15 10:22:58,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:58,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438277602] [2023-02-15 10:22:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:58,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:58,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:58,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:58,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:58,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:58,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438277602] [2023-02-15 10:22:58,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438277602] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:58,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172157290] [2023-02-15 10:22:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:58,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:58,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:58,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:58,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:22:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:58,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 10:22:58,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 10:22:58,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:22:58,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172157290] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:58,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:22:58,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 5] total 13 [2023-02-15 10:22:58,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120131110] [2023-02-15 10:22:58,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:22:58,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:22:58,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:22:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:22:58,919 INFO L87 Difference]: Start difference. First operand has 76 states, 62 states have (on average 1.564516129032258) internal successors, (97), 63 states have internal predecessors, (97), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:58,958 INFO L93 Difference]: Finished difference Result 152 states and 239 transitions. [2023-02-15 10:22:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:22:58,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-02-15 10:22:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:58,965 INFO L225 Difference]: With dead ends: 152 [2023-02-15 10:22:58,965 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 10:22:58,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:22:58,970 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 33 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:58,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 173 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:22:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 10:22:58,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-02-15 10:22:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 60 states have internal predecessors, (86), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 10:22:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 103 transitions. [2023-02-15 10:22:58,995 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 103 transitions. Word has length 39 [2023-02-15 10:22:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:58,996 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 103 transitions. [2023-02-15 10:22:58,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:22:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 103 transitions. [2023-02-15 10:22:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 10:22:58,997 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:58,998 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:59,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 10:22:59,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 10:22:59,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:22:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:22:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash 237309308, now seen corresponding path program 1 times [2023-02-15 10:22:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:22:59,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721196549] [2023-02-15 10:22:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:22:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:59,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:22:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:59,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:22:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:59,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:22:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:59,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:22:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721196549] [2023-02-15 10:22:59,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721196549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:22:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797813851] [2023-02-15 10:22:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:22:59,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:22:59,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:22:59,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:22:59,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 10:22:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:22:59,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 10:22:59,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:22:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:59,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:22:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:22:59,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797813851] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:22:59,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:22:59,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-15 10:22:59,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348422368] [2023-02-15 10:22:59,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:22:59,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 10:22:59,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:22:59,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 10:22:59,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-15 10:22:59,713 INFO L87 Difference]: Start difference. First operand 72 states and 103 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 10:22:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:22:59,844 INFO L93 Difference]: Finished difference Result 193 states and 282 transitions. [2023-02-15 10:22:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 10:22:59,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-02-15 10:22:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:22:59,846 INFO L225 Difference]: With dead ends: 193 [2023-02-15 10:22:59,846 INFO L226 Difference]: Without dead ends: 148 [2023-02-15 10:22:59,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-02-15 10:22:59,848 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 178 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:22:59,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1213 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:22:59,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-15 10:22:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2023-02-15 10:22:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 93 states have internal predecessors, (130), 14 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2023-02-15 10:22:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2023-02-15 10:22:59,858 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 40 [2023-02-15 10:22:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:22:59,858 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2023-02-15 10:22:59,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 10:22:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2023-02-15 10:22:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 10:22:59,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:22:59,859 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:22:59,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:00,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 10:23:00,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:00,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:00,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1042554370, now seen corresponding path program 1 times [2023-02-15 10:23:00,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:00,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597463912] [2023-02-15 10:23:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:00,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:23:00,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:00,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597463912] [2023-02-15 10:23:00,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597463912] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:00,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:23:00,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 10:23:00,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706170998] [2023-02-15 10:23:00,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:00,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 10:23:00,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:00,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 10:23:00,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:23:00,189 INFO L87 Difference]: Start difference. First operand 111 states and 161 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:00,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:00,265 INFO L93 Difference]: Finished difference Result 208 states and 297 transitions. [2023-02-15 10:23:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:23:00,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-15 10:23:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:00,267 INFO L225 Difference]: With dead ends: 208 [2023-02-15 10:23:00,267 INFO L226 Difference]: Without dead ends: 134 [2023-02-15 10:23:00,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-15 10:23:00,268 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 17 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:00,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 666 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:23:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-15 10:23:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2023-02-15 10:23:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 97 states have (on average 1.402061855670103) internal successors, (136), 99 states have internal predecessors, (136), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2023-02-15 10:23:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2023-02-15 10:23:00,276 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 40 [2023-02-15 10:23:00,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:00,276 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2023-02-15 10:23:00,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2023-02-15 10:23:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 10:23:00,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:00,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:00,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 10:23:00,278 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:00,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:00,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1148734548, now seen corresponding path program 1 times [2023-02-15 10:23:00,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:00,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116050263] [2023-02-15 10:23:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:00,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:23:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 10:23:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 10:23:00,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:00,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116050263] [2023-02-15 10:23:00,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116050263] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:00,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:23:00,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 10:23:00,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128695541] [2023-02-15 10:23:00,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:00,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 10:23:00,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:00,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 10:23:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-15 10:23:00,554 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 10:23:00,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:00,700 INFO L93 Difference]: Finished difference Result 179 states and 256 transitions. [2023-02-15 10:23:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 10:23:00,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2023-02-15 10:23:00,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:00,702 INFO L225 Difference]: With dead ends: 179 [2023-02-15 10:23:00,704 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 10:23:00,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:23:00,706 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 92 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:00,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 1046 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:23:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 10:23:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2023-02-15 10:23:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 125 states have (on average 1.416) internal successors, (177), 128 states have internal predecessors, (177), 20 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (25), 19 states have call predecessors, (25), 19 states have call successors, (25) [2023-02-15 10:23:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 222 transitions. [2023-02-15 10:23:00,731 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 222 transitions. Word has length 44 [2023-02-15 10:23:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:00,732 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 222 transitions. [2023-02-15 10:23:00,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 10:23:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 222 transitions. [2023-02-15 10:23:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 10:23:00,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:00,736 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:00,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 10:23:00,737 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:00,737 INFO L85 PathProgramCache]: Analyzing trace with hash -447669970, now seen corresponding path program 1 times [2023-02-15 10:23:00,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:00,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27145219] [2023-02-15 10:23:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:00,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:23:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 10:23:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:23:00,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:00,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27145219] [2023-02-15 10:23:00,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27145219] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:00,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:23:00,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 10:23:00,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152717445] [2023-02-15 10:23:00,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:00,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 10:23:00,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:00,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 10:23:00,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:23:00,989 INFO L87 Difference]: Start difference. First operand 153 states and 222 transitions. Second operand has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 10:23:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:01,255 INFO L93 Difference]: Finished difference Result 187 states and 266 transitions. [2023-02-15 10:23:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 10:23:01,255 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-02-15 10:23:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:01,256 INFO L225 Difference]: With dead ends: 187 [2023-02-15 10:23:01,256 INFO L226 Difference]: Without dead ends: 179 [2023-02-15 10:23:01,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-02-15 10:23:01,257 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 75 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:01,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1685 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:23:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-15 10:23:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2023-02-15 10:23:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 132 states have (on average 1.4015151515151516) internal successors, (185), 134 states have internal predecessors, (185), 20 states have call successors, (20), 5 states have call predecessors, (20), 8 states have return successors, (28), 21 states have call predecessors, (28), 19 states have call successors, (28) [2023-02-15 10:23:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 233 transitions. [2023-02-15 10:23:01,264 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 233 transitions. Word has length 44 [2023-02-15 10:23:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:01,264 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 233 transitions. [2023-02-15 10:23:01,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 10:23:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 233 transitions. [2023-02-15 10:23:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 10:23:01,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:01,265 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:01,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 10:23:01,265 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1178693971, now seen corresponding path program 1 times [2023-02-15 10:23:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:01,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4377012] [2023-02-15 10:23:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:01,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:01,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:01,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:23:01,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:01,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4377012] [2023-02-15 10:23:01,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4377012] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:01,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:23:01,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 10:23:01,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328344218] [2023-02-15 10:23:01,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:01,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 10:23:01,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 10:23:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:23:01,325 INFO L87 Difference]: Start difference. First operand 161 states and 233 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:01,408 INFO L93 Difference]: Finished difference Result 374 states and 549 transitions. [2023-02-15 10:23:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:23:01,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-02-15 10:23:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:01,410 INFO L225 Difference]: With dead ends: 374 [2023-02-15 10:23:01,410 INFO L226 Difference]: Without dead ends: 275 [2023-02-15 10:23:01,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-15 10:23:01,410 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 115 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:01,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1056 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:23:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-02-15 10:23:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 241. [2023-02-15 10:23:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 201 states have (on average 1.407960199004975) internal successors, (283), 204 states have internal predecessors, (283), 28 states have call successors, (28), 7 states have call predecessors, (28), 11 states have return successors, (40), 29 states have call predecessors, (40), 27 states have call successors, (40) [2023-02-15 10:23:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 351 transitions. [2023-02-15 10:23:01,420 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 351 transitions. Word has length 44 [2023-02-15 10:23:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:01,420 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 351 transitions. [2023-02-15 10:23:01,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 351 transitions. [2023-02-15 10:23:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 10:23:01,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:01,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:01,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 10:23:01,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:01,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1988040597, now seen corresponding path program 1 times [2023-02-15 10:23:01,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:01,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227706138] [2023-02-15 10:23:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:01,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:01,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:01,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:01,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:23:01,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227706138] [2023-02-15 10:23:01,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227706138] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849511081] [2023-02-15 10:23:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:01,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:01,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:01,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:01,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 10:23:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:01,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 10:23:01,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 10:23:01,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:23:01,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849511081] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:01,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:23:01,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 15 [2023-02-15 10:23:01,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42990795] [2023-02-15 10:23:01,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:01,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:23:01,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:01,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:23:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:23:01,763 INFO L87 Difference]: Start difference. First operand 241 states and 351 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:01,785 INFO L93 Difference]: Finished difference Result 375 states and 544 transitions. [2023-02-15 10:23:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:23:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-02-15 10:23:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:01,786 INFO L225 Difference]: With dead ends: 375 [2023-02-15 10:23:01,786 INFO L226 Difference]: Without dead ends: 203 [2023-02-15 10:23:01,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:23:01,787 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 74 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:01,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 162 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:23:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-15 10:23:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 181. [2023-02-15 10:23:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 149 states have (on average 1.3758389261744965) internal successors, (205), 152 states have internal predecessors, (205), 21 states have call successors, (21), 6 states have call predecessors, (21), 10 states have return successors, (33), 22 states have call predecessors, (33), 20 states have call successors, (33) [2023-02-15 10:23:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 259 transitions. [2023-02-15 10:23:01,796 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 259 transitions. Word has length 44 [2023-02-15 10:23:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:01,797 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 259 transitions. [2023-02-15 10:23:01,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 259 transitions. [2023-02-15 10:23:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 10:23:01,797 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:01,798 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:01,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 10:23:02,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:02,003 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:02,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1299374066, now seen corresponding path program 1 times [2023-02-15 10:23:02,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:02,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589570462] [2023-02-15 10:23:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:02,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:23:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 10:23:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 10:23:02,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:02,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589570462] [2023-02-15 10:23:02,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589570462] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:02,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:23:02,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:23:02,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283688053] [2023-02-15 10:23:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:02,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:23:02,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:23:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:23:02,054 INFO L87 Difference]: Start difference. First operand 181 states and 259 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 10:23:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:02,078 INFO L93 Difference]: Finished difference Result 189 states and 266 transitions. [2023-02-15 10:23:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 10:23:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2023-02-15 10:23:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:02,079 INFO L225 Difference]: With dead ends: 189 [2023-02-15 10:23:02,079 INFO L226 Difference]: Without dead ends: 178 [2023-02-15 10:23:02,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:23:02,080 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 7 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:02,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 482 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:23:02,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-15 10:23:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2023-02-15 10:23:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 144 states have (on average 1.375) internal successors, (198), 147 states have internal predecessors, (198), 21 states have call successors, (21), 6 states have call predecessors, (21), 9 states have return successors, (30), 21 states have call predecessors, (30), 20 states have call successors, (30) [2023-02-15 10:23:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 249 transitions. [2023-02-15 10:23:02,087 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 249 transitions. Word has length 46 [2023-02-15 10:23:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:02,087 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 249 transitions. [2023-02-15 10:23:02,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-15 10:23:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 249 transitions. [2023-02-15 10:23:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 10:23:02,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:02,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:02,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 10:23:02,088 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:02,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:02,089 INFO L85 PathProgramCache]: Analyzing trace with hash -662590119, now seen corresponding path program 1 times [2023-02-15 10:23:02,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:02,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437398187] [2023-02-15 10:23:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 10:23:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 10:23:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 10:23:02,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437398187] [2023-02-15 10:23:02,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437398187] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:02,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:23:02,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:23:02,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539725288] [2023-02-15 10:23:02,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:02,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:23:02,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:23:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:23:02,237 INFO L87 Difference]: Start difference. First operand 175 states and 249 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 10:23:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:02,426 INFO L93 Difference]: Finished difference Result 229 states and 323 transitions. [2023-02-15 10:23:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:23:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2023-02-15 10:23:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:02,427 INFO L225 Difference]: With dead ends: 229 [2023-02-15 10:23:02,427 INFO L226 Difference]: Without dead ends: 218 [2023-02-15 10:23:02,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:23:02,428 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, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:02,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 975 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:23:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-15 10:23:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 182. [2023-02-15 10:23:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 148 states have (on average 1.364864864864865) internal successors, (202), 152 states have internal predecessors, (202), 23 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) [2023-02-15 10:23:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 260 transitions. [2023-02-15 10:23:02,438 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 260 transitions. Word has length 48 [2023-02-15 10:23:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:02,439 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 260 transitions. [2023-02-15 10:23:02,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 10:23:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 260 transitions. [2023-02-15 10:23:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 10:23:02,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:02,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:02,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 10:23:02,440 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:02,441 INFO L85 PathProgramCache]: Analyzing trace with hash 38474459, now seen corresponding path program 1 times [2023-02-15 10:23:02,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:02,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077960075] [2023-02-15 10:23:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:02,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 10:23:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 10:23:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:02,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:02,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077960075] [2023-02-15 10:23:02,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077960075] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:02,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841950765] [2023-02-15 10:23:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:02,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:02,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:02,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:02,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 10:23:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:02,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 10:23:02,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 10:23:02,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:03,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841950765] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:03,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:03,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-15 10:23:03,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010159681] [2023-02-15 10:23:03,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:03,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 10:23:03,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:03,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 10:23:03,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-15 10:23:03,259 INFO L87 Difference]: Start difference. First operand 182 states and 260 transitions. Second operand has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 10:23:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:04,551 INFO L93 Difference]: Finished difference Result 352 states and 515 transitions. [2023-02-15 10:23:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 10:23:04,552 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2023-02-15 10:23:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:04,553 INFO L225 Difference]: With dead ends: 352 [2023-02-15 10:23:04,553 INFO L226 Difference]: Without dead ends: 340 [2023-02-15 10:23:04,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 10:23:04,555 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 351 mSDsluCounter, 4041 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:04,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 4239 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 10:23:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-15 10:23:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 221. [2023-02-15 10:23:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 176 states have (on average 1.3238636363636365) internal successors, (233), 184 states have internal predecessors, (233), 28 states have call successors, (28), 7 states have call predecessors, (28), 16 states have return successors, (66), 29 states have call predecessors, (66), 27 states have call successors, (66) [2023-02-15 10:23:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 327 transitions. [2023-02-15 10:23:04,586 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 327 transitions. Word has length 48 [2023-02-15 10:23:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:04,587 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 327 transitions. [2023-02-15 10:23:04,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 10:23:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 327 transitions. [2023-02-15 10:23:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 10:23:04,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:04,588 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:04,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:04,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:04,793 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:04,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1608873757, now seen corresponding path program 2 times [2023-02-15 10:23:04,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:04,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403278050] [2023-02-15 10:23:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:04,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:04,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:04,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:23:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:04,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 10:23:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:04,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 10:23:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:04,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403278050] [2023-02-15 10:23:04,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403278050] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320577440] [2023-02-15 10:23:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:23:04,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:04,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:04,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:05,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 10:23:05,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:23:05,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:23:05,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 10:23:05,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 10:23:05,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:05,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320577440] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:05,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:05,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-15 10:23:05,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245766703] [2023-02-15 10:23:05,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:05,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 10:23:05,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:05,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 10:23:05,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-15 10:23:05,521 INFO L87 Difference]: Start difference. First operand 221 states and 327 transitions. Second operand has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-15 10:23:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:07,131 INFO L93 Difference]: Finished difference Result 393 states and 624 transitions. [2023-02-15 10:23:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 10:23:07,132 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 48 [2023-02-15 10:23:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:07,134 INFO L225 Difference]: With dead ends: 393 [2023-02-15 10:23:07,134 INFO L226 Difference]: Without dead ends: 380 [2023-02-15 10:23:07,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=3183, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 10:23:07,135 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 [2023-02-15 10:23:07,135 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] [2023-02-15 10:23:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-15 10:23:07,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 241. [2023-02-15 10:23:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 187 states have (on average 1.304812834224599) internal successors, (244), 197 states have internal predecessors, (244), 35 states have call successors, (35), 7 states have call predecessors, (35), 18 states have return successors, (105), 36 states have call predecessors, (105), 34 states have call successors, (105) [2023-02-15 10:23:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 384 transitions. [2023-02-15 10:23:07,152 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 384 transitions. Word has length 48 [2023-02-15 10:23:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:07,152 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 384 transitions. [2023-02-15 10:23:07,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-15 10:23:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 384 transitions. [2023-02-15 10:23:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 10:23:07,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:07,153 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:07,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:07,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 10:23:07,358 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:07,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:07,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1889190333, now seen corresponding path program 1 times [2023-02-15 10:23:07,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:07,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423462536] [2023-02-15 10:23:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:07,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:23:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:23:07,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:07,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423462536] [2023-02-15 10:23:07,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423462536] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:07,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643389623] [2023-02-15 10:23:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:07,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:07,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:07,440 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:07,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 10:23:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 10:23:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:23:07,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:23:07,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643389623] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:07,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:23:07,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-02-15 10:23:07,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137287989] [2023-02-15 10:23:07,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:07,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:23:07,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:07,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:23:07,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-02-15 10:23:07,561 INFO L87 Difference]: Start difference. First operand 241 states and 384 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 10:23:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:07,670 INFO L93 Difference]: Finished difference Result 404 states and 615 transitions. [2023-02-15 10:23:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:23:07,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-02-15 10:23:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:07,672 INFO L225 Difference]: With dead ends: 404 [2023-02-15 10:23:07,672 INFO L226 Difference]: Without dead ends: 329 [2023-02-15 10:23:07,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-02-15 10:23:07,673 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 152 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:07,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 973 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:23:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-15 10:23:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 298. [2023-02-15 10:23:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 235 states have (on average 1.3148936170212766) internal successors, (309), 246 states have internal predecessors, (309), 42 states have call successors, (42), 8 states have call predecessors, (42), 20 states have return successors, (96), 43 states have call predecessors, (96), 41 states have call successors, (96) [2023-02-15 10:23:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 447 transitions. [2023-02-15 10:23:07,719 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 447 transitions. Word has length 49 [2023-02-15 10:23:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:07,719 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 447 transitions. [2023-02-15 10:23:07,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 10:23:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 447 transitions. [2023-02-15 10:23:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 10:23:07,720 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:07,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:07,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 10:23:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:07,925 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1079843707, now seen corresponding path program 1 times [2023-02-15 10:23:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:07,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298158038] [2023-02-15 10:23:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:07,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:23:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:23:07,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:07,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298158038] [2023-02-15 10:23:07,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298158038] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:07,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082933819] [2023-02-15 10:23:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:07,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:07,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:07,992 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:08,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 10:23:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 10:23:08,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:23:08,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:23:08,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082933819] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:08,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:08,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-15 10:23:08,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336356944] [2023-02-15 10:23:08,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:08,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 10:23:08,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 10:23:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-15 10:23:08,227 INFO L87 Difference]: Start difference. First operand 298 states and 447 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 10:23:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:08,317 INFO L93 Difference]: Finished difference Result 461 states and 667 transitions. [2023-02-15 10:23:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:23:08,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 49 [2023-02-15 10:23:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:08,319 INFO L225 Difference]: With dead ends: 461 [2023-02-15 10:23:08,320 INFO L226 Difference]: Without dead ends: 309 [2023-02-15 10:23:08,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-02-15 10:23:08,320 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 27 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:08,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1158 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:23:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-02-15 10:23:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 288. [2023-02-15 10:23:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 227 states have (on average 1.2995594713656389) internal successors, (295), 238 states have internal predecessors, (295), 40 states have call successors, (40), 9 states have call predecessors, (40), 20 states have return successors, (90), 40 states have call predecessors, (90), 39 states have call successors, (90) [2023-02-15 10:23:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 425 transitions. [2023-02-15 10:23:08,336 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 425 transitions. Word has length 49 [2023-02-15 10:23:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:08,336 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 425 transitions. [2023-02-15 10:23:08,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 10:23:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 425 transitions. [2023-02-15 10:23:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 10:23:08,337 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:08,337 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:08,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:08,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:08,545 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 698178595, now seen corresponding path program 1 times [2023-02-15 10:23:08,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:08,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288321047] [2023-02-15 10:23:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:08,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:08,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:08,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:08,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:08,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 10:23:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:08,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 10:23:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 10:23:08,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:08,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288321047] [2023-02-15 10:23:08,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288321047] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:08,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145970734] [2023-02-15 10:23:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:08,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:08,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:08,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:08,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 10:23:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:08,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 10:23:08,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 10:23:08,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 10:23:09,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145970734] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:09,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:09,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2023-02-15 10:23:09,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530064276] [2023-02-15 10:23:09,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:09,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 10:23:09,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:09,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 10:23:09,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-02-15 10:23:09,042 INFO L87 Difference]: Start difference. First operand 288 states and 425 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 10:23:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:09,561 INFO L93 Difference]: Finished difference Result 698 states and 1051 transitions. [2023-02-15 10:23:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 10:23:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 50 [2023-02-15 10:23:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:09,564 INFO L225 Difference]: With dead ends: 698 [2023-02-15 10:23:09,564 INFO L226 Difference]: Without dead ends: 402 [2023-02-15 10:23:09,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 10:23:09,565 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 139 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:09,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 2383 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 10:23:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-02-15 10:23:09,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 287. [2023-02-15 10:23:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 227 states have (on average 1.2951541850220265) internal successors, (294), 237 states have internal predecessors, (294), 39 states have call successors, (39), 10 states have call predecessors, (39), 20 states have return successors, (88), 39 states have call predecessors, (88), 38 states have call successors, (88) [2023-02-15 10:23:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 421 transitions. [2023-02-15 10:23:09,582 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 421 transitions. Word has length 50 [2023-02-15 10:23:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:09,582 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 421 transitions. [2023-02-15 10:23:09,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 10:23:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 421 transitions. [2023-02-15 10:23:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 10:23:09,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:09,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:09,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:09,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 10:23:09,804 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1308875237, now seen corresponding path program 2 times [2023-02-15 10:23:09,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:09,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096105854] [2023-02-15 10:23:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:09,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:09,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:09,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:23:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:09,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 10:23:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:09,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 10:23:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 10:23:09,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:09,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096105854] [2023-02-15 10:23:09,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096105854] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:09,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723868400] [2023-02-15 10:23:09,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:23:09,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:09,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:09,893 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:09,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 10:23:09,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:23:09,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:23:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 10:23:09,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 10:23:10,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:10,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723868400] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:10,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:10,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 10] total 21 [2023-02-15 10:23:10,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574019199] [2023-02-15 10:23:10,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:10,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 10:23:10,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:10,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 10:23:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-02-15 10:23:10,213 INFO L87 Difference]: Start difference. First operand 287 states and 421 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-15 10:23:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:10,726 INFO L93 Difference]: Finished difference Result 572 states and 889 transitions. [2023-02-15 10:23:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 10:23:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 50 [2023-02-15 10:23:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:10,728 INFO L225 Difference]: With dead ends: 572 [2023-02-15 10:23:10,728 INFO L226 Difference]: Without dead ends: 553 [2023-02-15 10:23:10,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 10:23:10,730 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 243 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:10,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 2078 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 10:23:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-02-15 10:23:10,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 298. [2023-02-15 10:23:10,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 233 states have (on average 1.2832618025751072) internal successors, (299), 244 states have internal predecessors, (299), 43 states have call successors, (43), 10 states have call predecessors, (43), 21 states have return successors, (112), 43 states have call predecessors, (112), 42 states have call successors, (112) [2023-02-15 10:23:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 454 transitions. [2023-02-15 10:23:10,754 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 454 transitions. Word has length 50 [2023-02-15 10:23:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:10,754 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 454 transitions. [2023-02-15 10:23:10,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-15 10:23:10,755 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 454 transitions. [2023-02-15 10:23:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 10:23:10,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:10,759 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:10,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:10,964 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,SelfDestructingSolverStorable14 [2023-02-15 10:23:10,964 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:10,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2061582742, now seen corresponding path program 1 times [2023-02-15 10:23:10,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:10,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641779124] [2023-02-15 10:23:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:10,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:11,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:11,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:11,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:23:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:23:11,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:11,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641779124] [2023-02-15 10:23:11,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641779124] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:11,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:23:11,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:23:11,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538768074] [2023-02-15 10:23:11,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:11,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:23:11,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:23:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:23:11,045 INFO L87 Difference]: Start difference. First operand 298 states and 454 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:11,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:11,148 INFO L93 Difference]: Finished difference Result 438 states and 659 transitions. [2023-02-15 10:23:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:23:11,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2023-02-15 10:23:11,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:11,150 INFO L225 Difference]: With dead ends: 438 [2023-02-15 10:23:11,150 INFO L226 Difference]: Without dead ends: 320 [2023-02-15 10:23:11,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:23:11,151 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 158 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:11,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1310 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:23:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-15 10:23:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 298. [2023-02-15 10:23:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 233 states have (on average 1.2789699570815452) internal successors, (298), 244 states have internal predecessors, (298), 43 states have call successors, (43), 10 states have call predecessors, (43), 21 states have return successors, (112), 43 states have call predecessors, (112), 42 states have call successors, (112) [2023-02-15 10:23:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 453 transitions. [2023-02-15 10:23:11,169 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 453 transitions. Word has length 49 [2023-02-15 10:23:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:11,169 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 453 transitions. [2023-02-15 10:23:11,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 453 transitions. [2023-02-15 10:23:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 10:23:11,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:11,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:11,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 10:23:11,171 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1646578540, now seen corresponding path program 1 times [2023-02-15 10:23:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:11,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224402865] [2023-02-15 10:23:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:11,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:11,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:11,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:23:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:23:11,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:11,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224402865] [2023-02-15 10:23:11,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224402865] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:11,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768836402] [2023-02-15 10:23:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:11,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:11,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:11,273 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:11,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 10:23:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:11,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 10:23:11,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:23:11,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:23:11,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768836402] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:11,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:11,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 10:23:11,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978505672] [2023-02-15 10:23:11,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:11,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 10:23:11,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:11,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 10:23:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-02-15 10:23:11,431 INFO L87 Difference]: Start difference. First operand 298 states and 453 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 10:23:11,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:11,554 INFO L93 Difference]: Finished difference Result 609 states and 887 transitions. [2023-02-15 10:23:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:23:11,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2023-02-15 10:23:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:11,556 INFO L225 Difference]: With dead ends: 609 [2023-02-15 10:23:11,556 INFO L226 Difference]: Without dead ends: 469 [2023-02-15 10:23:11,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-02-15 10:23:11,558 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 223 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:11,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1575 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:23:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-02-15 10:23:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 419. [2023-02-15 10:23:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 336 states have (on average 1.2886904761904763) internal successors, (433), 352 states have internal predecessors, (433), 53 states have call successors, (53), 13 states have call predecessors, (53), 29 states have return successors, (119), 53 states have call predecessors, (119), 52 states have call successors, (119) [2023-02-15 10:23:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 605 transitions. [2023-02-15 10:23:11,597 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 605 transitions. Word has length 49 [2023-02-15 10:23:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:11,597 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 605 transitions. [2023-02-15 10:23:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 10:23:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 605 transitions. [2023-02-15 10:23:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 10:23:11,598 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:11,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:11,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:11,807 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,SelfDestructingSolverStorable16 [2023-02-15 10:23:11,808 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:11,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash 837231914, now seen corresponding path program 1 times [2023-02-15 10:23:11,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:11,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757464045] [2023-02-15 10:23:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:23:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 10:23:12,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:12,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757464045] [2023-02-15 10:23:12,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757464045] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:12,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:23:12,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 10:23:12,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684484918] [2023-02-15 10:23:12,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:12,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 10:23:12,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:12,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 10:23:12,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:23:12,127 INFO L87 Difference]: Start difference. First operand 419 states and 605 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 10:23:12,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:12,398 INFO L93 Difference]: Finished difference Result 578 states and 831 transitions. [2023-02-15 10:23:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 10:23:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-02-15 10:23:12,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:12,400 INFO L225 Difference]: With dead ends: 578 [2023-02-15 10:23:12,400 INFO L226 Difference]: Without dead ends: 456 [2023-02-15 10:23:12,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-02-15 10:23:12,401 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 135 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:12,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1677 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:23:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-02-15 10:23:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 431. [2023-02-15 10:23:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 347 states have (on average 1.282420749279539) internal successors, (445), 361 states have internal predecessors, (445), 54 states have call successors, (54), 15 states have call predecessors, (54), 29 states have return successors, (113), 54 states have call predecessors, (113), 53 states have call successors, (113) [2023-02-15 10:23:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 612 transitions. [2023-02-15 10:23:12,435 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 612 transitions. Word has length 49 [2023-02-15 10:23:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:12,435 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 612 transitions. [2023-02-15 10:23:12,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 10:23:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 612 transitions. [2023-02-15 10:23:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 10:23:12,436 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:12,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:12,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 10:23:12,437 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:12,437 INFO L85 PathProgramCache]: Analyzing trace with hash 584790902, now seen corresponding path program 1 times [2023-02-15 10:23:12,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:12,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369847003] [2023-02-15 10:23:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:12,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:23:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 10:23:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-15 10:23:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:12,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:12,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369847003] [2023-02-15 10:23:12,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369847003] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:12,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765276375] [2023-02-15 10:23:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:12,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:12,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:12,615 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:12,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 10:23:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:12,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 10:23:12,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:12,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:12,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765276375] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:12,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:12,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 10:23:12,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200905779] [2023-02-15 10:23:12,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:12,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 10:23:12,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 10:23:12,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-15 10:23:12,959 INFO L87 Difference]: Start difference. First operand 431 states and 612 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 10:23:13,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:13,531 INFO L93 Difference]: Finished difference Result 535 states and 785 transitions. [2023-02-15 10:23:13,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 10:23:13,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2023-02-15 10:23:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:13,534 INFO L225 Difference]: With dead ends: 535 [2023-02-15 10:23:13,534 INFO L226 Difference]: Without dead ends: 503 [2023-02-15 10:23:13,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 10:23:13,535 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 276 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:13,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1763 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 10:23:13,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-15 10:23:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 422. [2023-02-15 10:23:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 340 states have (on average 1.2882352941176471) internal successors, (438), 354 states have internal predecessors, (438), 53 states have call successors, (53), 13 states have call predecessors, (53), 28 states have return successors, (110), 54 states have call predecessors, (110), 52 states have call successors, (110) [2023-02-15 10:23:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 601 transitions. [2023-02-15 10:23:13,561 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 601 transitions. Word has length 53 [2023-02-15 10:23:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:13,561 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 601 transitions. [2023-02-15 10:23:13,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 10:23:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 601 transitions. [2023-02-15 10:23:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 10:23:13,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:13,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:13,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 10:23:13,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:13,768 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1202108924, now seen corresponding path program 2 times [2023-02-15 10:23:13,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:13,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266898655] [2023-02-15 10:23:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:13,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:13,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:13,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:13,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:23:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:13,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-15 10:23:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:13,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-15 10:23:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:13,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266898655] [2023-02-15 10:23:13,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266898655] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170525206] [2023-02-15 10:23:13,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:23:13,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:13,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:13,980 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:14,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 10:23:14,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:23:14,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:23:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 10:23:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:14,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 10:23:14,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170525206] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:14,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:14,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 10:23:14,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256299121] [2023-02-15 10:23:14,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:14,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 10:23:14,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 10:23:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-15 10:23:14,323 INFO L87 Difference]: Start difference. First operand 422 states and 601 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 10:23:15,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:15,000 INFO L93 Difference]: Finished difference Result 523 states and 761 transitions. [2023-02-15 10:23:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 10:23:15,001 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2023-02-15 10:23:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:15,003 INFO L225 Difference]: With dead ends: 523 [2023-02-15 10:23:15,003 INFO L226 Difference]: Without dead ends: 503 [2023-02-15 10:23:15,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 10:23:15,005 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 295 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:15,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1662 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 10:23:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-15 10:23:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 368. [2023-02-15 10:23:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 298 states have (on average 1.2852348993288591) internal successors, (383), 310 states have internal predecessors, (383), 43 states have call successors, (43), 13 states have call predecessors, (43), 26 states have return successors, (83), 44 states have call predecessors, (83), 42 states have call successors, (83) [2023-02-15 10:23:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 509 transitions. [2023-02-15 10:23:15,042 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 509 transitions. Word has length 53 [2023-02-15 10:23:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:15,042 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 509 transitions. [2023-02-15 10:23:15,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 10:23:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 509 transitions. [2023-02-15 10:23:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 10:23:15,043 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:15,043 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:15,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:15,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:15,248 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1485657907, now seen corresponding path program 1 times [2023-02-15 10:23:15,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:15,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707450400] [2023-02-15 10:23:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:15,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:15,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:23:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:23:15,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:15,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707450400] [2023-02-15 10:23:15,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707450400] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:15,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278664736] [2023-02-15 10:23:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:15,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:15,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:15,386 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:15,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 10:23:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 10:23:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:23:15,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:23:15,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278664736] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:15,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 10:23:15,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-02-15 10:23:15,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483990027] [2023-02-15 10:23:15,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:15,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:23:15,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:15,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:23:15,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:23:15,471 INFO L87 Difference]: Start difference. First operand 368 states and 509 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:15,502 INFO L93 Difference]: Finished difference Result 534 states and 777 transitions. [2023-02-15 10:23:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:23:15,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-15 10:23:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:15,504 INFO L225 Difference]: With dead ends: 534 [2023-02-15 10:23:15,504 INFO L226 Difference]: Without dead ends: 384 [2023-02-15 10:23:15,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:23:15,505 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 2 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:15,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 293 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:23:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-02-15 10:23:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 376. [2023-02-15 10:23:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 306 states have (on average 1.2777777777777777) internal successors, (391), 318 states have internal predecessors, (391), 43 states have call successors, (43), 13 states have call predecessors, (43), 26 states have return successors, (83), 44 states have call predecessors, (83), 42 states have call successors, (83) [2023-02-15 10:23:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 517 transitions. [2023-02-15 10:23:15,538 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 517 transitions. Word has length 52 [2023-02-15 10:23:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:15,539 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 517 transitions. [2023-02-15 10:23:15,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 517 transitions. [2023-02-15 10:23:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 10:23:15,540 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:15,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:15,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:15,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-15 10:23:15,746 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:15,746 INFO L85 PathProgramCache]: Analyzing trace with hash 676311281, now seen corresponding path program 1 times [2023-02-15 10:23:15,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:15,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319210554] [2023-02-15 10:23:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:15,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:16,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:16,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 10:23:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:23:16,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:16,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319210554] [2023-02-15 10:23:16,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319210554] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875597677] [2023-02-15 10:23:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:16,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:16,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:16,178 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:16,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 10:23:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:16,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 10:23:16,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:23:19,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:23:21,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875597677] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:21,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:21,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 48 [2023-02-15 10:23:21,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762441471] [2023-02-15 10:23:21,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:21,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 10:23:21,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:21,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 10:23:21,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2110, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 10:23:21,020 INFO L87 Difference]: Start difference. First operand 376 states and 517 transitions. Second operand has 48 states, 42 states have (on average 2.119047619047619) internal successors, (89), 37 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 10:23:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:23,349 INFO L93 Difference]: Finished difference Result 602 states and 851 transitions. [2023-02-15 10:23:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-15 10:23:23,349 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 42 states have (on average 2.119047619047619) internal successors, (89), 37 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2023-02-15 10:23:23,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:23,351 INFO L225 Difference]: With dead ends: 602 [2023-02-15 10:23:23,351 INFO L226 Difference]: Without dead ends: 501 [2023-02-15 10:23:23,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=372, Invalid=4884, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 10:23:23,353 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 369 mSDsluCounter, 4362 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 4536 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:23,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 4536 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 10:23:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-02-15 10:23:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 432. [2023-02-15 10:23:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 352 states have (on average 1.2784090909090908) internal successors, (450), 367 states have internal predecessors, (450), 48 states have call successors, (48), 15 states have call predecessors, (48), 31 states have return successors, (97), 49 states have call predecessors, (97), 47 states have call successors, (97) [2023-02-15 10:23:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 595 transitions. [2023-02-15 10:23:23,385 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 595 transitions. Word has length 52 [2023-02-15 10:23:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:23,386 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 595 transitions. [2023-02-15 10:23:23,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 42 states have (on average 2.119047619047619) internal successors, (89), 37 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 10:23:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 595 transitions. [2023-02-15 10:23:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 10:23:23,387 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:23,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:23,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-15 10:23:23,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:23,592 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1341445802, now seen corresponding path program 1 times [2023-02-15 10:23:23,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:23,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278938842] [2023-02-15 10:23:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:23,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:23,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:23,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:23,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:23:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:23,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 10:23:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 10:23:23,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:23,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278938842] [2023-02-15 10:23:23,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278938842] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:23,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:23:23,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:23:23,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965129479] [2023-02-15 10:23:23,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:23,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:23:23,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:23,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:23:23,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:23:23,663 INFO L87 Difference]: Start difference. First operand 432 states and 595 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 10:23:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:23,742 INFO L93 Difference]: Finished difference Result 447 states and 610 transitions. [2023-02-15 10:23:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:23:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-02-15 10:23:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:23,744 INFO L225 Difference]: With dead ends: 447 [2023-02-15 10:23:23,745 INFO L226 Difference]: Without dead ends: 363 [2023-02-15 10:23:23,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:23:23,746 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 8 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:23,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 752 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:23:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-02-15 10:23:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2023-02-15 10:23:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 295 states have (on average 1.2881355932203389) internal successors, (380), 308 states have internal predecessors, (380), 41 states have call successors, (41), 12 states have call predecessors, (41), 26 states have return successors, (83), 42 states have call predecessors, (83), 40 states have call successors, (83) [2023-02-15 10:23:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 504 transitions. [2023-02-15 10:23:23,801 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 504 transitions. Word has length 53 [2023-02-15 10:23:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:23,802 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 504 transitions. [2023-02-15 10:23:23,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 10:23:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 504 transitions. [2023-02-15 10:23:23,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 10:23:23,802 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:23,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:23,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 10:23:23,803 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:23,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1795058933, now seen corresponding path program 1 times [2023-02-15 10:23:23,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:23,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010866487] [2023-02-15 10:23:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:23,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:23,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:23,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:23,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:23:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 10:23:23,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:23,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010866487] [2023-02-15 10:23:23,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010866487] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:23:23,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:23:23,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:23:23,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789864647] [2023-02-15 10:23:23,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:23:23,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:23:23,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:23:23,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:23:23,899 INFO L87 Difference]: Start difference. First operand 363 states and 504 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:23,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:23,955 INFO L93 Difference]: Finished difference Result 526 states and 760 transitions. [2023-02-15 10:23:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:23:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-15 10:23:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:23,957 INFO L225 Difference]: With dead ends: 526 [2023-02-15 10:23:23,957 INFO L226 Difference]: Without dead ends: 383 [2023-02-15 10:23:23,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:23:23,958 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 1 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:23,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 279 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:23:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-15 10:23:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2023-02-15 10:23:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 301 states have (on average 1.282392026578073) internal successors, (386), 314 states have internal predecessors, (386), 41 states have call successors, (41), 12 states have call predecessors, (41), 26 states have return successors, (83), 42 states have call predecessors, (83), 40 states have call successors, (83) [2023-02-15 10:23:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 510 transitions. [2023-02-15 10:23:23,984 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 510 transitions. Word has length 52 [2023-02-15 10:23:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:23,985 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 510 transitions. [2023-02-15 10:23:23,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 10:23:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 510 transitions. [2023-02-15 10:23:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 10:23:23,985 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:23,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:23,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-15 10:23:23,986 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1208252919, now seen corresponding path program 2 times [2023-02-15 10:23:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:23,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59950255] [2023-02-15 10:23:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:23,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:24,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:24,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:24,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:23:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:23:24,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:24,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59950255] [2023-02-15 10:23:24,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59950255] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:24,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258033275] [2023-02-15 10:23:24,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:23:24,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:24,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:24,121 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:24,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 10:23:24,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:23:24,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:23:24,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 10:23:24,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:23:24,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:23:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 10:23:24,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258033275] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:23:24,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:23:24,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 15 [2023-02-15 10:23:24,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725082842] [2023-02-15 10:23:24,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:23:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 10:23:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:23:24,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 10:23:24,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:23:24,420 INFO L87 Difference]: Start difference. First operand 369 states and 510 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 10:23:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:23:24,634 INFO L93 Difference]: Finished difference Result 480 states and 654 transitions. [2023-02-15 10:23:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 10:23:24,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2023-02-15 10:23:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:23:24,636 INFO L225 Difference]: With dead ends: 480 [2023-02-15 10:23:24,636 INFO L226 Difference]: Without dead ends: 374 [2023-02-15 10:23:24,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2023-02-15 10:23:24,637 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 140 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:23:24,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1385 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:23:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-02-15 10:23:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 358. [2023-02-15 10:23:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 290 states have (on average 1.2793103448275862) internal successors, (371), 303 states have internal predecessors, (371), 41 states have call successors, (41), 12 states have call predecessors, (41), 26 states have return successors, (83), 42 states have call predecessors, (83), 40 states have call successors, (83) [2023-02-15 10:23:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 495 transitions. [2023-02-15 10:23:24,699 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 495 transitions. Word has length 52 [2023-02-15 10:23:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:23:24,699 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 495 transitions. [2023-02-15 10:23:24,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 10:23:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 495 transitions. [2023-02-15 10:23:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 10:23:24,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:23:24,700 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:23:24,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 10:23:24,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:24,906 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:23:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:23:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash 187184565, now seen corresponding path program 1 times [2023-02-15 10:23:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:23:24,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810167470] [2023-02-15 10:23:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:24,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:23:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:25,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:23:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:25,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:23:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:25,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:23:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:23:25,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:23:25,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810167470] [2023-02-15 10:23:25,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810167470] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:23:25,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506038456] [2023-02-15 10:23:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:23:25,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:23:25,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:23:25,345 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 10:23:25,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 10:23:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:23:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 10:23:25,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:23:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 10:23:30,131 INFO L328 TraceCheckSpWp]: Computing backward predicates...