./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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_1-3a.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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 22:06:22,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 22:06:22,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 22:06:22,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 22:06:22,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 22:06:22,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 22:06:22,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 22:06:22,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 22:06:22,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 22:06:22,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 22:06:22,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 22:06:22,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 22:06:22,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 22:06:22,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 22:06:22,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 22:06:22,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 22:06:22,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 22:06:22,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 22:06:22,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 22:06:22,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 22:06:22,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 22:06:22,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 22:06:22,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 22:06:22,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 22:06:22,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 22:06:22,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 22:06:22,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 22:06:22,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 22:06:22,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 22:06:22,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 22:06:22,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 22:06:22,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 22:06:22,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 22:06:22,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 22:06:23,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 22:06:23,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 22:06:23,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 22:06:23,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 22:06:23,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 22:06:23,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 22:06:23,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 22:06:23,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 22:06:23,026 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 22:06:23,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 22:06:23,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 22:06:23,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 22:06:23,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 22:06:23,028 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 22:06:23,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 22:06:23,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 22:06:23,029 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 22:06:23,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 22:06:23,030 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 22:06:23,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 22:06:23,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 22:06:23,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 22:06:23,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 22:06:23,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 22:06:23,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 22:06:23,031 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 22:06:23,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 22:06:23,031 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 22:06:23,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 22:06:23,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 22:06:23,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 22:06:23,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 22:06:23,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 22:06:23,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 22:06:23,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 22:06:23,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 22:06:23,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 22:06:23,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 22:06:23,033 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 22:06:23,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 22:06:23,034 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 22:06:23,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 22:06:23,034 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 22:06:23,034 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2023-02-17 22:06:23,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 22:06:23,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 22:06:23,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 22:06:23,281 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 22:06:23,281 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 22:06:23,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-02-17 22:06:24,237 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 22:06:24,429 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 22:06:24,430 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-02-17 22:06:24,435 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06be9b443/60efdfa306c84bdf9e65203c82e90719/FLAG75950b8cd [2023-02-17 22:06:24,448 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06be9b443/60efdfa306c84bdf9e65203c82e90719 [2023-02-17 22:06:24,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 22:06:24,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 22:06:24,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 22:06:24,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 22:06:24,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 22:06:24,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a031259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24, skipping insertion in model container [2023-02-17 22:06:24,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 22:06:24,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 22:06:24,594 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_1-3a.c.cil.c[730,743] [2023-02-17 22:06:24,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 22:06:24,651 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 22:06:24,661 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_1-3a.c.cil.c[730,743] [2023-02-17 22:06:24,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 22:06:24,725 INFO L208 MainTranslator]: Completed translation [2023-02-17 22:06:24,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24 WrapperNode [2023-02-17 22:06:24,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 22:06:24,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 22:06:24,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 22:06:24,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 22:06:24,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,768 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 201 [2023-02-17 22:06:24,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 22:06:24,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 22:06:24,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 22:06:24,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 22:06:24,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 22:06:24,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 22:06:24,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 22:06:24,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 22:06:24,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (1/1) ... [2023-02-17 22:06:24,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 22:06:24,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:24,834 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) [2023-02-17 22:06:24,839 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 [2023-02-17 22:06:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 22:06:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 22:06:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-17 22:06:24,861 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-17 22:06:24,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 22:06:24,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 22:06:24,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 22:06:24,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 22:06:24,940 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 22:06:24,957 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 22:06:25,186 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 22:06:25,190 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 22:06:25,191 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 22:06:25,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:06:25 BoogieIcfgContainer [2023-02-17 22:06:25,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 22:06:25,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 22:06:25,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 22:06:25,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 22:06:25,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 10:06:24" (1/3) ... [2023-02-17 22:06:25,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fd336a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 10:06:25, skipping insertion in model container [2023-02-17 22:06:25,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:06:24" (2/3) ... [2023-02-17 22:06:25,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fd336a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 10:06:25, skipping insertion in model container [2023-02-17 22:06:25,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:06:25" (3/3) ... [2023-02-17 22:06:25,203 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2023-02-17 22:06:25,214 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 22:06:25,214 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 22:06:25,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 22:06:25,247 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;@71de21c6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 22:06:25,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 22:06:25,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 84 states have internal predecessors, (132), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 22:06:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 22:06:25,256 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:25,257 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] [2023-02-17 22:06:25,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:25,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash 906811198, now seen corresponding path program 1 times [2023-02-17 22:06:25,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:25,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032376113] [2023-02-17 22:06:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:25,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:25,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032376113] [2023-02-17 22:06:25,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032376113] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:25,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:25,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 22:06:25,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692103834] [2023-02-17 22:06:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:25,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:06:25,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:06:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:06:25,495 INFO L87 Difference]: Start difference. First operand has 94 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 84 states have internal predecessors, (132), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:25,531 INFO L93 Difference]: Finished difference Result 235 states and 390 transitions. [2023-02-17 22:06:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:06:25,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2023-02-17 22:06:25,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:25,539 INFO L225 Difference]: With dead ends: 235 [2023-02-17 22:06:25,539 INFO L226 Difference]: Without dead ends: 136 [2023-02-17 22:06:25,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:06:25,543 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 63 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:25,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-17 22:06:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2023-02-17 22:06:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 111 states have (on average 1.5405405405405406) internal successors, (171), 113 states have internal predecessors, (171), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-17 22:06:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 194 transitions. [2023-02-17 22:06:25,574 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 194 transitions. Word has length 37 [2023-02-17 22:06:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:25,575 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 194 transitions. [2023-02-17 22:06:25,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 194 transitions. [2023-02-17 22:06:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 22:06:25,577 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:25,577 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] [2023-02-17 22:06:25,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 22:06:25,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash 804838827, now seen corresponding path program 1 times [2023-02-17 22:06:25,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:25,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671969010] [2023-02-17 22:06:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:25,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:25,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:25,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671969010] [2023-02-17 22:06:25,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671969010] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:25,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:25,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 22:06:25,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554103819] [2023-02-17 22:06:25,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:06:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:25,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:06:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:06:25,645 INFO L87 Difference]: Start difference. First operand 126 states and 194 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:25,662 INFO L93 Difference]: Finished difference Result 228 states and 353 transitions. [2023-02-17 22:06:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:06:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-02-17 22:06:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:25,664 INFO L225 Difference]: With dead ends: 228 [2023-02-17 22:06:25,664 INFO L226 Difference]: Without dead ends: 192 [2023-02-17 22:06:25,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:06:25,666 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 55 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:25,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 272 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-17 22:06:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2023-02-17 22:06:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 162 states have (on average 1.5185185185185186) internal successors, (246), 165 states have internal predecessors, (246), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-17 22:06:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 280 transitions. [2023-02-17 22:06:25,681 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 280 transitions. Word has length 39 [2023-02-17 22:06:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:25,681 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 280 transitions. [2023-02-17 22:06:25,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 280 transitions. [2023-02-17 22:06:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 22:06:25,683 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:25,683 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] [2023-02-17 22:06:25,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 22:06:25,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1821406099, now seen corresponding path program 1 times [2023-02-17 22:06:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:25,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014371346] [2023-02-17 22:06:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:25,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:25,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:25,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014371346] [2023-02-17 22:06:25,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014371346] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:25,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195690428] [2023-02-17 22:06:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:25,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:25,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:25,975 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) [2023-02-17 22:06:26,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 22:06:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 22:06:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 22:06:26,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:06:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:26,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195690428] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:26,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 22:06:26,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 12 [2023-02-17 22:06:26,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171988646] [2023-02-17 22:06:26,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:26,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:06:26,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:26,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:06:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:06:26,152 INFO L87 Difference]: Start difference. First operand 183 states and 280 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:26,181 INFO L93 Difference]: Finished difference Result 319 states and 484 transitions. [2023-02-17 22:06:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:06:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-17 22:06:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:26,189 INFO L225 Difference]: With dead ends: 319 [2023-02-17 22:06:26,189 INFO L226 Difference]: Without dead ends: 215 [2023-02-17 22:06:26,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:06:26,191 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 64 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 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 [2023-02-17 22:06:26,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:26,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-17 22:06:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 183. [2023-02-17 22:06:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 162 states have (on average 1.4938271604938271) internal successors, (242), 165 states have internal predecessors, (242), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-17 22:06:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 276 transitions. [2023-02-17 22:06:26,210 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 276 transitions. Word has length 40 [2023-02-17 22:06:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:26,210 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 276 transitions. [2023-02-17 22:06:26,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 276 transitions. [2023-02-17 22:06:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 22:06:26,216 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:26,216 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] [2023-02-17 22:06:26,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 22:06:26,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:26,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:26,422 INFO L85 PathProgramCache]: Analyzing trace with hash -363711082, now seen corresponding path program 1 times [2023-02-17 22:06:26,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:26,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909270972] [2023-02-17 22:06:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:26,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:26,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:26,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909270972] [2023-02-17 22:06:26,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909270972] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:26,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:26,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:06:26,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438616358] [2023-02-17 22:06:26,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:26,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:06:26,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:26,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:06:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:06:26,475 INFO L87 Difference]: Start difference. First operand 183 states and 276 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:26,512 INFO L93 Difference]: Finished difference Result 291 states and 442 transitions. [2023-02-17 22:06:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:06:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-17 22:06:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:26,513 INFO L225 Difference]: With dead ends: 291 [2023-02-17 22:06:26,514 INFO L226 Difference]: Without dead ends: 262 [2023-02-17 22:06:26,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:06:26,519 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 147 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:26,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 477 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-02-17 22:06:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 228. [2023-02-17 22:06:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 202 states have (on average 1.5) internal successors, (303), 206 states have internal predecessors, (303), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-17 22:06:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 347 transitions. [2023-02-17 22:06:26,542 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 347 transitions. Word has length 40 [2023-02-17 22:06:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:26,543 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 347 transitions. [2023-02-17 22:06:26,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 347 transitions. [2023-02-17 22:06:26,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 22:06:26,543 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:26,543 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] [2023-02-17 22:06:26,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 22:06:26,544 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:26,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:26,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1384779436, now seen corresponding path program 1 times [2023-02-17 22:06:26,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:26,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847539648] [2023-02-17 22:06:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:26,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:26,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:26,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847539648] [2023-02-17 22:06:26,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847539648] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:26,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:26,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 22:06:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095706137] [2023-02-17 22:06:26,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:26,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:06:26,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:06:26,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:06:26,579 INFO L87 Difference]: Start difference. First operand 228 states and 347 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:26,589 INFO L93 Difference]: Finished difference Result 241 states and 363 transitions. [2023-02-17 22:06:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:06:26,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-17 22:06:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:26,591 INFO L225 Difference]: With dead ends: 241 [2023-02-17 22:06:26,591 INFO L226 Difference]: Without dead ends: 234 [2023-02-17 22:06:26,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 22:06:26,592 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:26,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 268 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-17 22:06:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2023-02-17 22:06:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 203 states have (on average 1.4975369458128078) internal successors, (304), 207 states have internal predecessors, (304), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-17 22:06:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2023-02-17 22:06:26,610 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 40 [2023-02-17 22:06:26,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:26,611 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2023-02-17 22:06:26,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2023-02-17 22:06:26,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 22:06:26,613 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:26,613 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:26,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 22:06:26,613 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:26,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1398619051, now seen corresponding path program 1 times [2023-02-17 22:06:26,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:26,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39202343] [2023-02-17 22:06:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:26,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:26,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:26,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39202343] [2023-02-17 22:06:26,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39202343] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:26,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906829320] [2023-02-17 22:06:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:26,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:26,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:26,707 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) [2023-02-17 22:06:26,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 22:06:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:26,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 22:06:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:26,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:06:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:26,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906829320] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:06:26,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:06:26,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-02-17 22:06:26,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559810192] [2023-02-17 22:06:26,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:06:26,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 22:06:26,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:26,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 22:06:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-02-17 22:06:26,889 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-17 22:06:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:27,076 INFO L93 Difference]: Finished difference Result 762 states and 1158 transitions. [2023-02-17 22:06:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 22:06:27,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2023-02-17 22:06:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:27,079 INFO L225 Difference]: With dead ends: 762 [2023-02-17 22:06:27,079 INFO L226 Difference]: Without dead ends: 576 [2023-02-17 22:06:27,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-02-17 22:06:27,081 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 576 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:27,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 1513 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:06:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-02-17 22:06:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 359. [2023-02-17 22:06:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 320 states have (on average 1.465625) internal successors, (469), 325 states have internal predecessors, (469), 35 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (37), 34 states have call predecessors, (37), 33 states have call successors, (37) [2023-02-17 22:06:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 541 transitions. [2023-02-17 22:06:27,092 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 541 transitions. Word has length 41 [2023-02-17 22:06:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:27,092 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 541 transitions. [2023-02-17 22:06:27,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-17 22:06:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 541 transitions. [2023-02-17 22:06:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 22:06:27,093 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:27,093 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:27,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 22:06:27,297 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,SelfDestructingSolverStorable5 [2023-02-17 22:06:27,297 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:27,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1616484567, now seen corresponding path program 1 times [2023-02-17 22:06:27,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:27,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403473056] [2023-02-17 22:06:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:27,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:27,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:27,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403473056] [2023-02-17 22:06:27,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403473056] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:27,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:27,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 22:06:27,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768435752] [2023-02-17 22:06:27,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:27,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 22:06:27,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:27,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 22:06:27,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 22:06:27,390 INFO L87 Difference]: Start difference. First operand 359 states and 541 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:27,460 INFO L93 Difference]: Finished difference Result 779 states and 1170 transitions. [2023-02-17 22:06:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 22:06:27,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2023-02-17 22:06:27,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:27,462 INFO L225 Difference]: With dead ends: 779 [2023-02-17 22:06:27,462 INFO L226 Difference]: Without dead ends: 473 [2023-02-17 22:06:27,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-17 22:06:27,463 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 75 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:27,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 735 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:06:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-02-17 22:06:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2023-02-17 22:06:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 424 states have (on average 1.4103773584905661) internal successors, (598), 430 states have internal predecessors, (598), 41 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (43), 42 states have call predecessors, (43), 39 states have call successors, (43) [2023-02-17 22:06:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 682 transitions. [2023-02-17 22:06:27,475 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 682 transitions. Word has length 41 [2023-02-17 22:06:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:27,475 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 682 transitions. [2023-02-17 22:06:27,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 682 transitions. [2023-02-17 22:06:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 22:06:27,497 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:27,497 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:27,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 22:06:27,497 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:27,498 INFO L85 PathProgramCache]: Analyzing trace with hash 337909198, now seen corresponding path program 1 times [2023-02-17 22:06:27,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:27,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350090381] [2023-02-17 22:06:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:27,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:27,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:27,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350090381] [2023-02-17 22:06:27,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350090381] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:27,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:27,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 22:06:27,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706504255] [2023-02-17 22:06:27,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:27,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 22:06:27,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:27,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 22:06:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:06:27,544 INFO L87 Difference]: Start difference. First operand 469 states and 682 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:27,566 INFO L93 Difference]: Finished difference Result 476 states and 688 transitions. [2023-02-17 22:06:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 22:06:27,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2023-02-17 22:06:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:27,569 INFO L225 Difference]: With dead ends: 476 [2023-02-17 22:06:27,569 INFO L226 Difference]: Without dead ends: 469 [2023-02-17 22:06:27,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 22:06:27,570 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 5 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:27,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 528 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-02-17 22:06:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2023-02-17 22:06:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 422 states have (on average 1.40521327014218) internal successors, (593), 428 states have internal predecessors, (593), 41 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (43), 42 states have call predecessors, (43), 39 states have call successors, (43) [2023-02-17 22:06:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 677 transitions. [2023-02-17 22:06:27,585 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 677 transitions. Word has length 42 [2023-02-17 22:06:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:27,586 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 677 transitions. [2023-02-17 22:06:27,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 677 transitions. [2023-02-17 22:06:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 22:06:27,587 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:27,587 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:27,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 22:06:27,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1951760518, now seen corresponding path program 1 times [2023-02-17 22:06:27,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:27,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628221046] [2023-02-17 22:06:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:27,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:27,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:27,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628221046] [2023-02-17 22:06:27,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628221046] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:27,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:27,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:06:27,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355031512] [2023-02-17 22:06:27,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:27,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:06:27,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:27,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:06:27,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:06:27,627 INFO L87 Difference]: Start difference. First operand 467 states and 677 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:27,652 INFO L93 Difference]: Finished difference Result 517 states and 742 transitions. [2023-02-17 22:06:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:06:27,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-02-17 22:06:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:27,655 INFO L225 Difference]: With dead ends: 517 [2023-02-17 22:06:27,655 INFO L226 Difference]: Without dead ends: 443 [2023-02-17 22:06:27,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:06:27,657 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 115 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:27,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 435 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-02-17 22:06:27,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 347. [2023-02-17 22:06:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 316 states have (on average 1.370253164556962) internal successors, (433), 318 states have internal predecessors, (433), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (29), 28 states have call predecessors, (29), 25 states have call successors, (29) [2023-02-17 22:06:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 489 transitions. [2023-02-17 22:06:27,671 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 489 transitions. Word has length 43 [2023-02-17 22:06:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:27,671 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 489 transitions. [2023-02-17 22:06:27,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 489 transitions. [2023-02-17 22:06:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 22:06:27,673 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:27,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:27,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 22:06:27,674 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:27,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:27,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1645353096, now seen corresponding path program 1 times [2023-02-17 22:06:27,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:27,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682219503] [2023-02-17 22:06:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:27,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:27,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:27,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682219503] [2023-02-17 22:06:27,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682219503] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:27,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:27,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 22:06:27,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631092329] [2023-02-17 22:06:27,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:27,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 22:06:27,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:27,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 22:06:27,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 22:06:27,749 INFO L87 Difference]: Start difference. First operand 347 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:27,861 INFO L93 Difference]: Finished difference Result 876 states and 1271 transitions. [2023-02-17 22:06:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 22:06:27,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-17 22:06:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:27,864 INFO L225 Difference]: With dead ends: 876 [2023-02-17 22:06:27,864 INFO L226 Difference]: Without dead ends: 728 [2023-02-17 22:06:27,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-17 22:06:27,865 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 179 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:27,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1116 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:06:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-02-17 22:06:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 442. [2023-02-17 22:06:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 410 states have (on average 1.3780487804878048) internal successors, (565), 411 states have internal predecessors, (565), 27 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (33), 30 states have call predecessors, (33), 25 states have call successors, (33) [2023-02-17 22:06:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 625 transitions. [2023-02-17 22:06:27,883 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 625 transitions. Word has length 45 [2023-02-17 22:06:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:27,883 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 625 transitions. [2023-02-17 22:06:27,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 625 transitions. [2023-02-17 22:06:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 22:06:27,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:27,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:27,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 22:06:27,885 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash 836006470, now seen corresponding path program 1 times [2023-02-17 22:06:27,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:27,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303223908] [2023-02-17 22:06:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:27,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:27,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:27,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303223908] [2023-02-17 22:06:27,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303223908] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:27,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205158796] [2023-02-17 22:06:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:27,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:27,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:27,956 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) [2023-02-17 22:06:27,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 22:06:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:27,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 22:06:28,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 22:06:28,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:06:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:28,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205158796] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:28,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 22:06:28,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 12 [2023-02-17 22:06:28,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733117855] [2023-02-17 22:06:28,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:28,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:06:28,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:28,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:06:28,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:06:28,055 INFO L87 Difference]: Start difference. First operand 442 states and 625 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:28,087 INFO L93 Difference]: Finished difference Result 646 states and 902 transitions. [2023-02-17 22:06:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:06:28,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-17 22:06:28,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:28,088 INFO L225 Difference]: With dead ends: 646 [2023-02-17 22:06:28,088 INFO L226 Difference]: Without dead ends: 414 [2023-02-17 22:06:28,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:06:28,089 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 98 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:28,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 318 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:28,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-02-17 22:06:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 352. [2023-02-17 22:06:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 326 states have (on average 1.3466257668711656) internal successors, (439), 328 states have internal predecessors, (439), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (27), 23 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-17 22:06:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 487 transitions. [2023-02-17 22:06:28,101 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 487 transitions. Word has length 45 [2023-02-17 22:06:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:28,102 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 487 transitions. [2023-02-17 22:06:28,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 487 transitions. [2023-02-17 22:06:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 22:06:28,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:28,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:28,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 22:06:28,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:28,309 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:28,309 INFO L85 PathProgramCache]: Analyzing trace with hash 980602509, now seen corresponding path program 1 times [2023-02-17 22:06:28,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:28,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175858220] [2023-02-17 22:06:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:28,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:06:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:28,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175858220] [2023-02-17 22:06:28,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175858220] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:28,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:28,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:06:28,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77322808] [2023-02-17 22:06:28,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:28,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:06:28,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:28,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:06:28,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:06:28,353 INFO L87 Difference]: Start difference. First operand 352 states and 487 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:28,380 INFO L93 Difference]: Finished difference Result 580 states and 799 transitions. [2023-02-17 22:06:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 22:06:28,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-17 22:06:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:28,382 INFO L225 Difference]: With dead ends: 580 [2023-02-17 22:06:28,382 INFO L226 Difference]: Without dead ends: 540 [2023-02-17 22:06:28,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:06:28,383 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 124 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:28,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 456 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-02-17 22:06:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 390. [2023-02-17 22:06:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 363 states have (on average 1.3471074380165289) internal successors, (489), 364 states have internal predecessors, (489), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2023-02-17 22:06:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 539 transitions. [2023-02-17 22:06:28,397 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 539 transitions. Word has length 45 [2023-02-17 22:06:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:28,397 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 539 transitions. [2023-02-17 22:06:28,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 539 transitions. [2023-02-17 22:06:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 22:06:28,397 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:28,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:28,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 22:06:28,398 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash 828308281, now seen corresponding path program 1 times [2023-02-17 22:06:28,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:28,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836741152] [2023-02-17 22:06:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:28,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:28,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:28,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836741152] [2023-02-17 22:06:28,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836741152] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:28,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:28,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:06:28,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385860862] [2023-02-17 22:06:28,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:28,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:06:28,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:06:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:06:28,422 INFO L87 Difference]: Start difference. First operand 390 states and 539 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:28,437 INFO L93 Difference]: Finished difference Result 406 states and 556 transitions. [2023-02-17 22:06:28,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:06:28,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2023-02-17 22:06:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:28,439 INFO L225 Difference]: With dead ends: 406 [2023-02-17 22:06:28,439 INFO L226 Difference]: Without dead ends: 390 [2023-02-17 22:06:28,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:06:28,440 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 1 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 393 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 [2023-02-17 22:06:28,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 393 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-02-17 22:06:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2023-02-17 22:06:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 363 states have (on average 1.3415977961432506) internal successors, (487), 364 states have internal predecessors, (487), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2023-02-17 22:06:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 537 transitions. [2023-02-17 22:06:28,474 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 537 transitions. Word has length 46 [2023-02-17 22:06:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:28,474 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 537 transitions. [2023-02-17 22:06:28,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 537 transitions. [2023-02-17 22:06:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 22:06:28,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:28,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:28,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-17 22:06:28,475 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 127243703, now seen corresponding path program 1 times [2023-02-17 22:06:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:28,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673859580] [2023-02-17 22:06:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:28,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:28,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:28,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673859580] [2023-02-17 22:06:28,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673859580] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:28,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79246893] [2023-02-17 22:06:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:28,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:28,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:28,618 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) [2023-02-17 22:06:28,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 22:06:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:28,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 22:06:28,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 22:06:28,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:06:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:28,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79246893] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:06:28,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:06:28,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-02-17 22:06:28,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306618416] [2023-02-17 22:06:28,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:06:28,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 22:06:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:28,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 22:06:28,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-02-17 22:06:28,764 INFO L87 Difference]: Start difference. First operand 390 states and 537 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-17 22:06:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:29,212 INFO L93 Difference]: Finished difference Result 726 states and 1003 transitions. [2023-02-17 22:06:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 22:06:29,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2023-02-17 22:06:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:29,214 INFO L225 Difference]: With dead ends: 726 [2023-02-17 22:06:29,214 INFO L226 Difference]: Without dead ends: 339 [2023-02-17 22:06:29,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-02-17 22:06:29,215 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 320 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:29,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 2042 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 22:06:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-02-17 22:06:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 266. [2023-02-17 22:06:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 244 states have (on average 1.3278688524590163) internal successors, (324), 244 states have internal predecessors, (324), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (24), 19 states have call predecessors, (24), 15 states have call successors, (24) [2023-02-17 22:06:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 364 transitions. [2023-02-17 22:06:29,227 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 364 transitions. Word has length 46 [2023-02-17 22:06:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:29,227 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 364 transitions. [2023-02-17 22:06:29,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-17 22:06:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 364 transitions. [2023-02-17 22:06:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 22:06:29,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:29,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:29,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 22:06:29,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:29,432 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:29,432 INFO L85 PathProgramCache]: Analyzing trace with hash 705038931, now seen corresponding path program 1 times [2023-02-17 22:06:29,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:29,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030299942] [2023-02-17 22:06:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:29,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:29,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:29,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:29,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:29,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:29,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030299942] [2023-02-17 22:06:29,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030299942] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:29,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030420710] [2023-02-17 22:06:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:29,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:29,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:29,552 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) [2023-02-17 22:06:29,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 22:06:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:29,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 22:06:29,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:29,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 22:06:29,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030420710] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:29,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 22:06:29,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-02-17 22:06:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698905651] [2023-02-17 22:06:29,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:29,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 22:06:29,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:29,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 22:06:29,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-17 22:06:29,628 INFO L87 Difference]: Start difference. First operand 266 states and 364 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:29,754 INFO L93 Difference]: Finished difference Result 428 states and 595 transitions. [2023-02-17 22:06:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 22:06:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-02-17 22:06:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:29,757 INFO L225 Difference]: With dead ends: 428 [2023-02-17 22:06:29,757 INFO L226 Difference]: Without dead ends: 355 [2023-02-17 22:06:29,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-17 22:06:29,758 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 132 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:29,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 716 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:06:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-17 22:06:29,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 296. [2023-02-17 22:06:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 266 states have (on average 1.3421052631578947) internal successors, (357), 269 states have internal predecessors, (357), 24 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (27), 24 states have call predecessors, (27), 22 states have call successors, (27) [2023-02-17 22:06:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 408 transitions. [2023-02-17 22:06:29,771 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 408 transitions. Word has length 48 [2023-02-17 22:06:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:29,771 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 408 transitions. [2023-02-17 22:06:29,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 408 transitions. [2023-02-17 22:06:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 22:06:29,772 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:29,772 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] [2023-02-17 22:06:29,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 22:06:29,977 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,SelfDestructingSolverStorable14 [2023-02-17 22:06:29,977 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:29,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1641997822, now seen corresponding path program 1 times [2023-02-17 22:06:29,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:29,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026127020] [2023-02-17 22:06:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:29,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:30,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:30,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:30,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:06:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 22:06:30,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:30,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026127020] [2023-02-17 22:06:30,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026127020] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:30,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822501382] [2023-02-17 22:06:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:30,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:30,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:30,041 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) [2023-02-17 22:06:30,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 22:06:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:30,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 22:06:30,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 22:06:30,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 22:06:30,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822501382] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:30,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 22:06:30,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 15 [2023-02-17 22:06:30,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036330492] [2023-02-17 22:06:30,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:30,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 22:06:30,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:30,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 22:06:30,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-17 22:06:30,182 INFO L87 Difference]: Start difference. First operand 296 states and 408 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 22:06:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:30,494 INFO L93 Difference]: Finished difference Result 826 states and 1149 transitions. [2023-02-17 22:06:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 22:06:30,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-02-17 22:06:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:30,497 INFO L225 Difference]: With dead ends: 826 [2023-02-17 22:06:30,497 INFO L226 Difference]: Without dead ends: 582 [2023-02-17 22:06:30,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-02-17 22:06:30,498 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 516 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:30,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1107 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 22:06:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-02-17 22:06:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 532. [2023-02-17 22:06:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 480 states have (on average 1.3020833333333333) internal successors, (625), 484 states have internal predecessors, (625), 46 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (49), 47 states have call predecessors, (49), 43 states have call successors, (49) [2023-02-17 22:06:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 720 transitions. [2023-02-17 22:06:30,517 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 720 transitions. Word has length 49 [2023-02-17 22:06:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:30,517 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 720 transitions. [2023-02-17 22:06:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 22:06:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 720 transitions. [2023-02-17 22:06:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 22:06:30,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:30,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:30,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 22:06:30,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-17 22:06:30,725 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:30,725 INFO L85 PathProgramCache]: Analyzing trace with hash 164141512, now seen corresponding path program 1 times [2023-02-17 22:06:30,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:30,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162218758] [2023-02-17 22:06:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:30,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:30,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:30,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:30,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 22:06:30,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:30,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162218758] [2023-02-17 22:06:30,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162218758] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:30,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085155948] [2023-02-17 22:06:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:30,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:30,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:30,988 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) [2023-02-17 22:06:30,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 22:06:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:31,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 22:06:31,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:06:31,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 22:06:31,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085155948] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:31,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 22:06:31,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 24 [2023-02-17 22:06:31,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092924451] [2023-02-17 22:06:31,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:31,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 22:06:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 22:06:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2023-02-17 22:06:31,152 INFO L87 Difference]: Start difference. First operand 532 states and 720 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:31,406 INFO L93 Difference]: Finished difference Result 963 states and 1327 transitions. [2023-02-17 22:06:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 22:06:31,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-02-17 22:06:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:31,409 INFO L225 Difference]: With dead ends: 963 [2023-02-17 22:06:31,409 INFO L226 Difference]: Without dead ends: 841 [2023-02-17 22:06:31,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2023-02-17 22:06:31,410 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 357 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:31,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1423 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 22:06:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2023-02-17 22:06:31,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 712. [2023-02-17 22:06:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 640 states have (on average 1.296875) internal successors, (830), 645 states have internal predecessors, (830), 66 states have call successors, (66), 3 states have call predecessors, (66), 5 states have return successors, (69), 68 states have call predecessors, (69), 63 states have call successors, (69) [2023-02-17 22:06:31,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 965 transitions. [2023-02-17 22:06:31,436 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 965 transitions. Word has length 50 [2023-02-17 22:06:31,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:31,436 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 965 transitions. [2023-02-17 22:06:31,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:31,436 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 965 transitions. [2023-02-17 22:06:31,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 22:06:31,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:31,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:31,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 22:06:31,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:31,643 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:31,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1732806460, now seen corresponding path program 1 times [2023-02-17 22:06:31,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:31,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510713325] [2023-02-17 22:06:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:31,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:31,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:31,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:31,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:31,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:31,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510713325] [2023-02-17 22:06:31,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510713325] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:31,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:31,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:06:31,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045834747] [2023-02-17 22:06:31,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:31,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:06:31,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:31,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:06:31,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:06:31,677 INFO L87 Difference]: Start difference. First operand 712 states and 965 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:31,702 INFO L93 Difference]: Finished difference Result 721 states and 973 transitions. [2023-02-17 22:06:31,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:06:31,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-17 22:06:31,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:31,704 INFO L225 Difference]: With dead ends: 721 [2023-02-17 22:06:31,704 INFO L226 Difference]: Without dead ends: 686 [2023-02-17 22:06:31,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:06:31,705 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 384 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 [2023-02-17 22:06:31,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 384 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-02-17 22:06:31,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 662. [2023-02-17 22:06:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 596 states have (on average 1.2986577181208054) internal successors, (774), 601 states have internal predecessors, (774), 60 states have call successors, (60), 3 states have call predecessors, (60), 5 states have return successors, (62), 61 states have call predecessors, (62), 57 states have call successors, (62) [2023-02-17 22:06:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 896 transitions. [2023-02-17 22:06:31,727 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 896 transitions. Word has length 52 [2023-02-17 22:06:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:31,727 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 896 transitions. [2023-02-17 22:06:31,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 896 transitions. [2023-02-17 22:06:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 22:06:31,728 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:31,728 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:31,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-17 22:06:31,728 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1348659453, now seen corresponding path program 1 times [2023-02-17 22:06:31,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:31,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479306842] [2023-02-17 22:06:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:31,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:31,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:31,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:31,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:31,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479306842] [2023-02-17 22:06:31,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479306842] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:31,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:31,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 22:06:31,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449603347] [2023-02-17 22:06:31,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:31,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 22:06:31,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:31,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 22:06:31,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:06:31,826 INFO L87 Difference]: Start difference. First operand 662 states and 896 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:32,103 INFO L93 Difference]: Finished difference Result 882 states and 1199 transitions. [2023-02-17 22:06:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 22:06:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2023-02-17 22:06:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:32,106 INFO L225 Difference]: With dead ends: 882 [2023-02-17 22:06:32,106 INFO L226 Difference]: Without dead ends: 864 [2023-02-17 22:06:32,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:06:32,107 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 265 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:32,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 797 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 22:06:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2023-02-17 22:06:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 698. [2023-02-17 22:06:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 628 states have (on average 1.2961783439490446) internal successors, (814), 634 states have internal predecessors, (814), 64 states have call successors, (64), 3 states have call predecessors, (64), 5 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2023-02-17 22:06:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 944 transitions. [2023-02-17 22:06:32,144 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 944 transitions. Word has length 53 [2023-02-17 22:06:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:32,144 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 944 transitions. [2023-02-17 22:06:32,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 944 transitions. [2023-02-17 22:06:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 22:06:32,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:32,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:32,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-17 22:06:32,146 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:32,146 INFO L85 PathProgramCache]: Analyzing trace with hash -38305071, now seen corresponding path program 1 times [2023-02-17 22:06:32,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:32,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719876201] [2023-02-17 22:06:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:32,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:06:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 22:06:32,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:32,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719876201] [2023-02-17 22:06:32,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719876201] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:32,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:32,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 22:06:32,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056678167] [2023-02-17 22:06:32,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:32,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 22:06:32,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 22:06:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 22:06:32,193 INFO L87 Difference]: Start difference. First operand 698 states and 944 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:32,241 INFO L93 Difference]: Finished difference Result 753 states and 1013 transitions. [2023-02-17 22:06:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 22:06:32,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2023-02-17 22:06:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:32,244 INFO L225 Difference]: With dead ends: 753 [2023-02-17 22:06:32,244 INFO L226 Difference]: Without dead ends: 751 [2023-02-17 22:06:32,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:06:32,245 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 41 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:32,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 669 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-02-17 22:06:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 710. [2023-02-17 22:06:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 635 states have (on average 1.2929133858267716) internal successors, (821), 645 states have internal predecessors, (821), 68 states have call successors, (68), 4 states have call predecessors, (68), 6 states have return successors, (70), 65 states have call predecessors, (70), 65 states have call successors, (70) [2023-02-17 22:06:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 959 transitions. [2023-02-17 22:06:32,277 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 959 transitions. Word has length 54 [2023-02-17 22:06:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:32,277 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 959 transitions. [2023-02-17 22:06:32,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 959 transitions. [2023-02-17 22:06:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 22:06:32,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:32,278 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:32,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-17 22:06:32,279 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:32,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash 18953231, now seen corresponding path program 1 times [2023-02-17 22:06:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:32,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822193252] [2023-02-17 22:06:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:32,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:06:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 22:06:32,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822193252] [2023-02-17 22:06:32,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822193252] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:32,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:32,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 22:06:32,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043561901] [2023-02-17 22:06:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:32,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 22:06:32,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 22:06:32,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 22:06:32,323 INFO L87 Difference]: Start difference. First operand 710 states and 959 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:32,386 INFO L93 Difference]: Finished difference Result 775 states and 1043 transitions. [2023-02-17 22:06:32,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 22:06:32,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2023-02-17 22:06:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:32,388 INFO L225 Difference]: With dead ends: 775 [2023-02-17 22:06:32,388 INFO L226 Difference]: Without dead ends: 773 [2023-02-17 22:06:32,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:06:32,389 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 39 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:32,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 697 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-02-17 22:06:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 718. [2023-02-17 22:06:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 638 states have (on average 1.29153605015674) internal successors, (824), 652 states have internal predecessors, (824), 72 states have call successors, (72), 5 states have call predecessors, (72), 7 states have return successors, (74), 65 states have call predecessors, (74), 69 states have call successors, (74) [2023-02-17 22:06:32,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 970 transitions. [2023-02-17 22:06:32,420 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 970 transitions. Word has length 54 [2023-02-17 22:06:32,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:32,420 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 970 transitions. [2023-02-17 22:06:32,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:32,420 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 970 transitions. [2023-02-17 22:06:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 22:06:32,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:32,421 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, 1] [2023-02-17 22:06:32,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-17 22:06:32,422 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:32,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash -931744545, now seen corresponding path program 1 times [2023-02-17 22:06:32,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:32,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169006165] [2023-02-17 22:06:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:06:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 22:06:32,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:32,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169006165] [2023-02-17 22:06:32,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169006165] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:32,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:06:32,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-17 22:06:32,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678383174] [2023-02-17 22:06:32,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:32,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 22:06:32,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:32,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 22:06:32,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-02-17 22:06:32,591 INFO L87 Difference]: Start difference. First operand 718 states and 970 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 22:06:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:32,960 INFO L93 Difference]: Finished difference Result 755 states and 1013 transitions. [2023-02-17 22:06:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 22:06:32,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2023-02-17 22:06:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:32,964 INFO L225 Difference]: With dead ends: 755 [2023-02-17 22:06:32,964 INFO L226 Difference]: Without dead ends: 753 [2023-02-17 22:06:32,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-17 22:06:32,965 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 261 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:32,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 2120 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 22:06:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-02-17 22:06:32,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 727. [2023-02-17 22:06:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 645 states have (on average 1.289922480620155) internal successors, (832), 660 states have internal predecessors, (832), 73 states have call successors, (73), 6 states have call predecessors, (73), 8 states have return successors, (75), 65 states have call predecessors, (75), 70 states have call successors, (75) [2023-02-17 22:06:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 980 transitions. [2023-02-17 22:06:32,998 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 980 transitions. Word has length 54 [2023-02-17 22:06:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:32,998 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 980 transitions. [2023-02-17 22:06:32,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 22:06:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 980 transitions. [2023-02-17 22:06:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 22:06:32,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:32,999 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:33,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-17 22:06:33,000 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:33,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1315627843, now seen corresponding path program 1 times [2023-02-17 22:06:33,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:33,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383336145] [2023-02-17 22:06:33,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:33,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:33,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:33,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:33,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:06:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 22:06:33,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:33,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383336145] [2023-02-17 22:06:33,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383336145] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:33,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545139373] [2023-02-17 22:06:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:33,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:33,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:33,205 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) [2023-02-17 22:06:33,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 22:06:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:33,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 22:06:33,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:06:33,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 22:06:33,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545139373] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:33,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 22:06:33,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 23 [2023-02-17 22:06:33,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517575775] [2023-02-17 22:06:33,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:33,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 22:06:33,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 22:06:33,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2023-02-17 22:06:33,302 INFO L87 Difference]: Start difference. First operand 727 states and 980 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:33,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:33,473 INFO L93 Difference]: Finished difference Result 922 states and 1252 transitions. [2023-02-17 22:06:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 22:06:33,474 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-02-17 22:06:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:33,476 INFO L225 Difference]: With dead ends: 922 [2023-02-17 22:06:33,476 INFO L226 Difference]: Without dead ends: 859 [2023-02-17 22:06:33,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2023-02-17 22:06:33,477 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 213 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:33,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 830 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:06:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2023-02-17 22:06:33,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 644. [2023-02-17 22:06:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 572 states have (on average 1.2902097902097902) internal successors, (738), 586 states have internal predecessors, (738), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2023-02-17 22:06:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 866 transitions. [2023-02-17 22:06:33,508 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 866 transitions. Word has length 55 [2023-02-17 22:06:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:33,508 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 866 transitions. [2023-02-17 22:06:33,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 866 transitions. [2023-02-17 22:06:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 22:06:33,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:33,509 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:33,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 22:06:33,713 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,SelfDestructingSolverStorable22 [2023-02-17 22:06:33,714 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:33,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash 997951512, now seen corresponding path program 1 times [2023-02-17 22:06:33,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:33,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522910143] [2023-02-17 22:06:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:33,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:33,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:33,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:33,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:06:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 22:06:33,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:33,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522910143] [2023-02-17 22:06:33,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522910143] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:33,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892292029] [2023-02-17 22:06:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:33,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:33,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:33,970 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) [2023-02-17 22:06:33,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 22:06:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:34,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 22:06:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 22:06:34,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 22:06:34,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892292029] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:34,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 22:06:34,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 20 [2023-02-17 22:06:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037617107] [2023-02-17 22:06:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:34,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 22:06:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 22:06:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-02-17 22:06:34,072 INFO L87 Difference]: Start difference. First operand 644 states and 866 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:34,204 INFO L93 Difference]: Finished difference Result 785 states and 1038 transitions. [2023-02-17 22:06:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 22:06:34,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-02-17 22:06:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:34,206 INFO L225 Difference]: With dead ends: 785 [2023-02-17 22:06:34,206 INFO L226 Difference]: Without dead ends: 751 [2023-02-17 22:06:34,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2023-02-17 22:06:34,207 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 314 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:06:34,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 412 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:06:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-02-17 22:06:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 644. [2023-02-17 22:06:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 572 states have (on average 1.2867132867132867) internal successors, (736), 586 states have internal predecessors, (736), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2023-02-17 22:06:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 864 transitions. [2023-02-17 22:06:34,248 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 864 transitions. Word has length 55 [2023-02-17 22:06:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:34,248 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 864 transitions. [2023-02-17 22:06:34,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 864 transitions. [2023-02-17 22:06:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 22:06:34,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:34,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:34,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 22:06:34,453 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,SelfDestructingSolverStorable23 [2023-02-17 22:06:34,454 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:34,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1506046358, now seen corresponding path program 1 times [2023-02-17 22:06:34,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:34,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921178702] [2023-02-17 22:06:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:34,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:34,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:34,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:06:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 22:06:34,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921178702] [2023-02-17 22:06:34,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921178702] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024503777] [2023-02-17 22:06:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:34,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:34,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:34,539 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) [2023-02-17 22:06:34,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 22:06:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:34,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 22:06:34,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 22:06:34,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 22:06:34,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024503777] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:06:34,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 22:06:34,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-17 22:06:34,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068491423] [2023-02-17 22:06:34,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:06:34,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:06:34,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:06:34,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:06:34,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-17 22:06:34,596 INFO L87 Difference]: Start difference. First operand 644 states and 864 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:06:34,636 INFO L93 Difference]: Finished difference Result 958 states and 1299 transitions. [2023-02-17 22:06:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:06:34,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2023-02-17 22:06:34,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:06:34,638 INFO L225 Difference]: With dead ends: 958 [2023-02-17 22:06:34,638 INFO L226 Difference]: Without dead ends: 684 [2023-02-17 22:06:34,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-17 22:06:34,639 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 371 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 [2023-02-17 22:06:34,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 371 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:06:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2023-02-17 22:06:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 664. [2023-02-17 22:06:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 592 states have (on average 1.277027027027027) internal successors, (756), 606 states have internal predecessors, (756), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2023-02-17 22:06:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 884 transitions. [2023-02-17 22:06:34,671 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 884 transitions. Word has length 57 [2023-02-17 22:06:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:06:34,671 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 884 transitions. [2023-02-17 22:06:34,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:06:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 884 transitions. [2023-02-17 22:06:34,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 22:06:34,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:06:34,672 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:06:34,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 22:06:34,877 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,SelfDestructingSolverStorable24 [2023-02-17 22:06:34,877 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:06:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:06:34,877 INFO L85 PathProgramCache]: Analyzing trace with hash 696699732, now seen corresponding path program 1 times [2023-02-17 22:06:34,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:06:34,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508967471] [2023-02-17 22:06:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:34,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:06:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:35,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:06:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:35,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:06:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:35,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:06:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 22:06:35,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:06:35,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508967471] [2023-02-17 22:06:35,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508967471] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:06:35,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426188257] [2023-02-17 22:06:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:06:35,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:06:35,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:06:35,208 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) [2023-02-17 22:06:35,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 22:06:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:06:35,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 22:06:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:06:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 22:06:38,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:07:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 22:07:01,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426188257] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:07:01,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:07:01,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 43 [2023-02-17 22:07:01,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665951541] [2023-02-17 22:07:01,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:07:01,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-17 22:07:01,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:01,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-17 22:07:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1680, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 22:07:01,255 INFO L87 Difference]: Start difference. First operand 664 states and 884 transitions. Second operand has 43 states, 40 states have (on average 2.675) internal successors, (107), 35 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-17 22:07:10,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-17 22:07:12,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-17 22:07:18,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-17 22:07:20,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-17 22:07:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:21,542 INFO L93 Difference]: Finished difference Result 1226 states and 1649 transitions. [2023-02-17 22:07:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-17 22:07:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.675) internal successors, (107), 35 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2023-02-17 22:07:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:21,546 INFO L225 Difference]: With dead ends: 1226 [2023-02-17 22:07:21,546 INFO L226 Difference]: Without dead ends: 1062 [2023-02-17 22:07:21,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=375, Invalid=3915, Unknown=0, NotChecked=0, Total=4290 [2023-02-17 22:07:21,548 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 1008 mSDsluCounter, 4703 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 133 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 4900 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:21,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 4900 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2504 Invalid, 4 Unknown, 0 Unchecked, 17.9s Time] [2023-02-17 22:07:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2023-02-17 22:07:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 740. [2023-02-17 22:07:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 662 states have (on average 1.2673716012084593) internal successors, (839), 679 states have internal predecessors, (839), 68 states have call successors, (68), 7 states have call predecessors, (68), 9 states have return successors, (73), 57 states have call predecessors, (73), 65 states have call successors, (73) [2023-02-17 22:07:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 980 transitions. [2023-02-17 22:07:21,591 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 980 transitions. Word has length 57 [2023-02-17 22:07:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:21,592 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 980 transitions. [2023-02-17 22:07:21,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.675) internal successors, (107), 35 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-17 22:07:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 980 transitions. [2023-02-17 22:07:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 22:07:21,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:21,593 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:21,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 22:07:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-17 22:07:21,809 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1129526808, now seen corresponding path program 1 times [2023-02-17 22:07:21,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:21,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007918347] [2023-02-17 22:07:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:21,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:22,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:22,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:22,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:07:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 22:07:22,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007918347] [2023-02-17 22:07:22,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007918347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911729797] [2023-02-17 22:07:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:22,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:22,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:22,190 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) [2023-02-17 22:07:22,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 22:07:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:22,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 22:07:22,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:13:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 22:13:18,145 INFO L328 TraceCheckSpWp]: Computing backward predicates...