./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_4-2a.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_4-2a.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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 22:07:43,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 22:07:43,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 22:07:44,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 22:07:44,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 22:07:44,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 22:07:44,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 22:07:44,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 22:07:44,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 22:07:44,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 22:07:44,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 22:07:44,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 22:07:44,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 22:07:44,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 22:07:44,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 22:07:44,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 22:07:44,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 22:07:44,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 22:07:44,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 22:07:44,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 22:07:44,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 22:07:44,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 22:07:44,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 22:07:44,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 22:07:44,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 22:07:44,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 22:07:44,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 22:07:44,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 22:07:44,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 22:07:44,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 22:07:44,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 22:07:44,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 22:07:44,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 22:07:44,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 22:07:44,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 22:07:44,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 22:07:44,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 22:07:44,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 22:07:44,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 22:07:44,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 22:07:44,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 22:07:44,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 22:07:44,109 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 22:07:44,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 22:07:44,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 22:07:44,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 22:07:44,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 22:07:44,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 22:07:44,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 22:07:44,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 22:07:44,112 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 22:07:44,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 22:07:44,113 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 22:07:44,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 22:07:44,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 22:07:44,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 22:07:44,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 22:07:44,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 22:07:44,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 22:07:44,115 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 22:07:44,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 22:07:44,115 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 22:07:44,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 22:07:44,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 22:07:44,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 22:07:44,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 22:07:44,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 22:07:44,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 22:07:44,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 22:07:44,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 22:07:44,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 22:07:44,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 22:07:44,117 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 22:07:44,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 22:07:44,118 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 22:07:44,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 22:07:44,118 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 22:07:44,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2023-02-17 22:07:44,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 22:07:44,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 22:07:44,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 22:07:44,353 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 22:07:44,353 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 22:07:44,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-02-17 22:07:45,467 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 22:07:45,665 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 22:07:45,665 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-02-17 22:07:45,672 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f336ecb0/1ee5938461c14b4f848c12f32fa2f3d1/FLAG861fa8742 [2023-02-17 22:07:45,685 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f336ecb0/1ee5938461c14b4f848c12f32fa2f3d1 [2023-02-17 22:07:45,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 22:07:45,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 22:07:45,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 22:07:45,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 22:07:45,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 22:07:45,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:45,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b79f426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45, skipping insertion in model container [2023-02-17 22:07:45,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:45,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 22:07:45,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 22:07:45,841 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-02-17 22:07:45,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 22:07:45,891 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 22:07:45,901 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-02-17 22:07:45,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 22:07:45,933 INFO L208 MainTranslator]: Completed translation [2023-02-17 22:07:45,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45 WrapperNode [2023-02-17 22:07:45,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 22:07:45,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 22:07:45,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 22:07:45,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 22:07:45,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:45,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:45,960 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-02-17 22:07:45,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 22:07:45,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 22:07:45,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 22:07:45,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 22:07:45,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:45,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:45,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:45,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:45,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:46,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:46,001 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:46,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:46,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 22:07:46,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 22:07:46,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 22:07:46,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 22:07:46,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (1/1) ... [2023-02-17 22:07:46,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 22:07:46,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:46,042 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 22:07:46,062 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 22:07:46,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 22:07:46,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 22:07:46,079 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-17 22:07:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-17 22:07:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 22:07:46,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 22:07:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-02-17 22:07:46,081 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-02-17 22:07:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 22:07:46,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 22:07:46,184 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 22:07:46,187 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 22:07:46,551 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 22:07:46,561 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 22:07:46,564 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 22:07:46,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:07:46 BoogieIcfgContainer [2023-02-17 22:07:46,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 22:07:46,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 22:07:46,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 22:07:46,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 22:07:46,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 10:07:45" (1/3) ... [2023-02-17 22:07:46,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@296814aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 10:07:46, skipping insertion in model container [2023-02-17 22:07:46,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:07:45" (2/3) ... [2023-02-17 22:07:46,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@296814aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 10:07:46, skipping insertion in model container [2023-02-17 22:07:46,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:07:46" (3/3) ... [2023-02-17 22:07:46,578 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2023-02-17 22:07:46,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 22:07:46,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 22:07:46,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 22:07:46,663 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;@2449ed13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 22:07:46,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 22:07:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 64 states have internal predecessors, (99), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 22:07:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 22:07:46,678 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:46,678 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 22:07:46,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:46,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:46,683 INFO L85 PathProgramCache]: Analyzing trace with hash -64573039, now seen corresponding path program 1 times [2023-02-17 22:07:46,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:46,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221421326] [2023-02-17 22:07:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:46,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:47,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:47,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:47,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:47,325 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 22:07:47,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:47,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221421326] [2023-02-17 22:07:47,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221421326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:47,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492088258] [2023-02-17 22:07:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:47,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:47,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:47,331 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 22:07:47,357 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 22:07:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:47,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 22:07:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:07:47,512 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 22:07:47,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:07:47,544 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 22:07:47,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492088258] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:47,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 22:07:47,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 5] total 13 [2023-02-17 22:07:47,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034608578] [2023-02-17 22:07:47,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:07:47,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 22:07:47,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:47,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 22:07:47,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-17 22:07:47,595 INFO L87 Difference]: Start difference. First operand has 76 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 64 states have internal predecessors, (99), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:07:47,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:47,648 INFO L93 Difference]: Finished difference Result 152 states and 238 transitions. [2023-02-17 22:07:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 22:07:47,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-02-17 22:07:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:47,665 INFO L225 Difference]: With dead ends: 152 [2023-02-17 22:07:47,666 INFO L226 Difference]: Without dead ends: 75 [2023-02-17 22:07:47,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-17 22:07:47,675 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 34 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 171 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 22:07:47,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 171 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:07:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-17 22:07:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-02-17 22:07:47,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.45) internal successors, (87), 61 states have internal predecessors, (87), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 22:07:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 102 transitions. [2023-02-17 22:07:47,715 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 102 transitions. Word has length 39 [2023-02-17 22:07:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:47,715 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 102 transitions. [2023-02-17 22:07:47,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:07:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 102 transitions. [2023-02-17 22:07:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 22:07:47,718 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:47,718 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 22:07:47,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 22:07:47,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-17 22:07:47,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:47,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1601352673, now seen corresponding path program 1 times [2023-02-17 22:07:47,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:47,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680884928] [2023-02-17 22:07:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:48,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:48,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:48,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:48,094 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 22:07:48,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:48,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680884928] [2023-02-17 22:07:48,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680884928] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:48,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811316251] [2023-02-17 22:07:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:48,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:48,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:48,102 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 22:07:48,105 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 22:07:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:48,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 22:07:48,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:07:48,274 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 22:07:48,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:07:48,380 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 22:07:48,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811316251] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:07:48,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:07:48,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-17 22:07:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032754673] [2023-02-17 22:07:48,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:07:48,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 22:07:48,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 22:07:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-17 22:07:48,386 INFO L87 Difference]: Start difference. First operand 72 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-17 22:07:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:48,619 INFO L93 Difference]: Finished difference Result 193 states and 278 transitions. [2023-02-17 22:07:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 22:07:48,620 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-02-17 22:07:48,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:48,626 INFO L225 Difference]: With dead ends: 193 [2023-02-17 22:07:48,626 INFO L226 Difference]: Without dead ends: 148 [2023-02-17 22:07:48,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-02-17 22:07:48,630 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 244 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:48,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1499 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:07:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-17 22:07:48,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2023-02-17 22:07:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 95 states have internal predecessors, (132), 12 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-17 22:07:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2023-02-17 22:07:48,650 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 40 [2023-02-17 22:07:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:48,650 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2023-02-17 22:07:48,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-17 22:07:48,650 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2023-02-17 22:07:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 22:07:48,654 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:48,654 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 22:07:48,664 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 22:07:48,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-17 22:07:48,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:48,865 INFO L85 PathProgramCache]: Analyzing trace with hash 321488995, now seen corresponding path program 1 times [2023-02-17 22:07:48,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:48,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628020072] [2023-02-17 22:07:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:48,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:48,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:48,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:48,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:48,967 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 22:07:48,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:48,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628020072] [2023-02-17 22:07:48,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628020072] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:07:48,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:07:48,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 22:07:48,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514645920] [2023-02-17 22:07:48,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:07:48,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 22:07:48,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:48,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 22:07:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:07:48,971 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:07:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:49,036 INFO L93 Difference]: Finished difference Result 208 states and 293 transitions. [2023-02-17 22:07:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 22:07:49,037 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-17 22:07:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:49,039 INFO L225 Difference]: With dead ends: 208 [2023-02-17 22:07:49,039 INFO L226 Difference]: Without dead ends: 134 [2023-02-17 22:07:49,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 22:07:49,042 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 17 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:49,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 659 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:07:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-17 22:07:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2023-02-17 22:07:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.393939393939394) internal successors, (138), 101 states have internal predecessors, (138), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2023-02-17 22:07:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 167 transitions. [2023-02-17 22:07:49,070 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 167 transitions. Word has length 40 [2023-02-17 22:07:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:49,071 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 167 transitions. [2023-02-17 22:07:49,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:07:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 167 transitions. [2023-02-17 22:07:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 22:07:49,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:49,076 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 22:07:49,077 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash 145642080, now seen corresponding path program 1 times [2023-02-17 22:07:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:49,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38034844] [2023-02-17 22:07:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:07:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 22:07:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 22:07:49,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:49,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38034844] [2023-02-17 22:07:49,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38034844] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:07:49,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:07:49,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 22:07:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709182779] [2023-02-17 22:07:49,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:07:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 22:07:49,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:49,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 22:07:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-17 22:07:49,338 INFO L87 Difference]: Start difference. First operand 119 states and 167 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 22:07:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:49,497 INFO L93 Difference]: Finished difference Result 179 states and 253 transitions. [2023-02-17 22:07:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 22:07:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2023-02-17 22:07:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:49,501 INFO L225 Difference]: With dead ends: 179 [2023-02-17 22:07:49,502 INFO L226 Difference]: Without dead ends: 168 [2023-02-17 22:07:49,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-17 22:07:49,503 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 100 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:49,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 913 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:07:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-17 22:07:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2023-02-17 22:07:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 128 states have (on average 1.40625) internal successors, (180), 131 states have internal predecessors, (180), 17 states have call successors, (17), 5 states have call predecessors, (17), 7 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2023-02-17 22:07:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 219 transitions. [2023-02-17 22:07:49,516 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 219 transitions. Word has length 44 [2023-02-17 22:07:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:49,516 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 219 transitions. [2023-02-17 22:07:49,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 22:07:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 219 transitions. [2023-02-17 22:07:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 22:07:49,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:49,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:49,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 22:07:49,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:49,519 INFO L85 PathProgramCache]: Analyzing trace with hash 846706658, now seen corresponding path program 1 times [2023-02-17 22:07:49,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:49,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387945016] [2023-02-17 22:07:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:49,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:07:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 22:07:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 22:07:49,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:49,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387945016] [2023-02-17 22:07:49,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387945016] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:07:49,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:07:49,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-17 22:07:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790494268] [2023-02-17 22:07:49,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:07:49,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 22:07:49,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 22:07:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-17 22:07:49,781 INFO L87 Difference]: Start difference. First operand 153 states and 219 transitions. Second operand has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 22:07:50,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:50,026 INFO L93 Difference]: Finished difference Result 187 states and 263 transitions. [2023-02-17 22:07:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 22:07:50,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-02-17 22:07:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:50,028 INFO L225 Difference]: With dead ends: 187 [2023-02-17 22:07:50,029 INFO L226 Difference]: Without dead ends: 179 [2023-02-17 22:07:50,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-02-17 22:07:50,030 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 76 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:50,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1686 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 22:07:50,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-17 22:07:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2023-02-17 22:07:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 135 states have (on average 1.3925925925925926) internal successors, (188), 137 states have internal predecessors, (188), 17 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (25), 18 states have call predecessors, (25), 16 states have call successors, (25) [2023-02-17 22:07:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2023-02-17 22:07:50,042 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 44 [2023-02-17 22:07:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:50,043 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2023-02-17 22:07:50,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 22:07:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2023-02-17 22:07:50,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 22:07:50,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:50,044 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:50,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 22:07:50,044 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:50,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1839755374, now seen corresponding path program 1 times [2023-02-17 22:07:50,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:50,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491009168] [2023-02-17 22:07:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:50,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,112 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 22:07:50,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:50,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491009168] [2023-02-17 22:07:50,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491009168] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:07:50,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:07:50,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 22:07:50,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981891484] [2023-02-17 22:07:50,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:07:50,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 22:07:50,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 22:07:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:07:50,115 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:07:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:50,202 INFO L93 Difference]: Finished difference Result 374 states and 540 transitions. [2023-02-17 22:07:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 22:07:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-02-17 22:07:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:50,204 INFO L225 Difference]: With dead ends: 374 [2023-02-17 22:07:50,204 INFO L226 Difference]: Without dead ends: 275 [2023-02-17 22:07:50,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 22:07:50,206 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 118 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:50,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1037 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:07:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-02-17 22:07:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 241. [2023-02-17 22:07:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 206 states have (on average 1.3980582524271845) internal successors, (288), 209 states have internal predecessors, (288), 23 states have call successors, (23), 7 states have call predecessors, (23), 11 states have return successors, (35), 24 states have call predecessors, (35), 22 states have call successors, (35) [2023-02-17 22:07:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 346 transitions. [2023-02-17 22:07:50,226 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 346 transitions. Word has length 44 [2023-02-17 22:07:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:50,227 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 346 transitions. [2023-02-17 22:07:50,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:07:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 346 transitions. [2023-02-17 22:07:50,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 22:07:50,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:50,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:50,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 22:07:50,229 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:50,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1645865296, now seen corresponding path program 1 times [2023-02-17 22:07:50,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:50,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985604813] [2023-02-17 22:07:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:50,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,343 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 22:07:50,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:50,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985604813] [2023-02-17 22:07:50,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985604813] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:50,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429267041] [2023-02-17 22:07:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:50,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:50,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:50,345 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 22:07:50,368 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 22:07:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 22:07:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:07:50,477 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 22:07:50,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:07:50,511 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 22:07:50,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429267041] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:50,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 22:07:50,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 15 [2023-02-17 22:07:50,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854421838] [2023-02-17 22:07:50,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:07:50,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:07:50,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:07:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-17 22:07:50,513 INFO L87 Difference]: Start difference. First operand 241 states and 346 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:07:50,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:50,537 INFO L93 Difference]: Finished difference Result 375 states and 536 transitions. [2023-02-17 22:07:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:07:50,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-02-17 22:07:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:50,539 INFO L225 Difference]: With dead ends: 375 [2023-02-17 22:07:50,539 INFO L226 Difference]: Without dead ends: 203 [2023-02-17 22:07:50,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-17 22:07:50,540 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 76 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:50,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 160 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:07:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-17 22:07:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 181. [2023-02-17 22:07:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 152 states have (on average 1.368421052631579) internal successors, (208), 155 states have internal predecessors, (208), 18 states have call successors, (18), 6 states have call predecessors, (18), 10 states have return successors, (30), 19 states have call predecessors, (30), 17 states have call successors, (30) [2023-02-17 22:07:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 256 transitions. [2023-02-17 22:07:50,551 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 256 transitions. Word has length 44 [2023-02-17 22:07:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:50,551 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 256 transitions. [2023-02-17 22:07:50,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:07:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 256 transitions. [2023-02-17 22:07:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 22:07:50,553 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:50,553 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:50,563 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 22:07:50,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:50,759 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:50,760 INFO L85 PathProgramCache]: Analyzing trace with hash -492965466, now seen corresponding path program 1 times [2023-02-17 22:07:50,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:50,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631221717] [2023-02-17 22:07:50,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:50,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:07:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 22:07:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 22:07:50,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631221717] [2023-02-17 22:07:50,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631221717] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:07:50,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:07:50,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 22:07:50,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136595937] [2023-02-17 22:07:50,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:07:50,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 22:07:50,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:50,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 22:07:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 22:07:50,836 INFO L87 Difference]: Start difference. First operand 181 states and 256 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 22:07:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:50,862 INFO L93 Difference]: Finished difference Result 189 states and 263 transitions. [2023-02-17 22:07:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 22:07:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2023-02-17 22:07:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:50,864 INFO L225 Difference]: With dead ends: 189 [2023-02-17 22:07:50,864 INFO L226 Difference]: Without dead ends: 178 [2023-02-17 22:07:50,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:07:50,865 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 7 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:50,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 478 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:07:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-17 22:07:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2023-02-17 22:07:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 147 states have (on average 1.3673469387755102) internal successors, (201), 150 states have internal predecessors, (201), 18 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (27), 18 states have call predecessors, (27), 17 states have call successors, (27) [2023-02-17 22:07:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 246 transitions. [2023-02-17 22:07:50,875 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 246 transitions. Word has length 46 [2023-02-17 22:07:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:50,875 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 246 transitions. [2023-02-17 22:07:50,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 22:07:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 246 transitions. [2023-02-17 22:07:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 22:07:50,876 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:50,877 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:50,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 22:07:50,877 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:50,878 INFO L85 PathProgramCache]: Analyzing trace with hash 180512397, now seen corresponding path program 1 times [2023-02-17 22:07:50,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:50,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264136013] [2023-02-17 22:07:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:50,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 22:07:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-17 22:07:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 22:07:50,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264136013] [2023-02-17 22:07:50,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264136013] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:07:50,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:07:50,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 22:07:50,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952533095] [2023-02-17 22:07:50,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:07:50,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 22:07:50,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:50,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 22:07:50,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-17 22:07:50,997 INFO L87 Difference]: Start difference. First operand 175 states and 246 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 22:07:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:51,153 INFO L93 Difference]: Finished difference Result 229 states and 319 transitions. [2023-02-17 22:07:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 22:07:51,154 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2023-02-17 22:07:51,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:51,155 INFO L225 Difference]: With dead ends: 229 [2023-02-17 22:07:51,155 INFO L226 Difference]: Without dead ends: 218 [2023-02-17 22:07:51,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-17 22:07:51,156 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 88 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:51,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 963 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:07:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-17 22:07:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 182. [2023-02-17 22:07:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 151 states have (on average 1.3576158940397351) internal successors, (205), 155 states have internal predecessors, (205), 20 states have call successors, (20), 6 states have call predecessors, (20), 10 states have return successors, (32), 20 states have call predecessors, (32), 19 states have call successors, (32) [2023-02-17 22:07:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 257 transitions. [2023-02-17 22:07:51,168 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 257 transitions. Word has length 48 [2023-02-17 22:07:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:51,169 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 257 transitions. [2023-02-17 22:07:51,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 22:07:51,169 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 257 transitions. [2023-02-17 22:07:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 22:07:51,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:51,170 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:51,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 22:07:51,171 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash 881576975, now seen corresponding path program 1 times [2023-02-17 22:07:51,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935908769] [2023-02-17 22:07:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:51,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:51,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:51,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:51,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:51,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 22:07:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:51,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-17 22:07:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:07:51,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:51,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935908769] [2023-02-17 22:07:51,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935908769] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:51,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560107275] [2023-02-17 22:07:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:51,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:51,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:51,357 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 22:07:51,371 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 22:07:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:51,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 22:07:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:07:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 22:07:51,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:07:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:07:51,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560107275] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:07:51,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:07:51,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-17 22:07:51,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122825369] [2023-02-17 22:07:51,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:07:51,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 22:07:51,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:51,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 22:07:51,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-17 22:07:51,884 INFO L87 Difference]: Start difference. First operand 182 states and 257 transitions. Second operand has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-17 22:07:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:53,501 INFO L93 Difference]: Finished difference Result 352 states and 509 transitions. [2023-02-17 22:07:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-17 22:07:53,503 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2023-02-17 22:07:53,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:53,505 INFO L225 Difference]: With dead ends: 352 [2023-02-17 22:07:53,505 INFO L226 Difference]: Without dead ends: 340 [2023-02-17 22:07:53,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2023-02-17 22:07:53,507 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 364 mSDsluCounter, 3241 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 3434 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:53,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 3434 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 22:07:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-17 22:07:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 221. [2023-02-17 22:07:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 180 states have (on average 1.3166666666666667) internal successors, (237), 188 states have internal predecessors, (237), 24 states have call successors, (24), 7 states have call predecessors, (24), 16 states have return successors, (62), 25 states have call predecessors, (62), 23 states have call successors, (62) [2023-02-17 22:07:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 323 transitions. [2023-02-17 22:07:53,529 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 323 transitions. Word has length 48 [2023-02-17 22:07:53,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:53,529 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 323 transitions. [2023-02-17 22:07:53,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-17 22:07:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 323 transitions. [2023-02-17 22:07:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 22:07:53,531 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:53,531 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:53,539 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 22:07:53,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:53,736 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1862966097, now seen corresponding path program 2 times [2023-02-17 22:07:53,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:53,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877357859] [2023-02-17 22:07:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:53,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:53,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:53,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:53,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:07:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:53,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 22:07:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:53,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-17 22:07:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:07:53,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:53,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877357859] [2023-02-17 22:07:53,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877357859] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:53,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763762223] [2023-02-17 22:07:53,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 22:07:53,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:53,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:53,925 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 22:07:53,933 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 22:07:53,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 22:07:53,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 22:07:53,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 22:07:53,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:07:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 22:07:54,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:07:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:07:54,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763762223] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:07:54,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:07:54,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-17 22:07:54,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28680619] [2023-02-17 22:07:54,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:07:54,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 22:07:54,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:54,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 22:07:54,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-17 22:07:54,468 INFO L87 Difference]: Start difference. First operand 221 states and 323 transitions. Second operand has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-17 22:07:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:56,059 INFO L93 Difference]: Finished difference Result 393 states and 618 transitions. [2023-02-17 22:07:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-17 22:07:56,060 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 48 [2023-02-17 22:07:56,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:56,062 INFO L225 Difference]: With dead ends: 393 [2023-02-17 22:07:56,062 INFO L226 Difference]: Without dead ends: 380 [2023-02-17 22:07:56,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=3183, Unknown=0, NotChecked=0, Total=3540 [2023-02-17 22:07:56,064 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 456 mSDsluCounter, 3094 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:56,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 3283 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 22:07:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-17 22:07:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 241. [2023-02-17 22:07:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 191 states have (on average 1.2984293193717278) internal successors, (248), 201 states have internal predecessors, (248), 31 states have call successors, (31), 7 states have call predecessors, (31), 18 states have return successors, (101), 32 states have call predecessors, (101), 30 states have call successors, (101) [2023-02-17 22:07:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 380 transitions. [2023-02-17 22:07:56,105 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 380 transitions. Word has length 48 [2023-02-17 22:07:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:56,106 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 380 transitions. [2023-02-17 22:07:56,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-17 22:07:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 380 transitions. [2023-02-17 22:07:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 22:07:56,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:56,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:56,121 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 22:07:56,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-17 22:07:56,313 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash 99734158, now seen corresponding path program 1 times [2023-02-17 22:07:56,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:56,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653161425] [2023-02-17 22:07:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:56,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:07:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:07:56,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653161425] [2023-02-17 22:07:56,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653161425] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398625197] [2023-02-17 22:07:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:56,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:56,389 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 22:07:56,393 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 22:07:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 22:07:56,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:07:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:07:56,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 22:07:56,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398625197] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:07:56,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 22:07:56,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-02-17 22:07:56,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089635811] [2023-02-17 22:07:56,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:07:56,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 22:07:56,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:56,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 22:07:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-02-17 22:07:56,504 INFO L87 Difference]: Start difference. First operand 241 states and 380 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 22:07:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:56,619 INFO L93 Difference]: Finished difference Result 404 states and 607 transitions. [2023-02-17 22:07:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 22:07:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-02-17 22:07:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:56,622 INFO L225 Difference]: With dead ends: 404 [2023-02-17 22:07:56,622 INFO L226 Difference]: Without dead ends: 329 [2023-02-17 22:07:56,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-02-17 22:07:56,623 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 156 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:56,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 950 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:07:56,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-17 22:07:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 298. [2023-02-17 22:07:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 241 states have (on average 1.3070539419087137) internal successors, (315), 252 states have internal predecessors, (315), 36 states have call successors, (36), 8 states have call predecessors, (36), 20 states have return successors, (90), 37 states have call predecessors, (90), 35 states have call successors, (90) [2023-02-17 22:07:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 441 transitions. [2023-02-17 22:07:56,646 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 441 transitions. Word has length 49 [2023-02-17 22:07:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:56,646 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 441 transitions. [2023-02-17 22:07:56,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 22:07:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 441 transitions. [2023-02-17 22:07:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 22:07:56,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:56,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:56,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 22:07:56,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:56,857 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:56,857 INFO L85 PathProgramCache]: Analyzing trace with hash -709612468, now seen corresponding path program 1 times [2023-02-17 22:07:56,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:56,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982284578] [2023-02-17 22:07:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:56,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:07:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:07:56,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:56,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982284578] [2023-02-17 22:07:56,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982284578] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:56,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438694634] [2023-02-17 22:07:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:56,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:56,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:56,926 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 22:07:56,934 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 22:07:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:56,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 22:07:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:07:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:07:57,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:07:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:07:57,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438694634] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:07:57,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:07:57,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-17 22:07:57,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558529768] [2023-02-17 22:07:57,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:07:57,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 22:07:57,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:57,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 22:07:57,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-17 22:07:57,107 INFO L87 Difference]: Start difference. First operand 298 states and 441 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 22:07:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:57,215 INFO L93 Difference]: Finished difference Result 461 states and 657 transitions. [2023-02-17 22:07:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 22:07:57,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 49 [2023-02-17 22:07:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:57,217 INFO L225 Difference]: With dead ends: 461 [2023-02-17 22:07:57,217 INFO L226 Difference]: Without dead ends: 309 [2023-02-17 22:07:57,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-02-17 22:07:57,218 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 31 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:57,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1342 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:07:57,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-02-17 22:07:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 288. [2023-02-17 22:07:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 233 states have (on average 1.2918454935622317) internal successors, (301), 244 states have internal predecessors, (301), 34 states have call successors, (34), 9 states have call predecessors, (34), 20 states have return successors, (84), 34 states have call predecessors, (84), 33 states have call successors, (84) [2023-02-17 22:07:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 419 transitions. [2023-02-17 22:07:57,240 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 419 transitions. Word has length 49 [2023-02-17 22:07:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:57,241 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 419 transitions. [2023-02-17 22:07:57,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 22:07:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 419 transitions. [2023-02-17 22:07:57,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 22:07:57,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:57,243 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:57,249 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 22:07:57,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:57,449 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash -976885673, now seen corresponding path program 1 times [2023-02-17 22:07:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753432447] [2023-02-17 22:07:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:57,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:57,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:57,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:07:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:57,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 22:07:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:57,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-17 22:07:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 22:07:57,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:57,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753432447] [2023-02-17 22:07:57,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753432447] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:57,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966144626] [2023-02-17 22:07:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:57,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:57,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:57,590 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 22:07:57,593 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 22:07:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 22:07:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:07:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 22:07:57,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:07:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 22:07:57,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966144626] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:07:57,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:07:57,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2023-02-17 22:07:57,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345689191] [2023-02-17 22:07:57,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:07:57,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 22:07:57,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 22:07:57,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-02-17 22:07:57,804 INFO L87 Difference]: Start difference. First operand 288 states and 419 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-17 22:07:58,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:58,325 INFO L93 Difference]: Finished difference Result 698 states and 1037 transitions. [2023-02-17 22:07:58,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 22:07:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 50 [2023-02-17 22:07:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:58,328 INFO L225 Difference]: With dead ends: 698 [2023-02-17 22:07:58,328 INFO L226 Difference]: Without dead ends: 402 [2023-02-17 22:07:58,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 22:07:58,330 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 156 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:58,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 2168 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 22:07:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-02-17 22:07:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 287. [2023-02-17 22:07:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 233 states have (on average 1.2875536480686696) internal successors, (300), 243 states have internal predecessors, (300), 33 states have call successors, (33), 10 states have call predecessors, (33), 20 states have return successors, (82), 33 states have call predecessors, (82), 32 states have call successors, (82) [2023-02-17 22:07:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 415 transitions. [2023-02-17 22:07:58,352 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 415 transitions. Word has length 50 [2023-02-17 22:07:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:58,352 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 415 transitions. [2023-02-17 22:07:58,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-17 22:07:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 415 transitions. [2023-02-17 22:07:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 22:07:58,354 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:58,354 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:07:58,359 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 22:07:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-17 22:07:58,560 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:58,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash 530714905, now seen corresponding path program 2 times [2023-02-17 22:07:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:58,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834045169] [2023-02-17 22:07:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:58,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:58,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:58,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:07:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:58,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 22:07:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:58,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-17 22:07:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 22:07:58,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:58,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834045169] [2023-02-17 22:07:58,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834045169] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:07:58,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85725163] [2023-02-17 22:07:58,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 22:07:58,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:07:58,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:07:58,663 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 22:07:58,665 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 22:07:58,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 22:07:58,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 22:07:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 22:07:58,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:07:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 22:07:58,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:07:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:07:58,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85725163] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:07:58,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:07:58,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 10] total 21 [2023-02-17 22:07:58,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960232394] [2023-02-17 22:07:58,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:07:58,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 22:07:58,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:58,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 22:07:58,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-02-17 22:07:58,899 INFO L87 Difference]: Start difference. First operand 287 states and 415 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-17 22:07:59,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:59,516 INFO L93 Difference]: Finished difference Result 572 states and 877 transitions. [2023-02-17 22:07:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 22:07:59,517 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 50 [2023-02-17 22:07:59,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:59,520 INFO L225 Difference]: With dead ends: 572 [2023-02-17 22:07:59,520 INFO L226 Difference]: Without dead ends: 553 [2023-02-17 22:07:59,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 22:07:59,522 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 308 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:59,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 2060 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 22:07:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-02-17 22:07:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 298. [2023-02-17 22:07:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 239 states have (on average 1.2761506276150627) internal successors, (305), 250 states have internal predecessors, (305), 37 states have call successors, (37), 10 states have call predecessors, (37), 21 states have return successors, (106), 37 states have call predecessors, (106), 36 states have call successors, (106) [2023-02-17 22:07:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 448 transitions. [2023-02-17 22:07:59,553 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 448 transitions. Word has length 50 [2023-02-17 22:07:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:59,553 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 448 transitions. [2023-02-17 22:07:59,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-17 22:07:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 448 transitions. [2023-02-17 22:07:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 22:07:59,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:59,555 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 22:07:59,561 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 22:07:59,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 22:07:59,761 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:59,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1026658085, now seen corresponding path program 1 times [2023-02-17 22:07:59,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:59,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72954832] [2023-02-17 22:07:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:59,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:59,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:07:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:59,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:07:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:59,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:07:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:07:59,827 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 22:07:59,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:07:59,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72954832] [2023-02-17 22:07:59,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72954832] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:07:59,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:07:59,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 22:07:59,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922654064] [2023-02-17 22:07:59,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:07:59,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 22:07:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:07:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 22:07:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-17 22:07:59,829 INFO L87 Difference]: Start difference. First operand 298 states and 448 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:07:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:07:59,940 INFO L93 Difference]: Finished difference Result 438 states and 650 transitions. [2023-02-17 22:07:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 22:07:59,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2023-02-17 22:07:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:07:59,942 INFO L225 Difference]: With dead ends: 438 [2023-02-17 22:07:59,942 INFO L226 Difference]: Without dead ends: 320 [2023-02-17 22:07:59,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:07:59,943 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 162 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:07:59,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1286 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:07:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-17 22:07:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 298. [2023-02-17 22:07:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 239 states have (on average 1.2719665271966527) internal successors, (304), 250 states have internal predecessors, (304), 37 states have call successors, (37), 10 states have call predecessors, (37), 21 states have return successors, (106), 37 states have call predecessors, (106), 36 states have call successors, (106) [2023-02-17 22:07:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 447 transitions. [2023-02-17 22:07:59,969 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 447 transitions. Word has length 49 [2023-02-17 22:07:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:07:59,970 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 447 transitions. [2023-02-17 22:07:59,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:07:59,970 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 447 transitions. [2023-02-17 22:07:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 22:07:59,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:07:59,974 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 22:07:59,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 22:07:59,975 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:07:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:07:59,975 INFO L85 PathProgramCache]: Analyzing trace with hash 439852071, now seen corresponding path program 1 times [2023-02-17 22:07:59,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:07:59,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502163336] [2023-02-17 22:07:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:07:59,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:07:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:08:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:00,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:08:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:00,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:08:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:00,061 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 22:08:00,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:08:00,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502163336] [2023-02-17 22:08:00,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502163336] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:08:00,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025072503] [2023-02-17 22:08:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:08:00,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:08:00,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:08:00,064 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 22:08:00,077 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 22:08:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:00,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 22:08:00,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:08:00,155 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 22:08:00,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:08:00,220 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 22:08:00,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025072503] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:08:00,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:08:00,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-17 22:08:00,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661787115] [2023-02-17 22:08:00,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:08:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 22:08:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:08:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 22:08:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-02-17 22:08:00,223 INFO L87 Difference]: Start difference. First operand 298 states and 447 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 22:08:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:08:00,377 INFO L93 Difference]: Finished difference Result 609 states and 873 transitions. [2023-02-17 22:08:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 22:08:00,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2023-02-17 22:08:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:08:00,380 INFO L225 Difference]: With dead ends: 609 [2023-02-17 22:08:00,380 INFO L226 Difference]: Without dead ends: 469 [2023-02-17 22:08:00,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-02-17 22:08:00,382 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 283 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:08:00,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1454 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:08:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-02-17 22:08:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 419. [2023-02-17 22:08:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 346 states have (on average 1.2803468208092486) internal successors, (443), 362 states have internal predecessors, (443), 43 states have call successors, (43), 13 states have call predecessors, (43), 29 states have return successors, (109), 43 states have call predecessors, (109), 42 states have call successors, (109) [2023-02-17 22:08:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 595 transitions. [2023-02-17 22:08:00,412 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 595 transitions. Word has length 49 [2023-02-17 22:08:00,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:08:00,412 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 595 transitions. [2023-02-17 22:08:00,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 22:08:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 595 transitions. [2023-02-17 22:08:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 22:08:00,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:08:00,414 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 22:08:00,424 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 22:08:00,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 22:08:00,620 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:08:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:08:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash -369494555, now seen corresponding path program 1 times [2023-02-17 22:08:00,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:08:00,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765230907] [2023-02-17 22:08:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:08:00,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:08:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:00,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:08:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:00,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:08:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:00,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:08:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:00,941 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 22:08:00,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:08:00,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765230907] [2023-02-17 22:08:00,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765230907] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:08:00,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:08:00,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-17 22:08:00,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279719396] [2023-02-17 22:08:00,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:08:00,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 22:08:00,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:08:00,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 22:08:00,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-02-17 22:08:00,945 INFO L87 Difference]: Start difference. First operand 419 states and 595 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 22:08:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:08:01,211 INFO L93 Difference]: Finished difference Result 578 states and 818 transitions. [2023-02-17 22:08:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 22:08:01,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-02-17 22:08:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:08:01,215 INFO L225 Difference]: With dead ends: 578 [2023-02-17 22:08:01,215 INFO L226 Difference]: Without dead ends: 456 [2023-02-17 22:08:01,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-02-17 22:08:01,217 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 139 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 22:08:01,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1697 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 22:08:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-02-17 22:08:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 431. [2023-02-17 22:08:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 357 states have (on average 1.2745098039215685) internal successors, (455), 371 states have internal predecessors, (455), 44 states have call successors, (44), 15 states have call predecessors, (44), 29 states have return successors, (103), 44 states have call predecessors, (103), 43 states have call successors, (103) [2023-02-17 22:08:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 602 transitions. [2023-02-17 22:08:01,251 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 602 transitions. Word has length 49 [2023-02-17 22:08:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:08:01,251 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 602 transitions. [2023-02-17 22:08:01,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 22:08:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 602 transitions. [2023-02-17 22:08:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 22:08:01,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:08:01,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:08:01,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-17 22:08:01,254 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:08:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:08:01,254 INFO L85 PathProgramCache]: Analyzing trace with hash -54328172, now seen corresponding path program 1 times [2023-02-17 22:08:01,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:08:01,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159103087] [2023-02-17 22:08:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:08:01,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:08:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:01,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:08:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:01,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:08:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:01,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 22:08:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:01,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 22:08:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:01,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-17 22:08:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:08:01,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:08:01,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159103087] [2023-02-17 22:08:01,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159103087] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:08:01,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203308596] [2023-02-17 22:08:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:08:01,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:08:01,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:08:01,473 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 22:08:01,477 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 22:08:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:01,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 22:08:01,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:08:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:08:01,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:08:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:08:01,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203308596] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:08:01,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:08:01,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-17 22:08:01,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370586326] [2023-02-17 22:08:01,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:08:01,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 22:08:01,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:08:01,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 22:08:01,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-17 22:08:01,854 INFO L87 Difference]: Start difference. First operand 431 states and 602 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 22:08:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:08:02,903 INFO L93 Difference]: Finished difference Result 535 states and 775 transitions. [2023-02-17 22:08:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 22:08:02,904 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2023-02-17 22:08:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:08:02,906 INFO L225 Difference]: With dead ends: 535 [2023-02-17 22:08:02,906 INFO L226 Difference]: Without dead ends: 503 [2023-02-17 22:08:02,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2023-02-17 22:08:02,910 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 284 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 22:08:02,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1974 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 22:08:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-17 22:08:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 422. [2023-02-17 22:08:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 350 states have (on average 1.28) internal successors, (448), 364 states have internal predecessors, (448), 43 states have call successors, (43), 13 states have call predecessors, (43), 28 states have return successors, (100), 44 states have call predecessors, (100), 42 states have call successors, (100) [2023-02-17 22:08:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 591 transitions. [2023-02-17 22:08:02,948 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 591 transitions. Word has length 53 [2023-02-17 22:08:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:08:02,948 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 591 transitions. [2023-02-17 22:08:02,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 22:08:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 591 transitions. [2023-02-17 22:08:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 22:08:02,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:08:02,963 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:08:02,993 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 22:08:03,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:08:03,168 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:08:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:08:03,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2123574982, now seen corresponding path program 2 times [2023-02-17 22:08:03,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:08:03,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120359883] [2023-02-17 22:08:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:08:03,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:08:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:03,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:08:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:03,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:08:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:03,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:08:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:03,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-17 22:08:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:03,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-17 22:08:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:08:03,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:08:03,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120359883] [2023-02-17 22:08:03,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120359883] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:08:03,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112268118] [2023-02-17 22:08:03,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 22:08:03,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:08:03,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:08:03,392 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 22:08:03,394 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 22:08:03,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 22:08:03,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 22:08:03,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 22:08:03,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:08:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:08:03,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:08:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 22:08:03,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112268118] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:08:03,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:08:03,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-17 22:08:03,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377273875] [2023-02-17 22:08:03,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:08:03,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 22:08:03,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:08:03,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 22:08:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-17 22:08:03,768 INFO L87 Difference]: Start difference. First operand 422 states and 591 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 22:08:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:08:04,710 INFO L93 Difference]: Finished difference Result 523 states and 751 transitions. [2023-02-17 22:08:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 22:08:04,710 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2023-02-17 22:08:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:08:04,713 INFO L225 Difference]: With dead ends: 523 [2023-02-17 22:08:04,713 INFO L226 Difference]: Without dead ends: 503 [2023-02-17 22:08:04,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 22:08:04,714 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 299 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 22:08:04,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1741 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 22:08:04,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-17 22:08:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 368. [2023-02-17 22:08:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 304 states have (on average 1.2796052631578947) internal successors, (389), 316 states have internal predecessors, (389), 37 states have call successors, (37), 13 states have call predecessors, (37), 26 states have return successors, (77), 38 states have call predecessors, (77), 36 states have call successors, (77) [2023-02-17 22:08:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 503 transitions. [2023-02-17 22:08:04,750 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 503 transitions. Word has length 53 [2023-02-17 22:08:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:08:04,751 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 503 transitions. [2023-02-17 22:08:04,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 22:08:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 503 transitions. [2023-02-17 22:08:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 22:08:04,752 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:08:04,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:08:04,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 22:08:04,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:08:04,964 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:08:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:08:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash 610852760, now seen corresponding path program 1 times [2023-02-17 22:08:04,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:08:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499101615] [2023-02-17 22:08:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:08:04,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:08:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:05,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:08:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:05,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:08:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:05,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:08:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:05,107 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 22:08:05,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:08:05,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499101615] [2023-02-17 22:08:05,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499101615] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:08:05,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276878190] [2023-02-17 22:08:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:08:05,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:08:05,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:08:05,109 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 22:08:05,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 22:08:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:05,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 22:08:05,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:08:05,183 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 22:08:05,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 22:08:05,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276878190] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:08:05,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 22:08:05,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-02-17 22:08:05,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928971410] [2023-02-17 22:08:05,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:08:05,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:08:05,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:08:05,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:08:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:08:05,186 INFO L87 Difference]: Start difference. First operand 368 states and 503 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:08:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:08:05,230 INFO L93 Difference]: Finished difference Result 534 states and 767 transitions. [2023-02-17 22:08:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:08:05,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-17 22:08:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:08:05,232 INFO L225 Difference]: With dead ends: 534 [2023-02-17 22:08:05,233 INFO L226 Difference]: Without dead ends: 384 [2023-02-17 22:08:05,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:08:05,242 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 2 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 290 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 22:08:05,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 290 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:08:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-02-17 22:08:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 376. [2023-02-17 22:08:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 312 states have (on average 1.2724358974358974) internal successors, (397), 324 states have internal predecessors, (397), 37 states have call successors, (37), 13 states have call predecessors, (37), 26 states have return successors, (77), 38 states have call predecessors, (77), 36 states have call successors, (77) [2023-02-17 22:08:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 511 transitions. [2023-02-17 22:08:05,277 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 511 transitions. Word has length 52 [2023-02-17 22:08:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:08:05,278 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 511 transitions. [2023-02-17 22:08:05,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:08:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 511 transitions. [2023-02-17 22:08:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 22:08:05,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:08:05,279 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:08:05,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 22:08:05,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-17 22:08:05,485 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:08:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:08:05,485 INFO L85 PathProgramCache]: Analyzing trace with hash -198493866, now seen corresponding path program 1 times [2023-02-17 22:08:05,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:08:05,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245617601] [2023-02-17 22:08:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:08:05,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:08:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:05,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:08:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:05,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:08:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:05,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 22:08:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:05,869 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 22:08:05,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:08:05,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245617601] [2023-02-17 22:08:05,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245617601] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:08:05,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225695852] [2023-02-17 22:08:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:08:05,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:08:05,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:08:05,873 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 22:08:05,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 22:08:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:08:05,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-17 22:08:05,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:08:21,396 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 22:08:21,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:17:56,672 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 22:17:56,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225695852] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:17:56,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:17:56,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 22] total 49 [2023-02-17 22:17:56,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615481864] [2023-02-17 22:17:56,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:17:56,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-17 22:17:56,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:17:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-17 22:17:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2196, Unknown=3, NotChecked=0, Total=2352 [2023-02-17 22:17:56,675 INFO L87 Difference]: Start difference. First operand 376 states and 511 transitions. Second operand has 49 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 38 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-17 22:19:49,757 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 22:20:04,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-17 22:20:10,188 WARN L539 Checker$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 22:20:24,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-17 22:20:30,468 WARN L539 Checker$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 22:20:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:20:48,816 INFO L93 Difference]: Finished difference Result 875 states and 1363 transitions. [2023-02-17 22:20:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-17 22:20:48,817 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 38 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2023-02-17 22:20:48,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:20:48,820 INFO L225 Difference]: With dead ends: 875 [2023-02-17 22:20:48,821 INFO L226 Difference]: Without dead ends: 774 [2023-02-17 22:20:48,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 124.3s TimeCoverageRelationStatistics Valid=439, Invalid=5719, Unknown=4, NotChecked=0, Total=6162 [2023-02-17 22:20:48,825 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 505 mSDsluCounter, 5991 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 104 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 6236 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.6s IncrementalHoareTripleChecker+Time [2023-02-17 22:20:48,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 6236 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2820 Invalid, 5 Unknown, 0 Unchecked, 134.6s Time] [2023-02-17 22:20:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-02-17 22:20:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 432. [2023-02-17 22:20:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 359 states have (on average 1.2729805013927578) internal successors, (457), 374 states have internal predecessors, (457), 41 states have call successors, (41), 15 states have call predecessors, (41), 31 states have return successors, (90), 42 states have call predecessors, (90), 40 states have call successors, (90) [2023-02-17 22:20:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 588 transitions. [2023-02-17 22:20:48,896 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 588 transitions. Word has length 52 [2023-02-17 22:20:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:20:48,897 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 588 transitions. [2023-02-17 22:20:48,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 38 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-17 22:20:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 588 transitions. [2023-02-17 22:20:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 22:20:48,898 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:20:48,898 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:20:48,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 22:20:49,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:20:49,104 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:20:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:20:49,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2130390533, now seen corresponding path program 1 times [2023-02-17 22:20:49,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:20:49,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949928334] [2023-02-17 22:20:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:20:49,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:20:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:20:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:20:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:20:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 22:20:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 22:20:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:20:49,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949928334] [2023-02-17 22:20:49,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949928334] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:20:49,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:20:49,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 22:20:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398225287] [2023-02-17 22:20:49,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:20:49,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 22:20:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:20:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 22:20:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-17 22:20:49,199 INFO L87 Difference]: Start difference. First operand 432 states and 588 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 22:20:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:20:49,337 INFO L93 Difference]: Finished difference Result 447 states and 603 transitions. [2023-02-17 22:20:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 22:20:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-02-17 22:20:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:20:49,340 INFO L225 Difference]: With dead ends: 447 [2023-02-17 22:20:49,340 INFO L226 Difference]: Without dead ends: 363 [2023-02-17 22:20:49,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-17 22:20:49,342 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 8 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:20:49,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 744 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:20:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-02-17 22:20:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2023-02-17 22:20:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 301 states have (on average 1.282392026578073) internal successors, (386), 314 states have internal predecessors, (386), 35 states have call successors, (35), 12 states have call predecessors, (35), 26 states have return successors, (77), 36 states have call predecessors, (77), 34 states have call successors, (77) [2023-02-17 22:20:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 498 transitions. [2023-02-17 22:20:49,385 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 498 transitions. Word has length 53 [2023-02-17 22:20:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:20:49,386 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 498 transitions. [2023-02-17 22:20:49,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 22:20:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 498 transitions. [2023-02-17 22:20:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 22:20:49,387 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:20:49,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:20:49,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-17 22:20:49,387 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:20:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:20:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash -632379002, now seen corresponding path program 1 times [2023-02-17 22:20:49,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:20:49,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970332232] [2023-02-17 22:20:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:20:49,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:20:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:20:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:20:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:20:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,474 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 22:20:49,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:20:49,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970332232] [2023-02-17 22:20:49,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970332232] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:20:49,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:20:49,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 22:20:49,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567654350] [2023-02-17 22:20:49,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:20:49,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 22:20:49,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:20:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 22:20:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:20:49,476 INFO L87 Difference]: Start difference. First operand 363 states and 498 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:20:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:20:49,544 INFO L93 Difference]: Finished difference Result 526 states and 751 transitions. [2023-02-17 22:20:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 22:20:49,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-17 22:20:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:20:49,547 INFO L225 Difference]: With dead ends: 526 [2023-02-17 22:20:49,547 INFO L226 Difference]: Without dead ends: 383 [2023-02-17 22:20:49,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 6 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 22:20:49,549 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 1 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:20:49,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 276 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:20:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-17 22:20:49,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2023-02-17 22:20:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 307 states have (on average 1.276872964169381) internal successors, (392), 320 states have internal predecessors, (392), 35 states have call successors, (35), 12 states have call predecessors, (35), 26 states have return successors, (77), 36 states have call predecessors, (77), 34 states have call successors, (77) [2023-02-17 22:20:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 504 transitions. [2023-02-17 22:20:49,591 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 504 transitions. Word has length 52 [2023-02-17 22:20:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:20:49,591 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 504 transitions. [2023-02-17 22:20:49,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 22:20:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 504 transitions. [2023-02-17 22:20:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 22:20:49,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:20:49,593 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] [2023-02-17 22:20:49,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-17 22:20:49,593 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:20:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:20:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1219185016, now seen corresponding path program 2 times [2023-02-17 22:20:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:20:49,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409364724] [2023-02-17 22:20:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:20:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:20:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:20:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:20:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:20:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:49,693 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 22:20:49,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:20:49,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409364724] [2023-02-17 22:20:49,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409364724] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:20:49,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262309] [2023-02-17 22:20:49,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 22:20:49,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:20:49,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:20:49,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 22:20:49,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 22:20:49,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 22:20:49,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 22:20:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 22:20:49,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:20:49,806 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 22:20:49,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:20:49,876 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 22:20:49,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262309] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:20:49,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:20:49,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-02-17 22:20:49,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754803717] [2023-02-17 22:20:49,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:20:49,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 22:20:49,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:20:49,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 22:20:49,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-17 22:20:49,878 INFO L87 Difference]: Start difference. First operand 369 states and 504 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 22:20:50,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:20:50,043 INFO L93 Difference]: Finished difference Result 471 states and 637 transitions. [2023-02-17 22:20:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 22:20:50,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2023-02-17 22:20:50,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:20:50,052 INFO L225 Difference]: With dead ends: 471 [2023-02-17 22:20:50,052 INFO L226 Difference]: Without dead ends: 365 [2023-02-17 22:20:50,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-02-17 22:20:50,053 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 133 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:20:50,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1023 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 22:20:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-02-17 22:20:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 358. [2023-02-17 22:20:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 296 states have (on average 1.2736486486486487) internal successors, (377), 309 states have internal predecessors, (377), 35 states have call successors, (35), 12 states have call predecessors, (35), 26 states have return successors, (77), 36 states have call predecessors, (77), 34 states have call successors, (77) [2023-02-17 22:20:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 489 transitions. [2023-02-17 22:20:50,101 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 489 transitions. Word has length 52 [2023-02-17 22:20:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:20:50,102 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 489 transitions. [2023-02-17 22:20:50,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 22:20:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 489 transitions. [2023-02-17 22:20:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 22:20:50,103 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:20:50,103 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:20:50,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 22:20:50,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:20:50,309 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:20:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:20:50,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2054713926, now seen corresponding path program 1 times [2023-02-17 22:20:50,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:20:50,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134626672] [2023-02-17 22:20:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:20:50,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:20:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:50,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 22:20:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:50,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 22:20:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:50,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 22:20:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:50,730 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 22:20:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:20:50,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134626672] [2023-02-17 22:20:50,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134626672] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:20:50,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416575919] [2023-02-17 22:20:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:20:50,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:20:50,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:20:50,732 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 22:20:50,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 22:20:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:20:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 22:20:50,834 INFO L286 TraceCheckSpWp]: Computing forward predicates...