./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 7e1ff0e6 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-?-7e1ff0e [2023-02-14 22:32:36,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:32:36,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:32:36,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:32:36,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:32:36,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:32:36,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:32:36,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:32:36,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:32:36,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:32:36,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:32:36,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:32:36,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:32:36,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:32:36,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:32:36,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:32:36,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:32:36,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:32:36,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:32:36,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:32:36,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:32:36,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:32:36,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:32:36,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:32:36,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:32:36,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:32:36,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:32:36,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:32:36,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:32:36,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:32:36,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:32:36,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:32:36,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:32:36,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:32:36,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:32:36,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:32:36,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:32:36,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:32:36,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:32:36,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:32:36,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:32:36,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:32:36,415 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:32:36,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:32:36,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:32:36,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:32:36,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:32:36,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:32:36,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:32:36,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:32:36,418 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:32:36,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:32:36,418 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:32:36,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:32:36,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:32:36,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:32:36,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:32:36,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:32:36,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:32:36,419 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:32:36,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:32:36,420 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:32:36,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:32:36,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:32:36,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:32:36,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:32:36,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:32:36,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:32:36,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:32:36,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:32:36,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:32:36,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:32:36,421 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:32:36,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:32:36,422 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:32:36,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:32:36,422 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:32:36,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2023-02-14 22:32:36,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:32:36,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:32:36,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:32:36,648 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:32:36,648 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:32:36,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-02-14 22:32:37,704 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:32:37,874 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:32:37,875 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-02-14 22:32:37,882 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa59f0a2/5ca3ea09bd624469927db008c6ef3e33/FLAGb7b248908 [2023-02-14 22:32:37,896 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa59f0a2/5ca3ea09bd624469927db008c6ef3e33 [2023-02-14 22:32:37,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:32:37,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:32:37,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:32:37,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:32:37,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:32:37,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:32:37" (1/1) ... [2023-02-14 22:32:37,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75768f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:37, skipping insertion in model container [2023-02-14 22:32:37,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:32:37" (1/1) ... [2023-02-14 22:32:37,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:32:37,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:32:38,061 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] [2023-02-14 22:32:38,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:32:38,103 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:32:38,110 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] [2023-02-14 22:32:38,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:32:38,144 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:32:38,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38 WrapperNode [2023-02-14 22:32:38,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:32:38,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:32:38,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:32:38,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:32:38,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,171 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-02-14 22:32:38,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:32:38,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:32:38,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:32:38,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:32:38,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:32:38,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:32:38,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:32:38,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:32:38,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (1/1) ... [2023-02-14 22:32:38,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:32:38,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:38,242 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) [2023-02-14 22:32:38,284 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 [2023-02-14 22:32:38,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:32:38,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:32:38,296 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-14 22:32:38,296 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-14 22:32:38,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:32:38,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:32:38,298 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-02-14 22:32:38,298 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-02-14 22:32:38,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 22:32:38,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 22:32:38,388 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:32:38,389 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:32:38,665 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:32:38,669 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:32:38,670 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 22:32:38,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:32:38 BoogieIcfgContainer [2023-02-14 22:32:38,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:32:38,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:32:38,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:32:38,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:32:38,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:32:37" (1/3) ... [2023-02-14 22:32:38,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbd0f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:32:38, skipping insertion in model container [2023-02-14 22:32:38,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:38" (2/3) ... [2023-02-14 22:32:38,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbd0f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:32:38, skipping insertion in model container [2023-02-14 22:32:38,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:32:38" (3/3) ... [2023-02-14 22:32:38,677 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2023-02-14 22:32:38,690 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:32:38,690 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 22:32:38,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:32:38,738 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;@6f7ed924, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:32:38,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 22:32:38,744 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) [2023-02-14 22:32:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 22:32:38,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:38,757 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] [2023-02-14 22:32:38,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:38,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:38,767 INFO L85 PathProgramCache]: Analyzing trace with hash -64573039, now seen corresponding path program 1 times [2023-02-14 22:32:38,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:38,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594396159] [2023-02-14 22:32:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:38,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:39,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:39,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:39,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:39,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:39,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594396159] [2023-02-14 22:32:39,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594396159] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:39,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695992069] [2023-02-14 22:32:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:39,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:39,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:39,311 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) [2023-02-14 22:32:39,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 22:32:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:39,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 22:32:39,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 22:32:39,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:39,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695992069] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:39,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:32:39,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 5] total 13 [2023-02-14 22:32:39,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688159100] [2023-02-14 22:32:39,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:39,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:32:39,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:39,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:32:39,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:32:39,574 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) [2023-02-14 22:32:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:39,624 INFO L93 Difference]: Finished difference Result 152 states and 238 transitions. [2023-02-14 22:32:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:32:39,626 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 [2023-02-14 22:32:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:39,634 INFO L225 Difference]: With dead ends: 152 [2023-02-14 22:32:39,635 INFO L226 Difference]: Without dead ends: 75 [2023-02-14 22:32:39,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:32:39,642 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 [2023-02-14 22:32:39,643 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] [2023-02-14 22:32:39,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-14 22:32:39,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-02-14 22:32:39,672 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) [2023-02-14 22:32:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 102 transitions. [2023-02-14 22:32:39,677 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 102 transitions. Word has length 39 [2023-02-14 22:32:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:39,678 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 102 transitions. [2023-02-14 22:32:39,678 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) [2023-02-14 22:32:39,678 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 102 transitions. [2023-02-14 22:32:39,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 22:32:39,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:39,681 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] [2023-02-14 22:32:39,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:39,886 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 [2023-02-14 22:32:39,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:39,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:39,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1601352673, now seen corresponding path program 1 times [2023-02-14 22:32:39,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:39,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646419657] [2023-02-14 22:32:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:39,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:40,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:40,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:40,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:40,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:40,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646419657] [2023-02-14 22:32:40,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646419657] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:40,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142716217] [2023-02-14 22:32:40,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:40,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:40,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:40,063 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) [2023-02-14 22:32:40,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 22:32:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:40,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 22:32:40,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:40,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:40,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142716217] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:40,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:40,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-14 22:32:40,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146637755] [2023-02-14 22:32:40,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:40,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 22:32:40,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 22:32:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-14 22:32:40,357 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) [2023-02-14 22:32:40,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:40,533 INFO L93 Difference]: Finished difference Result 193 states and 278 transitions. [2023-02-14 22:32:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 22:32:40,534 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 [2023-02-14 22:32:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:40,538 INFO L225 Difference]: With dead ends: 193 [2023-02-14 22:32:40,538 INFO L226 Difference]: Without dead ends: 148 [2023-02-14 22:32:40,541 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 [2023-02-14 22:32:40,542 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 [2023-02-14 22:32:40,542 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] [2023-02-14 22:32:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-14 22:32:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2023-02-14 22:32:40,552 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) [2023-02-14 22:32:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2023-02-14 22:32:40,553 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 40 [2023-02-14 22:32:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:40,554 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2023-02-14 22:32:40,554 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) [2023-02-14 22:32:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2023-02-14 22:32:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 22:32:40,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:40,555 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] [2023-02-14 22:32:40,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 22:32:40,760 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 [2023-02-14 22:32:40,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash 321488995, now seen corresponding path program 1 times [2023-02-14 22:32:40,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:40,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123570566] [2023-02-14 22:32:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:40,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:40,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:40,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:40,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:40,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:40,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123570566] [2023-02-14 22:32:40,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123570566] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:40,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:40,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 22:32:40,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55017054] [2023-02-14 22:32:40,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:40,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 22:32:40,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:40,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 22:32:40,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:32:40,899 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) [2023-02-14 22:32:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:40,971 INFO L93 Difference]: Finished difference Result 208 states and 293 transitions. [2023-02-14 22:32:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:32:40,971 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 [2023-02-14 22:32:40,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:40,972 INFO L225 Difference]: With dead ends: 208 [2023-02-14 22:32:40,972 INFO L226 Difference]: Without dead ends: 134 [2023-02-14 22:32:40,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:32:40,974 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 [2023-02-14 22:32:40,974 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] [2023-02-14 22:32:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-14 22:32:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2023-02-14 22:32:40,997 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) [2023-02-14 22:32:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 167 transitions. [2023-02-14 22:32:40,998 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 167 transitions. Word has length 40 [2023-02-14 22:32:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:40,998 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 167 transitions. [2023-02-14 22:32:40,998 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) [2023-02-14 22:32:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 167 transitions. [2023-02-14 22:32:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 22:32:40,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:41,000 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] [2023-02-14 22:32:41,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 22:32:41,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash 145642080, now seen corresponding path program 1 times [2023-02-14 22:32:41,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:41,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354302752] [2023-02-14 22:32:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:41,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 22:32:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 22:32:41,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:41,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354302752] [2023-02-14 22:32:41,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354302752] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:41,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:41,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 22:32:41,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774426184] [2023-02-14 22:32:41,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:41,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 22:32:41,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:41,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 22:32:41,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-14 22:32:41,227 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) [2023-02-14 22:32:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:41,364 INFO L93 Difference]: Finished difference Result 179 states and 253 transitions. [2023-02-14 22:32:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 22:32:41,364 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 [2023-02-14 22:32:41,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:41,365 INFO L225 Difference]: With dead ends: 179 [2023-02-14 22:32:41,365 INFO L226 Difference]: Without dead ends: 168 [2023-02-14 22:32:41,366 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 [2023-02-14 22:32:41,366 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 [2023-02-14 22:32:41,367 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] [2023-02-14 22:32:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-14 22:32:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2023-02-14 22:32:41,376 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) [2023-02-14 22:32:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 219 transitions. [2023-02-14 22:32:41,377 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 219 transitions. Word has length 44 [2023-02-14 22:32:41,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:41,377 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 219 transitions. [2023-02-14 22:32:41,377 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) [2023-02-14 22:32:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 219 transitions. [2023-02-14 22:32:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 22:32:41,379 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:41,379 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] [2023-02-14 22:32:41,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 22:32:41,379 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash 846706658, now seen corresponding path program 1 times [2023-02-14 22:32:41,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:41,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731332937] [2023-02-14 22:32:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:41,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 22:32:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:41,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:41,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731332937] [2023-02-14 22:32:41,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731332937] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:41,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:41,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-14 22:32:41,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408490243] [2023-02-14 22:32:41,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:41,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 22:32:41,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 22:32:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:32:41,658 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) [2023-02-14 22:32:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:41,928 INFO L93 Difference]: Finished difference Result 187 states and 263 transitions. [2023-02-14 22:32:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 22:32:41,929 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 [2023-02-14 22:32:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:41,933 INFO L225 Difference]: With dead ends: 187 [2023-02-14 22:32:41,933 INFO L226 Difference]: Without dead ends: 179 [2023-02-14 22:32:41,933 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 [2023-02-14 22:32:41,934 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 76 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-14 22:32:41,934 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] [2023-02-14 22:32:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-14 22:32:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2023-02-14 22:32:41,943 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) [2023-02-14 22:32:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2023-02-14 22:32:41,945 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 44 [2023-02-14 22:32:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:41,945 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2023-02-14 22:32:41,945 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) [2023-02-14 22:32:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2023-02-14 22:32:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 22:32:41,946 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:41,946 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] [2023-02-14 22:32:41,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 22:32:41,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:41,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:41,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1839755374, now seen corresponding path program 1 times [2023-02-14 22:32:41,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:41,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177830702] [2023-02-14 22:32:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:41,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:41,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:42,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:42,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177830702] [2023-02-14 22:32:42,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177830702] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:42,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:42,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 22:32:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714135738] [2023-02-14 22:32:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:42,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 22:32:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 22:32:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:32:42,024 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) [2023-02-14 22:32:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:42,096 INFO L93 Difference]: Finished difference Result 374 states and 540 transitions. [2023-02-14 22:32:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:32:42,098 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 [2023-02-14 22:32:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:42,099 INFO L225 Difference]: With dead ends: 374 [2023-02-14 22:32:42,099 INFO L226 Difference]: Without dead ends: 275 [2023-02-14 22:32:42,100 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 [2023-02-14 22:32:42,100 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 118 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:42,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1037 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-02-14 22:32:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 241. [2023-02-14 22:32:42,112 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) [2023-02-14 22:32:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 346 transitions. [2023-02-14 22:32:42,114 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 346 transitions. Word has length 44 [2023-02-14 22:32:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:42,115 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 346 transitions. [2023-02-14 22:32:42,115 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) [2023-02-14 22:32:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 346 transitions. [2023-02-14 22:32:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 22:32:42,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:42,117 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] [2023-02-14 22:32:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 22:32:42,117 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1645865296, now seen corresponding path program 1 times [2023-02-14 22:32:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:42,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894712517] [2023-02-14 22:32:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:42,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894712517] [2023-02-14 22:32:42,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894712517] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:42,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905419983] [2023-02-14 22:32:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:42,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:42,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:42,277 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) [2023-02-14 22:32:42,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 22:32:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 22:32:42,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 22:32:42,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:42,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905419983] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:42,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:32:42,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 15 [2023-02-14 22:32:42,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133340204] [2023-02-14 22:32:42,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:42,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:32:42,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:42,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:32:42,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:32:42,469 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) [2023-02-14 22:32:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:42,491 INFO L93 Difference]: Finished difference Result 375 states and 536 transitions. [2023-02-14 22:32:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:32:42,501 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 [2023-02-14 22:32:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:42,502 INFO L225 Difference]: With dead ends: 375 [2023-02-14 22:32:42,502 INFO L226 Difference]: Without dead ends: 203 [2023-02-14 22:32:42,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:32:42,503 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 [2023-02-14 22:32:42,503 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] [2023-02-14 22:32:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-14 22:32:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 181. [2023-02-14 22:32:42,513 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) [2023-02-14 22:32:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 256 transitions. [2023-02-14 22:32:42,514 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 256 transitions. Word has length 44 [2023-02-14 22:32:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:42,514 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 256 transitions. [2023-02-14 22:32:42,515 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) [2023-02-14 22:32:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 256 transitions. [2023-02-14 22:32:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 22:32:42,524 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:42,525 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] [2023-02-14 22:32:42,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:42,730 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 [2023-02-14 22:32:42,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:42,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:42,730 INFO L85 PathProgramCache]: Analyzing trace with hash -492965466, now seen corresponding path program 1 times [2023-02-14 22:32:42,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:42,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643572060] [2023-02-14 22:32:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 22:32:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 22:32:42,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:42,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643572060] [2023-02-14 22:32:42,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643572060] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:42,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:42,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:32:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482371822] [2023-02-14 22:32:42,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:42,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:32:42,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:32:42,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:32:42,813 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) [2023-02-14 22:32:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:42,838 INFO L93 Difference]: Finished difference Result 189 states and 263 transitions. [2023-02-14 22:32:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 22:32:42,839 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 [2023-02-14 22:32:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:42,840 INFO L225 Difference]: With dead ends: 189 [2023-02-14 22:32:42,840 INFO L226 Difference]: Without dead ends: 178 [2023-02-14 22:32:42,840 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 [2023-02-14 22:32:42,841 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 [2023-02-14 22:32:42,841 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] [2023-02-14 22:32:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-14 22:32:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2023-02-14 22:32:42,848 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) [2023-02-14 22:32:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 246 transitions. [2023-02-14 22:32:42,849 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 246 transitions. Word has length 46 [2023-02-14 22:32:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:42,850 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 246 transitions. [2023-02-14 22:32:42,850 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) [2023-02-14 22:32:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 246 transitions. [2023-02-14 22:32:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 22:32:42,851 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:42,851 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] [2023-02-14 22:32:42,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-14 22:32:42,851 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash 180512397, now seen corresponding path program 1 times [2023-02-14 22:32:42,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:42,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145140124] [2023-02-14 22:32:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:42,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 22:32:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 22:32:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 22:32:42,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:42,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145140124] [2023-02-14 22:32:42,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145140124] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:42,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:42,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:32:42,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978329161] [2023-02-14 22:32:42,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:42,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:32:42,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:42,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:32:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:32:42,974 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) [2023-02-14 22:32:43,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:43,140 INFO L93 Difference]: Finished difference Result 229 states and 319 transitions. [2023-02-14 22:32:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:32:43,140 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 [2023-02-14 22:32:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:43,141 INFO L225 Difference]: With dead ends: 229 [2023-02-14 22:32:43,141 INFO L226 Difference]: Without dead ends: 218 [2023-02-14 22:32:43,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-14 22:32:43,142 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 [2023-02-14 22:32:43,142 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] [2023-02-14 22:32:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-14 22:32:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 182. [2023-02-14 22:32:43,151 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) [2023-02-14 22:32:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 257 transitions. [2023-02-14 22:32:43,152 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 257 transitions. Word has length 48 [2023-02-14 22:32:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:43,153 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 257 transitions. [2023-02-14 22:32:43,153 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) [2023-02-14 22:32:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 257 transitions. [2023-02-14 22:32:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 22:32:43,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:43,154 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] [2023-02-14 22:32:43,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-14 22:32:43,154 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:43,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash 881576975, now seen corresponding path program 1 times [2023-02-14 22:32:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:43,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803468164] [2023-02-14 22:32:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:43,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:43,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:43,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:43,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:43,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 22:32:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:43,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 22:32:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:43,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:43,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803468164] [2023-02-14 22:32:43,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803468164] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:43,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936086243] [2023-02-14 22:32:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:43,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:43,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:43,330 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) [2023-02-14 22:32:43,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 22:32:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 22:32:43,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 22:32:43,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:43,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936086243] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:43,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:43,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-14 22:32:43,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200305457] [2023-02-14 22:32:43,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:43,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 22:32:43,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:43,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 22:32:43,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-14 22:32:43,876 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) [2023-02-14 22:32:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:45,539 INFO L93 Difference]: Finished difference Result 352 states and 509 transitions. [2023-02-14 22:32:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-14 22:32:45,540 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 [2023-02-14 22:32:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:45,542 INFO L225 Difference]: With dead ends: 352 [2023-02-14 22:32:45,542 INFO L226 Difference]: Without dead ends: 340 [2023-02-14 22:32:45,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2023-02-14 22:32:45,544 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 365 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 3436 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:45,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 3436 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 22:32:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-14 22:32:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 221. [2023-02-14 22:32:45,567 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) [2023-02-14 22:32:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 323 transitions. [2023-02-14 22:32:45,568 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 323 transitions. Word has length 48 [2023-02-14 22:32:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:45,569 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 323 transitions. [2023-02-14 22:32:45,570 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) [2023-02-14 22:32:45,570 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 323 transitions. [2023-02-14 22:32:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 22:32:45,570 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:45,571 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] [2023-02-14 22:32:45,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:45,775 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 [2023-02-14 22:32:45,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1862966097, now seen corresponding path program 2 times [2023-02-14 22:32:45,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:45,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075070135] [2023-02-14 22:32:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:45,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:45,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:45,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:45,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:32:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:45,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 22:32:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:45,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 22:32:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:45,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:45,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075070135] [2023-02-14 22:32:45,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075070135] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:45,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321057287] [2023-02-14 22:32:45,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:32:45,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:45,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:45,963 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) [2023-02-14 22:32:45,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 22:32:46,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:32:46,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:32:46,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 22:32:46,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 22:32:46,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:46,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321057287] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:46,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:46,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-02-14 22:32:46,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37520326] [2023-02-14 22:32:46,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:46,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 22:32:46,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:46,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 22:32:46,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-02-14 22:32:46,519 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) [2023-02-14 22:32:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:47,939 INFO L93 Difference]: Finished difference Result 393 states and 618 transitions. [2023-02-14 22:32:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-14 22:32:47,939 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 [2023-02-14 22:32:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:47,941 INFO L225 Difference]: With dead ends: 393 [2023-02-14 22:32:47,941 INFO L226 Difference]: Without dead ends: 380 [2023-02-14 22:32:47,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=3183, Unknown=0, NotChecked=0, Total=3540 [2023-02-14 22:32:47,943 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 457 mSDsluCounter, 3096 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 3285 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:47,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 3285 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 22:32:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-14 22:32:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 241. [2023-02-14 22:32:47,959 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) [2023-02-14 22:32:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 380 transitions. [2023-02-14 22:32:47,961 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 380 transitions. Word has length 48 [2023-02-14 22:32:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:47,961 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 380 transitions. [2023-02-14 22:32:47,961 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) [2023-02-14 22:32:47,962 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 380 transitions. [2023-02-14 22:32:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 22:32:47,962 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:47,963 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] [2023-02-14 22:32:47,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 22:32:48,167 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 [2023-02-14 22:32:48,168 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:48,168 INFO L85 PathProgramCache]: Analyzing trace with hash 99734158, now seen corresponding path program 1 times [2023-02-14 22:32:48,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:48,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964478883] [2023-02-14 22:32:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:48,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:48,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:48,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964478883] [2023-02-14 22:32:48,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964478883] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:48,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612665450] [2023-02-14 22:32:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:48,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:48,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:48,237 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) [2023-02-14 22:32:48,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 22:32:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 22:32:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:48,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:32:48,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612665450] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:48,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 22:32:48,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-02-14 22:32:48,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685218065] [2023-02-14 22:32:48,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:48,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:32:48,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:32:48,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-02-14 22:32:48,373 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) [2023-02-14 22:32:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:48,494 INFO L93 Difference]: Finished difference Result 404 states and 607 transitions. [2023-02-14 22:32:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:32:48,494 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 [2023-02-14 22:32:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:48,496 INFO L225 Difference]: With dead ends: 404 [2023-02-14 22:32:48,496 INFO L226 Difference]: Without dead ends: 329 [2023-02-14 22:32:48,496 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 [2023-02-14 22:32:48,497 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 [2023-02-14 22:32:48,497 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] [2023-02-14 22:32:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-14 22:32:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 298. [2023-02-14 22:32:48,514 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) [2023-02-14 22:32:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 441 transitions. [2023-02-14 22:32:48,516 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 441 transitions. Word has length 49 [2023-02-14 22:32:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:48,516 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 441 transitions. [2023-02-14 22:32:48,516 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) [2023-02-14 22:32:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 441 transitions. [2023-02-14 22:32:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 22:32:48,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:48,517 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] [2023-02-14 22:32:48,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 22:32:48,723 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 [2023-02-14 22:32:48,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash -709612468, now seen corresponding path program 1 times [2023-02-14 22:32:48,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:48,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775136316] [2023-02-14 22:32:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:48,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:48,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775136316] [2023-02-14 22:32:48,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775136316] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:48,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577622108] [2023-02-14 22:32:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:48,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:48,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:48,817 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) [2023-02-14 22:32:48,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 22:32:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 22:32:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:48,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577622108] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:49,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:49,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-02-14 22:32:49,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937557757] [2023-02-14 22:32:49,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:49,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 22:32:49,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:49,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 22:32:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-14 22:32:49,057 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) [2023-02-14 22:32:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:49,150 INFO L93 Difference]: Finished difference Result 461 states and 657 transitions. [2023-02-14 22:32:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:32:49,151 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 [2023-02-14 22:32:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:49,152 INFO L225 Difference]: With dead ends: 461 [2023-02-14 22:32:49,152 INFO L226 Difference]: Without dead ends: 309 [2023-02-14 22:32:49,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-02-14 22:32:49,153 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 [2023-02-14 22:32:49,153 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] [2023-02-14 22:32:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-02-14 22:32:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 288. [2023-02-14 22:32:49,169 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) [2023-02-14 22:32:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 419 transitions. [2023-02-14 22:32:49,170 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 419 transitions. Word has length 49 [2023-02-14 22:32:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:49,170 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 419 transitions. [2023-02-14 22:32:49,171 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) [2023-02-14 22:32:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 419 transitions. [2023-02-14 22:32:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 22:32:49,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:49,172 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] [2023-02-14 22:32:49,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:49,376 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 [2023-02-14 22:32:49,377 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash -976885673, now seen corresponding path program 1 times [2023-02-14 22:32:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:49,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632020705] [2023-02-14 22:32:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:49,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:49,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:49,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:49,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:49,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 22:32:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:49,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 22:32:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 22:32:49,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:49,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632020705] [2023-02-14 22:32:49,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632020705] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:49,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381695735] [2023-02-14 22:32:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:49,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:49,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:49,569 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) [2023-02-14 22:32:49,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 22:32:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:49,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 22:32:49,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 22:32:49,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 22:32:49,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381695735] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:49,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:49,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2023-02-14 22:32:49,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378022704] [2023-02-14 22:32:49,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:49,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 22:32:49,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:49,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 22:32:49,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-02-14 22:32:49,907 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) [2023-02-14 22:32:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:50,381 INFO L93 Difference]: Finished difference Result 698 states and 1037 transitions. [2023-02-14 22:32:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 22:32:50,381 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 [2023-02-14 22:32:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:50,383 INFO L225 Difference]: With dead ends: 698 [2023-02-14 22:32:50,383 INFO L226 Difference]: Without dead ends: 402 [2023-02-14 22:32:50,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 22:32:50,385 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 156 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-02-14 22:32:50,385 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] [2023-02-14 22:32:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-02-14 22:32:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 287. [2023-02-14 22:32:50,427 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) [2023-02-14 22:32:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 415 transitions. [2023-02-14 22:32:50,430 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 415 transitions. Word has length 50 [2023-02-14 22:32:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:50,430 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 415 transitions. [2023-02-14 22:32:50,430 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) [2023-02-14 22:32:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 415 transitions. [2023-02-14 22:32:50,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 22:32:50,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:50,431 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] [2023-02-14 22:32:50,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 22:32:50,636 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 [2023-02-14 22:32:50,636 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:50,637 INFO L85 PathProgramCache]: Analyzing trace with hash 530714905, now seen corresponding path program 2 times [2023-02-14 22:32:50,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:50,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146796617] [2023-02-14 22:32:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:50,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:50,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:50,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:50,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:32:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:50,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 22:32:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:50,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 22:32:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 22:32:50,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:50,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146796617] [2023-02-14 22:32:50,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146796617] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:50,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614268849] [2023-02-14 22:32:50,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:32:50,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:50,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:50,753 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) [2023-02-14 22:32:50,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 22:32:50,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:32:50,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:32:50,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 22:32:50,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 22:32:50,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:51,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614268849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:51,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:51,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 10] total 21 [2023-02-14 22:32:51,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451561838] [2023-02-14 22:32:51,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:51,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 22:32:51,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:51,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 22:32:51,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-02-14 22:32:51,113 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) [2023-02-14 22:32:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:51,675 INFO L93 Difference]: Finished difference Result 572 states and 877 transitions. [2023-02-14 22:32:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 22:32:51,676 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 [2023-02-14 22:32:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:51,677 INFO L225 Difference]: With dead ends: 572 [2023-02-14 22:32:51,678 INFO L226 Difference]: Without dead ends: 553 [2023-02-14 22:32:51,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 22:32:51,678 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 308 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:51,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 2060 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:32:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-02-14 22:32:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 298. [2023-02-14 22:32:51,699 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) [2023-02-14 22:32:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 448 transitions. [2023-02-14 22:32:51,701 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 448 transitions. Word has length 50 [2023-02-14 22:32:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:51,702 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 448 transitions. [2023-02-14 22:32:51,702 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) [2023-02-14 22:32:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 448 transitions. [2023-02-14 22:32:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 22:32:51,706 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:51,706 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] [2023-02-14 22:32:51,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:51,911 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 [2023-02-14 22:32:51,911 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1026658085, now seen corresponding path program 1 times [2023-02-14 22:32:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:51,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445368474] [2023-02-14 22:32:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:51,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:51,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:51,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:32:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 22:32:51,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445368474] [2023-02-14 22:32:51,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445368474] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:51,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:51,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:32:51,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573718894] [2023-02-14 22:32:51,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:51,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:32:51,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:51,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:32:51,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:32:51,992 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) [2023-02-14 22:32:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:52,098 INFO L93 Difference]: Finished difference Result 438 states and 650 transitions. [2023-02-14 22:32:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:32:52,098 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 [2023-02-14 22:32:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:52,099 INFO L225 Difference]: With dead ends: 438 [2023-02-14 22:32:52,100 INFO L226 Difference]: Without dead ends: 320 [2023-02-14 22:32:52,100 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 [2023-02-14 22:32:52,101 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 [2023-02-14 22:32:52,101 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] [2023-02-14 22:32:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-14 22:32:52,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 298. [2023-02-14 22:32:52,121 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) [2023-02-14 22:32:52,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 447 transitions. [2023-02-14 22:32:52,123 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 447 transitions. Word has length 49 [2023-02-14 22:32:52,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:52,123 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 447 transitions. [2023-02-14 22:32:52,123 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) [2023-02-14 22:32:52,123 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 447 transitions. [2023-02-14 22:32:52,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 22:32:52,124 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:52,124 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] [2023-02-14 22:32:52,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-14 22:32:52,125 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:52,125 INFO L85 PathProgramCache]: Analyzing trace with hash 439852071, now seen corresponding path program 1 times [2023-02-14 22:32:52,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:52,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066929098] [2023-02-14 22:32:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:52,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:52,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:52,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:52,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:32:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 22:32:52,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:52,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066929098] [2023-02-14 22:32:52,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066929098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:52,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754137481] [2023-02-14 22:32:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:52,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:52,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:52,186 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) [2023-02-14 22:32:52,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 22:32:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:52,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 22:32:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 22:32:52,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 22:32:52,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754137481] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:52,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:52,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-14 22:32:52,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481494674] [2023-02-14 22:32:52,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:52,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 22:32:52,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:52,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 22:32:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-02-14 22:32:52,340 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) [2023-02-14 22:32:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:52,467 INFO L93 Difference]: Finished difference Result 609 states and 873 transitions. [2023-02-14 22:32:52,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:32:52,468 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 [2023-02-14 22:32:52,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:52,470 INFO L225 Difference]: With dead ends: 609 [2023-02-14 22:32:52,470 INFO L226 Difference]: Without dead ends: 469 [2023-02-14 22:32:52,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-02-14 22:32:52,471 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 [2023-02-14 22:32:52,471 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] [2023-02-14 22:32:52,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-02-14 22:32:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 419. [2023-02-14 22:32:52,493 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) [2023-02-14 22:32:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 595 transitions. [2023-02-14 22:32:52,495 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 595 transitions. Word has length 49 [2023-02-14 22:32:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:52,495 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 595 transitions. [2023-02-14 22:32:52,495 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) [2023-02-14 22:32:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 595 transitions. [2023-02-14 22:32:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 22:32:52,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:52,496 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] [2023-02-14 22:32:52,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:52,701 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 [2023-02-14 22:32:52,701 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash -369494555, now seen corresponding path program 1 times [2023-02-14 22:32:52,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:52,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083253982] [2023-02-14 22:32:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:52,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:52,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:52,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:52,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:32:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 22:32:52,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:52,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083253982] [2023-02-14 22:32:52,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083253982] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:52,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:52,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-14 22:32:52,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756424609] [2023-02-14 22:32:52,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:52,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 22:32:52,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:52,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 22:32:52,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:32:52,964 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) [2023-02-14 22:32:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:53,221 INFO L93 Difference]: Finished difference Result 578 states and 818 transitions. [2023-02-14 22:32:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 22:32:53,222 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 [2023-02-14 22:32:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:53,224 INFO L225 Difference]: With dead ends: 578 [2023-02-14 22:32:53,224 INFO L226 Difference]: Without dead ends: 456 [2023-02-14 22:32:53,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-02-14 22:32:53,225 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 139 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-14 22:32:53,225 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] [2023-02-14 22:32:53,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-02-14 22:32:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 431. [2023-02-14 22:32:53,249 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) [2023-02-14 22:32:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 602 transitions. [2023-02-14 22:32:53,251 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 602 transitions. Word has length 49 [2023-02-14 22:32:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:53,251 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 602 transitions. [2023-02-14 22:32:53,252 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) [2023-02-14 22:32:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 602 transitions. [2023-02-14 22:32:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 22:32:53,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:53,253 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] [2023-02-14 22:32:53,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-14 22:32:53,254 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash -54328172, now seen corresponding path program 1 times [2023-02-14 22:32:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:53,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815259012] [2023-02-14 22:32:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:53,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:53,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:53,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:53,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-14 22:32:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:53,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-14 22:32:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:53,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:53,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815259012] [2023-02-14 22:32:53,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815259012] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:53,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407003561] [2023-02-14 22:32:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:53,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:53,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:53,485 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) [2023-02-14 22:32:53,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 22:32:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:53,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 22:32:53,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:53,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:53,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407003561] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:53,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:53,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-14 22:32:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260678463] [2023-02-14 22:32:53,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:53,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 22:32:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 22:32:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-14 22:32:53,818 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) [2023-02-14 22:32:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:54,437 INFO L93 Difference]: Finished difference Result 535 states and 775 transitions. [2023-02-14 22:32:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 22:32:54,438 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 [2023-02-14 22:32:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:54,439 INFO L225 Difference]: With dead ends: 535 [2023-02-14 22:32:54,439 INFO L226 Difference]: Without dead ends: 503 [2023-02-14 22:32:54,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 22:32:54,440 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 284 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:54,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1974 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:32:54,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-14 22:32:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 422. [2023-02-14 22:32:54,464 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) [2023-02-14 22:32:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 591 transitions. [2023-02-14 22:32:54,466 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 591 transitions. Word has length 53 [2023-02-14 22:32:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:54,466 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 591 transitions. [2023-02-14 22:32:54,466 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) [2023-02-14 22:32:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 591 transitions. [2023-02-14 22:32:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 22:32:54,467 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:54,467 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] [2023-02-14 22:32:54,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:54,671 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 [2023-02-14 22:32:54,672 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:54,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:54,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2123574982, now seen corresponding path program 2 times [2023-02-14 22:32:54,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:54,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323954576] [2023-02-14 22:32:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:54,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:54,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:54,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:54,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:54,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-14 22:32:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:54,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-14 22:32:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:54,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:54,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323954576] [2023-02-14 22:32:54,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323954576] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:54,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143451284] [2023-02-14 22:32:54,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:32:54,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:54,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:54,853 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) [2023-02-14 22:32:54,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 22:32:54,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:32:54,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:32:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 22:32:54,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:54,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 22:32:55,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143451284] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:55,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:55,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-14 22:32:55,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786800910] [2023-02-14 22:32:55,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:55,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 22:32:55,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 22:32:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-14 22:32:55,230 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) [2023-02-14 22:32:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:55,776 INFO L93 Difference]: Finished difference Result 523 states and 751 transitions. [2023-02-14 22:32:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 22:32:55,779 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 [2023-02-14 22:32:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:55,782 INFO L225 Difference]: With dead ends: 523 [2023-02-14 22:32:55,782 INFO L226 Difference]: Without dead ends: 503 [2023-02-14 22:32:55,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 22:32:55,783 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 299 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:55,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1741 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:32:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-14 22:32:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 368. [2023-02-14 22:32:55,817 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) [2023-02-14 22:32:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 503 transitions. [2023-02-14 22:32:55,818 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 503 transitions. Word has length 53 [2023-02-14 22:32:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:55,819 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 503 transitions. [2023-02-14 22:32:55,819 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) [2023-02-14 22:32:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 503 transitions. [2023-02-14 22:32:55,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 22:32:55,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:55,820 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] [2023-02-14 22:32:55,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-14 22:32:56,024 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 [2023-02-14 22:32:56,025 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:56,026 INFO L85 PathProgramCache]: Analyzing trace with hash 610852760, now seen corresponding path program 1 times [2023-02-14 22:32:56,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:56,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607160025] [2023-02-14 22:32:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:56,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:56,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:56,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:56,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 22:32:56,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:56,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607160025] [2023-02-14 22:32:56,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607160025] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:56,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525289468] [2023-02-14 22:32:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:56,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:56,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:56,183 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) [2023-02-14 22:32:56,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 22:32:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:56,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 22:32:56,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 22:32:56,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:32:56,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525289468] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:56,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 22:32:56,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-02-14 22:32:56,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364187421] [2023-02-14 22:32:56,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:56,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:32:56,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:32:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:32:56,246 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) [2023-02-14 22:32:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:56,290 INFO L93 Difference]: Finished difference Result 534 states and 767 transitions. [2023-02-14 22:32:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:32:56,290 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 [2023-02-14 22:32:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:56,292 INFO L225 Difference]: With dead ends: 534 [2023-02-14 22:32:56,292 INFO L226 Difference]: Without dead ends: 384 [2023-02-14 22:32:56,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:32:56,293 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 [2023-02-14 22:32:56,293 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] [2023-02-14 22:32:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-02-14 22:32:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 376. [2023-02-14 22:32:56,317 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) [2023-02-14 22:32:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 511 transitions. [2023-02-14 22:32:56,318 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 511 transitions. Word has length 52 [2023-02-14 22:32:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:56,319 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 511 transitions. [2023-02-14 22:32:56,319 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) [2023-02-14 22:32:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 511 transitions. [2023-02-14 22:32:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 22:32:56,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:56,320 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] [2023-02-14 22:32:56,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:56,534 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 [2023-02-14 22:32:56,536 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:56,537 INFO L85 PathProgramCache]: Analyzing trace with hash -198493866, now seen corresponding path program 1 times [2023-02-14 22:32:56,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:56,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292880008] [2023-02-14 22:32:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:56,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:56,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:56,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:56,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:32:56,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:56,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292880008] [2023-02-14 22:32:56,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292880008] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:56,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694114771] [2023-02-14 22:32:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:56,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:56,956 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) [2023-02-14 22:32:56,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 22:32:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-14 22:32:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:33:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:33:01,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:33:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:33:02,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694114771] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:33:02,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:33:02,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 48 [2023-02-14 22:33:02,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197120189] [2023-02-14 22:33:02,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:33:02,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-14 22:33:02,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:33:02,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-14 22:33:02,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2110, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 22:33:02,330 INFO L87 Difference]: Start difference. First operand 376 states and 511 transitions. Second operand has 48 states, 42 states have (on average 2.119047619047619) internal successors, (89), 37 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-14 22:33:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:33:04,302 INFO L93 Difference]: Finished difference Result 602 states and 842 transitions. [2023-02-14 22:33:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 22:33:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 42 states have (on average 2.119047619047619) internal successors, (89), 37 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2023-02-14 22:33:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:33:04,306 INFO L225 Difference]: With dead ends: 602 [2023-02-14 22:33:04,306 INFO L226 Difference]: Without dead ends: 501 [2023-02-14 22:33:04,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=372, Invalid=4884, Unknown=0, NotChecked=0, Total=5256 [2023-02-14 22:33:04,310 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 487 mSDsluCounter, 4036 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 4206 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:33:04,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 4206 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-14 22:33:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-02-14 22:33:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 432. [2023-02-14 22:33:04,367 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) [2023-02-14 22:33:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 588 transitions. [2023-02-14 22:33:04,368 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 588 transitions. Word has length 52 [2023-02-14 22:33:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:33:04,369 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 588 transitions. [2023-02-14 22:33:04,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 42 states have (on average 2.119047619047619) internal successors, (89), 37 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-14 22:33:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 588 transitions. [2023-02-14 22:33:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 22:33:04,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:33:04,370 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] [2023-02-14 22:33:04,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 22:33:04,574 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 [2023-02-14 22:33:04,575 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:33:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:33:04,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2130390533, now seen corresponding path program 1 times [2023-02-14 22:33:04,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:33:04,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035687819] [2023-02-14 22:33:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:33:04,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:33:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:33:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:33:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:33:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 22:33:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:33:04,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:33:04,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035687819] [2023-02-14 22:33:04,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035687819] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:33:04,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:33:04,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 22:33:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989389795] [2023-02-14 22:33:04,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:33:04,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 22:33:04,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:33:04,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 22:33:04,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:33:04,654 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) [2023-02-14 22:33:04,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:33:04,719 INFO L93 Difference]: Finished difference Result 447 states and 603 transitions. [2023-02-14 22:33:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:33:04,720 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 [2023-02-14 22:33:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:33:04,721 INFO L225 Difference]: With dead ends: 447 [2023-02-14 22:33:04,721 INFO L226 Difference]: Without dead ends: 363 [2023-02-14 22:33:04,722 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 [2023-02-14 22:33:04,722 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:33:04,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 744 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:33:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-02-14 22:33:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2023-02-14 22:33:04,749 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) [2023-02-14 22:33:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 498 transitions. [2023-02-14 22:33:04,750 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 498 transitions. Word has length 53 [2023-02-14 22:33:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:33:04,750 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 498 transitions. [2023-02-14 22:33:04,750 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) [2023-02-14 22:33:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 498 transitions. [2023-02-14 22:33:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 22:33:04,751 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:33:04,751 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] [2023-02-14 22:33:04,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-14 22:33:04,751 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:33:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:33:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -632379002, now seen corresponding path program 1 times [2023-02-14 22:33:04,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:33:04,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672579764] [2023-02-14 22:33:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:33:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:33:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:33:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:33:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:33:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 22:33:04,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:33:04,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672579764] [2023-02-14 22:33:04,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672579764] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:33:04,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:33:04,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:33:04,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577438125] [2023-02-14 22:33:04,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:33:04,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:33:04,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:33:04,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:33:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:33:04,823 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) [2023-02-14 22:33:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:33:04,863 INFO L93 Difference]: Finished difference Result 526 states and 751 transitions. [2023-02-14 22:33:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:33:04,864 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 [2023-02-14 22:33:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:33:04,865 INFO L225 Difference]: With dead ends: 526 [2023-02-14 22:33:04,865 INFO L226 Difference]: Without dead ends: 383 [2023-02-14 22:33:04,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:33:04,867 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 [2023-02-14 22:33:04,867 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] [2023-02-14 22:33:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-14 22:33:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2023-02-14 22:33:04,909 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) [2023-02-14 22:33:04,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 504 transitions. [2023-02-14 22:33:04,913 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 504 transitions. Word has length 52 [2023-02-14 22:33:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:33:04,914 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 504 transitions. [2023-02-14 22:33:04,914 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) [2023-02-14 22:33:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 504 transitions. [2023-02-14 22:33:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 22:33:04,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:33:04,915 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] [2023-02-14 22:33:04,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-14 22:33:04,915 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:33:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:33:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1219185016, now seen corresponding path program 2 times [2023-02-14 22:33:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:33:04,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796445958] [2023-02-14 22:33:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:33:04,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:33:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:33:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:33:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:33:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 22:33:04,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:33:04,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796445958] [2023-02-14 22:33:04,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796445958] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:33:04,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607133728] [2023-02-14 22:33:04,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 22:33:04,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:33:04,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:33:04,995 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) [2023-02-14 22:33:04,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 22:33:05,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 22:33:05,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 22:33:05,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 22:33:05,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:33:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 22:33:05,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:33:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 22:33:05,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607133728] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:33:05,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:33:05,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-02-14 22:33:05,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022839299] [2023-02-14 22:33:05,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:33:05,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 22:33:05,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:33:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 22:33:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:33:05,377 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) [2023-02-14 22:33:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:33:05,505 INFO L93 Difference]: Finished difference Result 471 states and 637 transitions. [2023-02-14 22:33:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:33:05,505 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 [2023-02-14 22:33:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:33:05,506 INFO L225 Difference]: With dead ends: 471 [2023-02-14 22:33:05,507 INFO L226 Difference]: Without dead ends: 365 [2023-02-14 22:33:05,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-02-14 22:33:05,507 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 126 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:33:05,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1310 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:33:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-02-14 22:33:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 358. [2023-02-14 22:33:05,540 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) [2023-02-14 22:33:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 489 transitions. [2023-02-14 22:33:05,542 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 489 transitions. Word has length 52 [2023-02-14 22:33:05,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:33:05,542 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 489 transitions. [2023-02-14 22:33:05,543 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) [2023-02-14 22:33:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 489 transitions. [2023-02-14 22:33:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 22:33:05,544 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:33:05,545 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] [2023-02-14 22:33:05,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 22:33:05,750 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 [2023-02-14 22:33:05,750 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:33:05,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:33:05,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2054713926, now seen corresponding path program 1 times [2023-02-14 22:33:05,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:33:05,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344912429] [2023-02-14 22:33:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:33:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:33:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:06,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:33:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:06,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:33:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:06,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:33:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:33:06,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:33:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344912429] [2023-02-14 22:33:06,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344912429] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:33:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306822452] [2023-02-14 22:33:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:33:06,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:33:06,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:33:06,263 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) [2023-02-14 22:33:06,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 22:33:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:33:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 22:33:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:33:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:33:06,959 INFO L328 TraceCheckSpWp]: Computing backward predicates...