./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/reducercommutativity/sep20-1.i -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 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:22:26,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:22:26,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:22:26,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:22:26,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:22:26,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:22:26,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:22:26,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:22:26,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:22:26,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:22:26,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:22:26,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:22:26,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:22:26,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:22:26,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:22:26,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:22:26,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:22:26,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:22:26,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:22:26,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:22:26,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:22:26,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:22:26,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:22:26,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:22:26,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:22:26,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:22:26,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:22:26,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:22:26,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:22:26,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:22:26,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:22:26,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:22:26,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:22:26,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:22:26,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:22:26,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:22:26,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:22:26,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:22:26,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:22:26,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:22:26,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:22:26,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:22:26,574 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:22:26,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:22:26,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:22:26,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:22:26,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:22:26,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:22:26,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:22:26,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:22:26,578 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:22:26,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:22:26,579 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:22:26,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:22:26,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:22:26,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:22:26,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:22:26,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:22:26,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:22:26,580 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:22:26,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:22:26,581 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:22:26,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:22:26,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:22:26,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:22:26,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:22:26,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:22:26,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:22:26,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:22:26,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:22:26,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:22:26,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:22:26,583 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:22:26,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:22:26,583 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:22:26,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:22:26,584 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:22:26,584 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c [2023-02-15 18:22:26,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:22:26,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:22:26,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:22:26,874 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:22:26,875 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:22:26,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep20-1.i [2023-02-15 18:22:28,058 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:22:28,247 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:22:28,247 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i [2023-02-15 18:22:28,253 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e3a80ee/7f1864ebe53244eb82c6f71875e7a8c3/FLAG69760400b [2023-02-15 18:22:28,264 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e3a80ee/7f1864ebe53244eb82c6f71875e7a8c3 [2023-02-15 18:22:28,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:22:28,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:22:28,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:22:28,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:22:28,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:22:28,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a1e252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28, skipping insertion in model container [2023-02-15 18:22:28,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:22:28,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:22:28,402 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/reducercommutativity/sep20-1.i[1293,1306] [2023-02-15 18:22:28,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:22:28,412 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:22:28,436 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/reducercommutativity/sep20-1.i[1293,1306] [2023-02-15 18:22:28,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:22:28,448 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:22:28,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28 WrapperNode [2023-02-15 18:22:28,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:22:28,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:22:28,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:22:28,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:22:28,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,485 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-15 18:22:28,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:22:28,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:22:28,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:22:28,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:22:28,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,506 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:22:28,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:22:28,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:22:28,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:22:28,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (1/1) ... [2023-02-15 18:22:28,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:22:28,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:28,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 18:22:28,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 18:22:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:22:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:22:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:22:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:22:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:22:28,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:22:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:22:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:22:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-02-15 18:22:28,590 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-02-15 18:22:28,664 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:22:28,666 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:22:28,847 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:22:28,852 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:22:28,853 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 18:22:28,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:22:28 BoogieIcfgContainer [2023-02-15 18:22:28,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:22:28,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:22:28,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:22:28,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:22:28,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:22:28" (1/3) ... [2023-02-15 18:22:28,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43449310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:22:28, skipping insertion in model container [2023-02-15 18:22:28,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:28" (2/3) ... [2023-02-15 18:22:28,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43449310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:22:28, skipping insertion in model container [2023-02-15 18:22:28,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:22:28" (3/3) ... [2023-02-15 18:22:28,866 INFO L112 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2023-02-15 18:22:28,884 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:22:28,884 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:22:28,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:22:28,931 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;@5aa165be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:22:28,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:22:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 18:22:28,942 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:28,943 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] [2023-02-15 18:22:28,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:28,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2023-02-15 18:22:28,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:28,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120713570] [2023-02-15 18:22:28,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:28,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:29,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:22:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:29,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 18:22:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:29,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 18:22:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:22:29,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:29,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120713570] [2023-02-15 18:22:29,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120713570] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:29,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:22:29,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:22:29,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481851128] [2023-02-15 18:22:29,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:29,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:22:29,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:29,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:22:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:22:29,357 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:22:29,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:29,397 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2023-02-15 18:22:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:22:29,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 18:22:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:29,405 INFO L225 Difference]: With dead ends: 52 [2023-02-15 18:22:29,405 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 18:22:29,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:22:29,410 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:29,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 18:22:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-15 18:22:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-15 18:22:29,439 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2023-02-15 18:22:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:29,439 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-15 18:22:29,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:22:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-15 18:22:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 18:22:29,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:29,442 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] [2023-02-15 18:22:29,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 18:22:29,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:29,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2023-02-15 18:22:29,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:29,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908735274] [2023-02-15 18:22:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:29,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 18:22:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:29,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 18:22:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:29,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 18:22:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:22:29,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:29,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908735274] [2023-02-15 18:22:29,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908735274] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:29,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662501647] [2023-02-15 18:22:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:29,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:29,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:29,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:29,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 18:22:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:22:29,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 18:22:29,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:29,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662501647] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:29,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:22:29,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 18:22:29,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580951970] [2023-02-15 18:22:29,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:29,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:22:29,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:29,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:22:29,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:22:29,748 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:29,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:29,764 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-02-15 18:22:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:22:29,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-15 18:22:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:29,766 INFO L225 Difference]: With dead ends: 45 [2023-02-15 18:22:29,766 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 18:22:29,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:22:29,770 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:29,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 18:22:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-15 18:22:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-15 18:22:29,782 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2023-02-15 18:22:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:29,783 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-15 18:22:29,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-15 18:22:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 18:22:29,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:29,784 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:29,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:29,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:29,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:29,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2023-02-15 18:22:29,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:29,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965355543] [2023-02-15 18:22:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:29,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:30,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 18:22:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:30,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 18:22:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:30,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 18:22:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 18:22:30,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:30,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965355543] [2023-02-15 18:22:30,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965355543] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:30,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430426227] [2023-02-15 18:22:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:30,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:30,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:30,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:30,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 18:22:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:30,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:22:30,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 18:22:30,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:30,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430426227] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:30,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:22:30,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-15 18:22:30,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445607204] [2023-02-15 18:22:30,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:30,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:22:30,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:22:30,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:22:30,322 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:30,342 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-02-15 18:22:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:22:30,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-02-15 18:22:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:30,344 INFO L225 Difference]: With dead ends: 41 [2023-02-15 18:22:30,345 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 18:22:30,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:22:30,348 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:30,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 18:22:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-02-15 18:22:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-15 18:22:30,357 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2023-02-15 18:22:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:30,359 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-15 18:22:30,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-15 18:22:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 18:22:30,363 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:30,364 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:30,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:30,569 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,SelfDestructingSolverStorable2 [2023-02-15 18:22:30,570 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:30,570 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2023-02-15 18:22:30,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:30,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583661377] [2023-02-15 18:22:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:30,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:30,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 18:22:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:30,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 18:22:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:30,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 18:22:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:30,691 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:22:30,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583661377] [2023-02-15 18:22:30,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583661377] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240333229] [2023-02-15 18:22:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:30,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:30,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:30,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:30,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 18:22:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:30,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 18:22:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 18:22:30,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 18:22:30,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240333229] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:30,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:30,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-15 18:22:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027107361] [2023-02-15 18:22:30,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:30,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:22:30,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:30,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:22:30,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:22:30,865 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:30,915 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-02-15 18:22:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 18:22:30,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-15 18:22:30,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:30,917 INFO L225 Difference]: With dead ends: 58 [2023-02-15 18:22:30,918 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 18:22:30,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:22:30,919 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:30,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:30,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 18:22:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-02-15 18:22:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-15 18:22:30,929 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2023-02-15 18:22:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:30,929 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-15 18:22:30,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-15 18:22:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 18:22:30,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:30,932 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:30,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:31,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:31,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2023-02-15 18:22:31,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:31,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867690917] [2023-02-15 18:22:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:31,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 18:22:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:31,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 18:22:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:31,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-15 18:22:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-02-15 18:22:31,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:31,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867690917] [2023-02-15 18:22:31,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867690917] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:31,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675631179] [2023-02-15 18:22:31,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:22:31,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:31,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:31,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:31,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 18:22:31,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:22:31,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:31,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:22:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 18:22:31,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 18:22:31,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675631179] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:31,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:31,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-15 18:22:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706210964] [2023-02-15 18:22:31,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 18:22:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 18:22:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:22:31,464 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 18:22:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:31,506 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2023-02-15 18:22:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 18:22:31,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2023-02-15 18:22:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:31,508 INFO L225 Difference]: With dead ends: 74 [2023-02-15 18:22:31,508 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 18:22:31,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:22:31,509 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:31,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 18:22:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-02-15 18:22:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-02-15 18:22:31,515 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2023-02-15 18:22:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:31,515 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-02-15 18:22:31,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 18:22:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-02-15 18:22:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 18:22:31,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:31,517 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:31,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:31,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:31,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:31,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:31,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2023-02-15 18:22:31,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:31,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061255361] [2023-02-15 18:22:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:31,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:31,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 18:22:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:31,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 18:22:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:31,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 18:22:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-15 18:22:31,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:31,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061255361] [2023-02-15 18:22:31,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061255361] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:31,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879562425] [2023-02-15 18:22:31,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:22:31,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:31,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:31,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:31,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 18:22:32,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 18:22:32,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:32,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:22:32,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-15 18:22:32,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-15 18:22:32,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879562425] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:32,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:32,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-15 18:22:32,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115787251] [2023-02-15 18:22:32,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:32,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 18:22:32,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:32,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 18:22:32,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-15 18:22:32,152 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:22:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:32,230 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2023-02-15 18:22:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 18:22:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2023-02-15 18:22:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:32,232 INFO L225 Difference]: With dead ends: 90 [2023-02-15 18:22:32,233 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 18:22:32,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-15 18:22:32,235 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:32,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:22:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 18:22:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-02-15 18:22:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-02-15 18:22:32,243 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2023-02-15 18:22:32,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:32,244 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-02-15 18:22:32,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:22:32,245 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-02-15 18:22:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-15 18:22:32,248 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:32,248 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:32,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:32,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:32,454 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:32,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2023-02-15 18:22:32,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:32,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039717202] [2023-02-15 18:22:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:32,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:32,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 18:22:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:32,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-15 18:22:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:32,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-15 18:22:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-15 18:22:32,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:32,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039717202] [2023-02-15 18:22:32,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039717202] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:32,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360427883] [2023-02-15 18:22:32,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:22:32,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:32,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:32,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:32,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 18:22:32,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:22:32,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:32,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 18:22:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-15 18:22:33,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-15 18:22:33,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360427883] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:33,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:33,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-02-15 18:22:33,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609735132] [2023-02-15 18:22:33,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:33,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 18:22:33,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 18:22:33,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:22:33,230 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:33,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:33,282 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2023-02-15 18:22:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 18:22:33,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2023-02-15 18:22:33,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:33,283 INFO L225 Difference]: With dead ends: 119 [2023-02-15 18:22:33,283 INFO L226 Difference]: Without dead ends: 81 [2023-02-15 18:22:33,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:22:33,285 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:33,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-15 18:22:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-15 18:22:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2023-02-15 18:22:33,302 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 108 [2023-02-15 18:22:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:33,303 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2023-02-15 18:22:33,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2023-02-15 18:22:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-15 18:22:33,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:33,310 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:33,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:33,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:33,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:33,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2004558111, now seen corresponding path program 5 times [2023-02-15 18:22:33,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:33,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452117279] [2023-02-15 18:22:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:33,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:33,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:22:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:33,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 18:22:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:33,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-02-15 18:22:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2023-02-15 18:22:33,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:33,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452117279] [2023-02-15 18:22:33,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452117279] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:33,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432671833] [2023-02-15 18:22:33,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:22:33,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:33,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:33,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:33,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 18:22:35,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-02-15 18:22:35,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:35,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:22:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2023-02-15 18:22:35,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2023-02-15 18:22:35,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432671833] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:35,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:35,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 18:22:35,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7615606] [2023-02-15 18:22:35,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:35,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 18:22:35,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:35,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 18:22:35,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-15 18:22:35,919 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:22:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:35,954 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2023-02-15 18:22:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 18:22:35,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2023-02-15 18:22:35,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:35,956 INFO L225 Difference]: With dead ends: 142 [2023-02-15 18:22:35,956 INFO L226 Difference]: Without dead ends: 105 [2023-02-15 18:22:35,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-15 18:22:35,957 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:35,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 96 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-15 18:22:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-15 18:22:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2023-02-15 18:22:35,964 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 126 [2023-02-15 18:22:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:35,965 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2023-02-15 18:22:35,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:22:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2023-02-15 18:22:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-02-15 18:22:35,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:35,967 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 20, 20, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:35,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 18:22:36,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:36,176 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:36,177 INFO L85 PathProgramCache]: Analyzing trace with hash 848751647, now seen corresponding path program 6 times [2023-02-15 18:22:36,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:36,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26428636] [2023-02-15 18:22:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:36,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:36,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:22:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:36,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-02-15 18:22:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:36,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-02-15 18:22:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1601 trivial. 0 not checked. [2023-02-15 18:22:36,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26428636] [2023-02-15 18:22:36,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26428636] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:36,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887372806] [2023-02-15 18:22:36,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:22:36,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:36,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:36,980 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:36,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 18:22:37,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 18:22:37,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:37,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:22:37,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2023-02-15 18:22:37,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2023-02-15 18:22:37,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887372806] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:37,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:37,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2023-02-15 18:22:37,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722911906] [2023-02-15 18:22:37,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:37,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 18:22:37,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:37,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 18:22:37,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:22:37,189 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:22:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:37,253 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2023-02-15 18:22:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 18:22:37,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 198 [2023-02-15 18:22:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:37,258 INFO L225 Difference]: With dead ends: 179 [2023-02-15 18:22:37,258 INFO L226 Difference]: Without dead ends: 118 [2023-02-15 18:22:37,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:22:37,261 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:37,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 236 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-15 18:22:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-02-15 18:22:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2023-02-15 18:22:37,276 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 198 [2023-02-15 18:22:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:37,276 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2023-02-15 18:22:37,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:22:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2023-02-15 18:22:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-02-15 18:22:37,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:37,279 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:37,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:37,484 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,SelfDestructingSolverStorable8 [2023-02-15 18:22:37,485 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash -217509715, now seen corresponding path program 7 times [2023-02-15 18:22:37,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:37,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507996085] [2023-02-15 18:22:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:37,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:37,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:22:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:38,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 18:22:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:38,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-02-15 18:22:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2023-02-15 18:22:38,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507996085] [2023-02-15 18:22:38,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507996085] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779020143] [2023-02-15 18:22:38,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:22:38,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:38,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:38,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:38,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 18:22:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:38,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 18:22:38,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2023-02-15 18:22:38,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2023-02-15 18:22:38,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779020143] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:38,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:38,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2023-02-15 18:22:38,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363813032] [2023-02-15 18:22:38,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:38,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 18:22:38,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 18:22:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 18:22:38,844 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:22:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:38,892 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2023-02-15 18:22:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 18:22:38,893 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 215 [2023-02-15 18:22:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:38,894 INFO L225 Difference]: With dead ends: 203 [2023-02-15 18:22:38,894 INFO L226 Difference]: Without dead ends: 131 [2023-02-15 18:22:38,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 420 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 18:22:38,895 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:38,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 152 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-15 18:22:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-02-15 18:22:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2023-02-15 18:22:38,902 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 215 [2023-02-15 18:22:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:38,902 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2023-02-15 18:22:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:22:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2023-02-15 18:22:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-02-15 18:22:38,905 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:38,905 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:38,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:39,112 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,SelfDestructingSolverStorable9 [2023-02-15 18:22:39,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2054059049, now seen corresponding path program 8 times [2023-02-15 18:22:39,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:39,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425241451] [2023-02-15 18:22:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:39,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:22:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:39,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 18:22:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:39,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2023-02-15 18:22:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-15 18:22:39,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:39,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425241451] [2023-02-15 18:22:39,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425241451] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:39,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891489123] [2023-02-15 18:22:39,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:22:39,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:39,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:39,569 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:39,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 18:22:39,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:22:39,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:39,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:22:39,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 2490 proven. 36 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2023-02-15 18:22:39,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-15 18:22:39,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891489123] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:39,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:39,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-15 18:22:39,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46310002] [2023-02-15 18:22:39,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:39,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 18:22:39,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 18:22:39,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:22:39,914 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:22:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:39,953 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2023-02-15 18:22:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 18:22:39,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 260 [2023-02-15 18:22:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:39,955 INFO L225 Difference]: With dead ends: 218 [2023-02-15 18:22:39,956 INFO L226 Difference]: Without dead ends: 147 [2023-02-15 18:22:39,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:22:39,957 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:39,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-15 18:22:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-02-15 18:22:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 142 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2023-02-15 18:22:39,963 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 260 [2023-02-15 18:22:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:39,964 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2023-02-15 18:22:39,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:22:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2023-02-15 18:22:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-02-15 18:22:39,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:39,967 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:39,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:40,175 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,SelfDestructingSolverStorable10 [2023-02-15 18:22:40,175 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash -371662137, now seen corresponding path program 9 times [2023-02-15 18:22:40,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:40,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613053840] [2023-02-15 18:22:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:40,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:40,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:22:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:40,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 18:22:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:40,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2023-02-15 18:22:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-15 18:22:40,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:40,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613053840] [2023-02-15 18:22:40,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613053840] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:40,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452386867] [2023-02-15 18:22:40,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:22:40,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:40,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:40,838 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:40,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 18:22:45,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-15 18:22:45,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:45,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 18:22:45,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 2490 proven. 196 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2023-02-15 18:22:45,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2023-02-15 18:22:45,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452386867] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:45,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:45,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-02-15 18:22:45,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236031636] [2023-02-15 18:22:45,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:45,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 18:22:45,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:45,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 18:22:45,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 18:22:45,439 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:22:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:45,490 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2023-02-15 18:22:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 18:22:45,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 276 [2023-02-15 18:22:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:45,491 INFO L225 Difference]: With dead ends: 228 [2023-02-15 18:22:45,492 INFO L226 Difference]: Without dead ends: 157 [2023-02-15 18:22:45,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 542 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 18:22:45,493 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:45,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 72 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:45,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-15 18:22:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-02-15 18:22:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2023-02-15 18:22:45,500 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 276 [2023-02-15 18:22:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:45,501 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2023-02-15 18:22:45,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:22:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2023-02-15 18:22:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-15 18:22:45,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:45,504 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:45,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:45,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 18:22:45,715 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2076360355, now seen corresponding path program 10 times [2023-02-15 18:22:45,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198116928] [2023-02-15 18:22:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:51,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:22:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:52,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 18:22:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:53,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-15 18:22:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 116 proven. 5524 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2023-02-15 18:22:55,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:55,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198116928] [2023-02-15 18:22:55,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198116928] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:55,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632960158] [2023-02-15 18:22:55,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:22:55,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:55,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:55,044 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:22:55,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 18:22:55,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:22:55,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 146 conjunts are in the unsatisfiable core [2023-02-15 18:22:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2023-02-15 18:22:56,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5314 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2023-02-15 18:22:59,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632960158] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:59,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:59,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 30, 31] total 94 [2023-02-15 18:22:59,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119769050] [2023-02-15 18:22:59,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:59,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-02-15 18:22:59,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:59,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-02-15 18:22:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=8452, Unknown=0, NotChecked=0, Total=8742 [2023-02-15 18:22:59,519 INFO L87 Difference]: Start difference. First operand 157 states and 181 transitions. Second operand has 94 states, 92 states have (on average 2.5217391304347827) internal successors, (232), 87 states have internal predecessors, (232), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 18:23:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:06,015 INFO L93 Difference]: Finished difference Result 902 states and 1308 transitions. [2023-02-15 18:23:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-15 18:23:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 2.5217391304347827) internal successors, (232), 87 states have internal predecessors, (232), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 286 [2023-02-15 18:23:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:06,023 INFO L225 Difference]: With dead ends: 902 [2023-02-15 18:23:06,024 INFO L226 Difference]: Without dead ends: 898 [2023-02-15 18:23:06,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 558 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=317, Invalid=8995, Unknown=0, NotChecked=0, Total=9312 [2023-02-15 18:23:06,028 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 192 mSDsluCounter, 6228 mSDsCounter, 0 mSdLazyCounter, 12410 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 6353 SdHoareTripleChecker+Invalid, 12547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 12410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:06,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 6353 Invalid, 12547 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [137 Valid, 12410 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-02-15 18:23:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2023-02-15 18:23:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 584. [2023-02-15 18:23:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 576 states have (on average 1.2864583333333333) internal successors, (741), 577 states have internal predecessors, (741), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 18:23:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 755 transitions. [2023-02-15 18:23:06,136 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 755 transitions. Word has length 286 [2023-02-15 18:23:06,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:06,137 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 755 transitions. [2023-02-15 18:23:06,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 2.5217391304347827) internal successors, (232), 87 states have internal predecessors, (232), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 18:23:06,138 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 755 transitions. [2023-02-15 18:23:06,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-15 18:23:06,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:06,143 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:06,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:06,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 18:23:06,355 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1396301985, now seen corresponding path program 1 times [2023-02-15 18:23:06,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:06,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274105926] [2023-02-15 18:23:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:06,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:12,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:23:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:12,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 18:23:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:12,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-15 18:23:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1244 proven. 3639 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2023-02-15 18:23:14,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:14,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274105926] [2023-02-15 18:23:14,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274105926] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:14,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414476934] [2023-02-15 18:23:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:14,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:14,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:14,201 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:14,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 18:23:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-15 18:23:14,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:14,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 18:23:15,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-02-15 18:23:15,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 18:23:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2491 proven. 1872 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2023-02-15 18:23:17,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2566 proven. 1795 refuted. 0 times theorem prover too weak. 1905 trivial. 0 not checked. [2023-02-15 18:23:20,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414476934] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:20,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:23:20,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 32, 30] total 106 [2023-02-15 18:23:20,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789549908] [2023-02-15 18:23:20,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:20,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-02-15 18:23:20,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:20,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-02-15 18:23:20,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=10746, Unknown=0, NotChecked=0, Total=11130 [2023-02-15 18:23:20,661 INFO L87 Difference]: Start difference. First operand 584 states and 755 transitions. Second operand has 106 states, 104 states have (on average 2.7884615384615383) internal successors, (290), 103 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 18:23:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:37,650 INFO L93 Difference]: Finished difference Result 3097 states and 4235 transitions. [2023-02-15 18:23:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2023-02-15 18:23:37,650 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 104 states have (on average 2.7884615384615383) internal successors, (290), 103 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2023-02-15 18:23:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:37,662 INFO L225 Difference]: With dead ends: 3097 [2023-02-15 18:23:37,662 INFO L226 Difference]: Without dead ends: 2382 [2023-02-15 18:23:37,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 644 SyntacticMatches, 6 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20883 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=2724, Invalid=71532, Unknown=0, NotChecked=0, Total=74256 [2023-02-15 18:23:37,678 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 631 mSDsluCounter, 3927 mSDsCounter, 0 mSdLazyCounter, 9213 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 4023 SdHoareTripleChecker+Invalid, 9304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 9213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:37,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 4023 Invalid, 9304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 9213 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-02-15 18:23:37,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2023-02-15 18:23:37,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1597. [2023-02-15 18:23:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1578 states have (on average 1.3193916349809887) internal successors, (2082), 1581 states have internal predecessors, (2082), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2023-02-15 18:23:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2127 transitions. [2023-02-15 18:23:37,842 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2127 transitions. Word has length 286 [2023-02-15 18:23:37,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:37,843 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 2127 transitions. [2023-02-15 18:23:37,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 104 states have (on average 2.7884615384615383) internal successors, (290), 103 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 18:23:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2127 transitions. [2023-02-15 18:23:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-15 18:23:37,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:37,857 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:37,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:38,065 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,SelfDestructingSolverStorable13 [2023-02-15 18:23:38,066 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:38,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1818194917, now seen corresponding path program 2 times [2023-02-15 18:23:38,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:38,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577809646] [2023-02-15 18:23:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:38,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:49,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:23:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:50,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 18:23:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:50,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-15 18:23:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4372 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2023-02-15 18:23:51,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:51,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577809646] [2023-02-15 18:23:51,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577809646] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:51,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478883592] [2023-02-15 18:23:51,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:23:51,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:51,569 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:51,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 18:23:51,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:23:51,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:51,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 224 conjunts are in the unsatisfiable core [2023-02-15 18:23:51,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:52,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 18:23:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:52,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:52,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:52,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:52,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:52,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:52,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:52,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:52,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:52,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:52,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:52,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:52,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:52,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:52,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:52,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:53,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:53,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:53,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:53,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:53,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:53,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:53,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:53,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:53,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:53,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:53,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:53,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:53,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:53,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:53,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:23:53,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:23:53,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2023-02-15 18:23:53,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 18:23:53,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2023-02-15 18:23:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2545 proven. 3127 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2023-02-15 18:23:55,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:24:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2620 proven. 2651 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2023-02-15 18:24:11,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478883592] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:24:11,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:24:11,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 88, 84] total 175 [2023-02-15 18:24:11,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106367418] [2023-02-15 18:24:11,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:24:11,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2023-02-15 18:24:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:24:11,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2023-02-15 18:24:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=29703, Unknown=0, NotChecked=0, Total=30450 [2023-02-15 18:24:11,789 INFO L87 Difference]: Start difference. First operand 1597 states and 2127 transitions. Second operand has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 18:24:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:24:36,957 INFO L93 Difference]: Finished difference Result 7082 states and 9772 transitions. [2023-02-15 18:24:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-02-15 18:24:36,961 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2023-02-15 18:24:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:24:36,986 INFO L225 Difference]: With dead ends: 7082 [2023-02-15 18:24:36,986 INFO L226 Difference]: Without dead ends: 5027 [2023-02-15 18:24:36,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 504 SyntacticMatches, 35 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13662 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=2094, Invalid=45648, Unknown=0, NotChecked=0, Total=47742 [2023-02-15 18:24:36,998 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 374 mSDsluCounter, 12430 mSDsCounter, 0 mSdLazyCounter, 26476 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 12569 SdHoareTripleChecker+Invalid, 26588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 26476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2023-02-15 18:24:36,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 12569 Invalid, 26588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [112 Valid, 26476 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2023-02-15 18:24:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2023-02-15 18:24:37,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 3257. [2023-02-15 18:24:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3220 states have (on average 1.3217391304347825) internal successors, (4256), 3226 states have internal predecessors, (4256), 19 states have call successors, (19), 11 states have call predecessors, (19), 17 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2023-02-15 18:24:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4366 transitions. [2023-02-15 18:24:37,328 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4366 transitions. Word has length 286 [2023-02-15 18:24:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:24:37,329 INFO L495 AbstractCegarLoop]: Abstraction has 3257 states and 4366 transitions. [2023-02-15 18:24:37,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 18:24:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4366 transitions. [2023-02-15 18:24:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-15 18:24:37,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:24:37,355 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:24:37,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 18:24:37,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:24:37,563 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:24:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:24:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash 938743263, now seen corresponding path program 3 times [2023-02-15 18:24:37,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:24:37,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010677416] [2023-02-15 18:24:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:24:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:24:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:47,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:24:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:48,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-02-15 18:24:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:48,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-15 18:24:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4374 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2023-02-15 18:24:49,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:24:49,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010677416] [2023-02-15 18:24:49,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010677416] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:24:49,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878993956] [2023-02-15 18:24:49,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:24:49,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:24:49,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:24:49,269 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:24:49,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 18:25:03,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2023-02-15 18:25:03,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:25:03,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 195 conjunts are in the unsatisfiable core [2023-02-15 18:25:03,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:25:04,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 18:25:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:25:04,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-02-15 18:25:04,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 18:25:04,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 18:25:04,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 18:25:04,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 18:25:04,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 18:25:04,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 18:25:04,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 18:25:04,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2023-02-15 18:25:04,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2023-02-15 18:25:04,904 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 18:25:04,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2023-02-15 18:25:05,118 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 18:25:05,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2023-02-15 18:25:05,242 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 18:25:05,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2023-02-15 18:25:05,282 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 18:25:05,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2023-02-15 18:25:05,396 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 18:25:05,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2023-02-15 18:25:05,513 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 18:25:05,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2023-02-15 18:25:05,626 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-02-15 18:25:05,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2023-02-15 18:25:05,866 INFO L321 Elim1Store]: treesize reduction 36, result has 41.9 percent of original size [2023-02-15 18:25:05,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 77 treesize of output 84 [2023-02-15 18:25:06,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:25:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:25:06,226 INFO L321 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2023-02-15 18:25:06,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 127 treesize of output 110 [2023-02-15 18:25:06,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2023-02-15 18:25:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2456 proven. 2785 refuted. 1 times theorem prover too weak. 1024 trivial. 0 not checked. [2023-02-15 18:25:10,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:25:10,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878993956] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:25:10,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:25:10,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 65] total 115 [2023-02-15 18:25:10,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46883281] [2023-02-15 18:25:10,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:25:10,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-02-15 18:25:10,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:25:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-02-15 18:25:10,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=12767, Unknown=3, NotChecked=0, Total=13340 [2023-02-15 18:25:10,804 INFO L87 Difference]: Start difference. First operand 3257 states and 4366 transitions. Second operand has 115 states, 115 states have (on average 2.2869565217391306) internal successors, (263), 114 states have internal predecessors, (263), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)