./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/eca-rers2012/Problem12_label10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af34cca1265ebda4ef436604d1992244d07816396f61d2a729ccbfca2d3a784e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:24:29,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:24:29,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:24:29,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:24:29,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:24:29,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:24:29,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:24:29,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:24:29,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:24:29,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:24:29,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:24:29,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:24:29,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:24:29,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:24:29,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:24:29,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:24:29,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:24:29,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:24:29,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:24:29,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:24:29,442 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:24:29,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:24:29,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:24:29,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:24:29,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:24:29,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:24:29,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:24:29,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:24:29,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:24:29,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:24:29,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:24:29,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:24:29,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:24:29,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:24:29,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:24:29,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:24:29,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:24:29,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:24:29,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:24:29,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:24:29,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:24:29,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:24:29,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:24:29,479 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:24:29,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:24:29,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:24:29,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:24:29,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:24:29,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:24:29,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:24:29,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:24:29,485 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:24:29,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:24:29,486 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:24:29,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:24:29,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:24:29,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:24:29,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:24:29,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:24:29,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:24:29,487 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:24:29,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:24:29,488 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:24:29,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:24:29,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:24:29,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:24:29,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:24:29,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:24:29,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:24:29,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:24:29,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:24:29,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:24:29,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:24:29,490 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:24:29,490 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:24:29,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:24:29,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af34cca1265ebda4ef436604d1992244d07816396f61d2a729ccbfca2d3a784e [2022-07-22 12:24:29,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:24:29,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:24:29,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:24:29,694 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:24:29,695 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:24:29,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label10.c [2022-07-22 12:24:29,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/264433830/3911f210297a44798adf0f51fb7d9dd9/FLAGdfab5426d [2022-07-22 12:24:30,247 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:24:30,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label10.c [2022-07-22 12:24:30,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/264433830/3911f210297a44798adf0f51fb7d9dd9/FLAGdfab5426d [2022-07-22 12:24:30,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/264433830/3911f210297a44798adf0f51fb7d9dd9 [2022-07-22 12:24:30,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:24:30,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:24:30,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:24:30,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:24:30,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:24:30,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:24:30" (1/1) ... [2022-07-22 12:24:30,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1f4883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:30, skipping insertion in model container [2022-07-22 12:24:30,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:24:30" (1/1) ... [2022-07-22 12:24:30,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:24:30,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:24:31,105 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label10.c[3658,3671] [2022-07-22 12:24:31,653 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:24:31,659 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:24:31,678 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label10.c[3658,3671] [2022-07-22 12:24:31,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:24:31,974 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:24:31,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31 WrapperNode [2022-07-22 12:24:31,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:24:31,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:24:31,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:24:31,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:24:31,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (1/1) ... [2022-07-22 12:24:32,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (1/1) ... [2022-07-22 12:24:32,235 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-22 12:24:32,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:24:32,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:24:32,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:24:32,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:24:32,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (1/1) ... [2022-07-22 12:24:32,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (1/1) ... [2022-07-22 12:24:32,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (1/1) ... [2022-07-22 12:24:32,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (1/1) ... [2022-07-22 12:24:32,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (1/1) ... [2022-07-22 12:24:32,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (1/1) ... [2022-07-22 12:24:32,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (1/1) ... [2022-07-22 12:24:32,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:24:32,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:24:32,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:24:32,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:24:32,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (1/1) ... [2022-07-22 12:24:32,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:24:32,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:24:32,684 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) [2022-07-22 12:24:32,739 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 [2022-07-22 12:24:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:24:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:24:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:24:32,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:24:32,818 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:24:32,819 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:24:35,442 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:24:35,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:24:35,455 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:24:35,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:24:35 BoogieIcfgContainer [2022-07-22 12:24:35,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:24:35,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:24:35,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:24:35,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:24:35,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:24:30" (1/3) ... [2022-07-22 12:24:35,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65044d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:24:35, skipping insertion in model container [2022-07-22 12:24:35,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:24:31" (2/3) ... [2022-07-22 12:24:35,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65044d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:24:35, skipping insertion in model container [2022-07-22 12:24:35,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:24:35" (3/3) ... [2022-07-22 12:24:35,463 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label10.c [2022-07-22 12:24:35,472 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:24:35,472 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:24:35,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:24:35,517 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@63b0fa9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41e75e7b [2022-07-22 12:24:35,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:24:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 12:24:35,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:24:35,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:24:35,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:24:35,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:24:35,532 INFO L85 PathProgramCache]: Analyzing trace with hash -438767135, now seen corresponding path program 1 times [2022-07-22 12:24:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:24:35,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052956084] [2022-07-22 12:24:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:24:35,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:24:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:24:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:24:35,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:24:35,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052956084] [2022-07-22 12:24:35,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052956084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:24:35,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:24:35,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:24:35,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634939640] [2022-07-22 12:24:35,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:24:35,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:24:35,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:24:35,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:24:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:24:35,680 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:24:38,428 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-07-22 12:24:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:24:38,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 12:24:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:24:38,444 INFO L225 Difference]: With dead ends: 2388 [2022-07-22 12:24:38,445 INFO L226 Difference]: Without dead ends: 1506 [2022-07-22 12:24:38,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:24:38,461 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 870 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:24:38,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 156 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:24:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-22 12:24:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-22 12:24:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.8458471760797341) internal successors, (2778), 1505 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2778 transitions. [2022-07-22 12:24:38,546 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2778 transitions. Word has length 27 [2022-07-22 12:24:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:24:38,547 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2778 transitions. [2022-07-22 12:24:38,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2778 transitions. [2022-07-22 12:24:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-22 12:24:38,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:24:38,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:24:38,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:24:38,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:24:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:24:38,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1051202546, now seen corresponding path program 1 times [2022-07-22 12:24:38,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:24:38,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87962221] [2022-07-22 12:24:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:24:38,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:24:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:24:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:24:38,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:24:38,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87962221] [2022-07-22 12:24:38,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87962221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:24:38,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:24:38,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:24:38,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835614848] [2022-07-22 12:24:38,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:24:38,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:24:38,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:24:38,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:24:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:24:38,638 INFO L87 Difference]: Start difference. First operand 1506 states and 2778 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:24:41,076 INFO L93 Difference]: Finished difference Result 3761 states and 6893 transitions. [2022-07-22 12:24:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:24:41,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-07-22 12:24:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:24:41,083 INFO L225 Difference]: With dead ends: 3761 [2022-07-22 12:24:41,084 INFO L226 Difference]: Without dead ends: 2257 [2022-07-22 12:24:41,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:24:41,086 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:24:41,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 448 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:24:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2022-07-22 12:24:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2022-07-22 12:24:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4419326241134751) internal successors, (3253), 2256 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3253 transitions. [2022-07-22 12:24:41,134 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3253 transitions. Word has length 96 [2022-07-22 12:24:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:24:41,135 INFO L495 AbstractCegarLoop]: Abstraction has 2257 states and 3253 transitions. [2022-07-22 12:24:41,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3253 transitions. [2022-07-22 12:24:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-22 12:24:41,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:24:41,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:24:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:24:41,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:24:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:24:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2087433101, now seen corresponding path program 1 times [2022-07-22 12:24:41,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:24:41,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230428282] [2022-07-22 12:24:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:24:41,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:24:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:24:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:24:41,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:24:41,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230428282] [2022-07-22 12:24:41,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230428282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:24:41,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:24:41,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:24:41,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565343561] [2022-07-22 12:24:41,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:24:41,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:24:41,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:24:41,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:24:41,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:24:41,248 INFO L87 Difference]: Start difference. First operand 2257 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:24:43,911 INFO L93 Difference]: Finished difference Result 6765 states and 9754 transitions. [2022-07-22 12:24:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:24:43,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-07-22 12:24:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:24:43,923 INFO L225 Difference]: With dead ends: 6765 [2022-07-22 12:24:43,923 INFO L226 Difference]: Without dead ends: 4510 [2022-07-22 12:24:43,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:24:43,926 INFO L413 NwaCegarLoop]: 1370 mSDtfsCounter, 729 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:24:43,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1378 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:24:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2022-07-22 12:24:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2022-07-22 12:24:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.3714792636948325) internal successors, (6184), 4509 states have internal predecessors, (6184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:43,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6184 transitions. [2022-07-22 12:24:43,979 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6184 transitions. Word has length 98 [2022-07-22 12:24:43,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:24:43,980 INFO L495 AbstractCegarLoop]: Abstraction has 4510 states and 6184 transitions. [2022-07-22 12:24:43,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6184 transitions. [2022-07-22 12:24:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-22 12:24:43,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:24:43,981 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:24:43,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:24:43,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:24:43,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:24:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash -271321694, now seen corresponding path program 1 times [2022-07-22 12:24:43,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:24:43,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683055490] [2022-07-22 12:24:43,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:24:43,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:24:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:24:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:24:44,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:24:44,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683055490] [2022-07-22 12:24:44,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683055490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:24:44,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:24:44,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:24:44,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654529262] [2022-07-22 12:24:44,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:24:44,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:24:44,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:24:44,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:24:44,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:24:44,078 INFO L87 Difference]: Start difference. First operand 4510 states and 6184 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:24:47,868 INFO L93 Difference]: Finished difference Result 9769 states and 13273 transitions. [2022-07-22 12:24:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:24:47,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-07-22 12:24:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:24:47,889 INFO L225 Difference]: With dead ends: 9769 [2022-07-22 12:24:47,889 INFO L226 Difference]: Without dead ends: 5261 [2022-07-22 12:24:47,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:24:47,900 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 2182 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 5487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:24:47,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2182 Valid, 240 Invalid, 5487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-22 12:24:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2022-07-22 12:24:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2022-07-22 12:24:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.2979087452471483) internal successors, (6827), 5260 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6827 transitions. [2022-07-22 12:24:47,966 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6827 transitions. Word has length 104 [2022-07-22 12:24:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:24:47,968 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 6827 transitions. [2022-07-22 12:24:47,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6827 transitions. [2022-07-22 12:24:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-22 12:24:47,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:24:47,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:24:47,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:24:47,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:24:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:24:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash -882153392, now seen corresponding path program 1 times [2022-07-22 12:24:47,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:24:47,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995883528] [2022-07-22 12:24:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:24:47,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:24:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:24:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:24:48,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:24:48,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995883528] [2022-07-22 12:24:48,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995883528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:24:48,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:24:48,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:24:48,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379514929] [2022-07-22 12:24:48,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:24:48,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:24:48,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:24:48,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:24:48,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:24:48,116 INFO L87 Difference]: Start difference. First operand 5261 states and 6827 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:24:51,270 INFO L93 Difference]: Finished difference Result 12810 states and 17221 transitions. [2022-07-22 12:24:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:24:51,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2022-07-22 12:24:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:24:51,290 INFO L225 Difference]: With dead ends: 12810 [2022-07-22 12:24:51,290 INFO L226 Difference]: Without dead ends: 8265 [2022-07-22 12:24:51,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:24:51,296 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3680 mSolverCounterSat, 658 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 4338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 658 IncrementalHoareTripleChecker+Valid, 3680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:24:51,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 616 Invalid, 4338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [658 Valid, 3680 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-22 12:24:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2022-07-22 12:24:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 7514. [2022-07-22 12:24:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 1.213097298016771) internal successors, (9114), 7513 states have internal predecessors, (9114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 9114 transitions. [2022-07-22 12:24:51,389 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 9114 transitions. Word has length 175 [2022-07-22 12:24:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:24:51,390 INFO L495 AbstractCegarLoop]: Abstraction has 7514 states and 9114 transitions. [2022-07-22 12:24:51,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 9114 transitions. [2022-07-22 12:24:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-07-22 12:24:51,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:24:51,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:24:51,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:24:51,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:24:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:24:51,393 INFO L85 PathProgramCache]: Analyzing trace with hash -52205525, now seen corresponding path program 1 times [2022-07-22 12:24:51,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:24:51,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572508410] [2022-07-22 12:24:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:24:51,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:24:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:24:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-22 12:24:51,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:24:51,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572508410] [2022-07-22 12:24:51,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572508410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:24:51,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:24:51,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:24:51,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701010800] [2022-07-22 12:24:51,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:24:51,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:24:51,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:24:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:24:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:24:51,515 INFO L87 Difference]: Start difference. First operand 7514 states and 9114 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:24:53,978 INFO L93 Difference]: Finished difference Result 18783 states and 23429 transitions. [2022-07-22 12:24:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:24:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2022-07-22 12:24:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:24:54,012 INFO L225 Difference]: With dead ends: 18783 [2022-07-22 12:24:54,013 INFO L226 Difference]: Without dead ends: 12022 [2022-07-22 12:24:54,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:24:54,019 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:24:54,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 312 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:24:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12022 states. [2022-07-22 12:24:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12022 to 11269. [2022-07-22 12:24:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 1.1975505857294995) internal successors, (13494), 11268 states have internal predecessors, (13494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13494 transitions. [2022-07-22 12:24:54,175 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13494 transitions. Word has length 249 [2022-07-22 12:24:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:24:54,176 INFO L495 AbstractCegarLoop]: Abstraction has 11269 states and 13494 transitions. [2022-07-22 12:24:54,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13494 transitions. [2022-07-22 12:24:54,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-07-22 12:24:54,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:24:54,180 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:24:54,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:24:54,181 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:24:54,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:24:54,181 INFO L85 PathProgramCache]: Analyzing trace with hash -769657463, now seen corresponding path program 1 times [2022-07-22 12:24:54,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:24:54,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445325255] [2022-07-22 12:24:54,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:24:54,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:24:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:24:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 12:24:54,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:24:54,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445325255] [2022-07-22 12:24:54,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445325255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:24:54,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:24:54,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:24:54,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764121417] [2022-07-22 12:24:54,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:24:54,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:24:54,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:24:54,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:24:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:24:54,364 INFO L87 Difference]: Start difference. First operand 11269 states and 13494 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:24:56,858 INFO L93 Difference]: Finished difference Result 26291 states and 32289 transitions. [2022-07-22 12:24:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:24:56,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 316 [2022-07-22 12:24:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:24:56,900 INFO L225 Difference]: With dead ends: 26291 [2022-07-22 12:24:56,901 INFO L226 Difference]: Without dead ends: 15775 [2022-07-22 12:24:56,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:24:56,914 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 829 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1005 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1005 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:24:56,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 142 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1005 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:24:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15775 states. [2022-07-22 12:24:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15775 to 15775. [2022-07-22 12:24:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2147838214783822) internal successors, (19162), 15774 states have internal predecessors, (19162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19162 transitions. [2022-07-22 12:24:57,250 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19162 transitions. Word has length 316 [2022-07-22 12:24:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:24:57,251 INFO L495 AbstractCegarLoop]: Abstraction has 15775 states and 19162 transitions. [2022-07-22 12:24:57,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19162 transitions. [2022-07-22 12:24:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-07-22 12:24:57,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:24:57,255 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:24:57,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:24:57,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:24:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:24:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2137202274, now seen corresponding path program 1 times [2022-07-22 12:24:57,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:24:57,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595283474] [2022-07-22 12:24:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:24:57,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:24:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:24:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 74 proven. 108 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-22 12:24:57,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:24:57,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595283474] [2022-07-22 12:24:57,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595283474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:24:57,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792436213] [2022-07-22 12:24:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:24:57,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:24:57,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:24:57,378 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) [2022-07-22 12:24:57,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:24:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:24:57,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:24:57,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:24:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 12:24:57,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:24:57,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792436213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:24:57,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:24:57,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-22 12:24:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234453731] [2022-07-22 12:24:57,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:24:57,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:24:57,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:24:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:24:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:24:57,636 INFO L87 Difference]: Start difference. First operand 15775 states and 19162 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:24:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:24:59,740 INFO L93 Difference]: Finished difference Result 34552 states and 42441 transitions. [2022-07-22 12:24:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:24:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2022-07-22 12:24:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:24:59,773 INFO L225 Difference]: With dead ends: 34552 [2022-07-22 12:24:59,773 INFO L226 Difference]: Without dead ends: 19530 [2022-07-22 12:24:59,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:24:59,788 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 763 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:24:59,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 238 Invalid, 2782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 12:24:59,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19530 states. [2022-07-22 12:24:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19530 to 19530. [2022-07-22 12:24:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19530 states, 19529 states have (on average 1.2128629218085925) internal successors, (23686), 19529 states have internal predecessors, (23686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19530 states to 19530 states and 23686 transitions. [2022-07-22 12:25:00,120 INFO L78 Accepts]: Start accepts. Automaton has 19530 states and 23686 transitions. Word has length 345 [2022-07-22 12:25:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:00,121 INFO L495 AbstractCegarLoop]: Abstraction has 19530 states and 23686 transitions. [2022-07-22 12:25:00,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 19530 states and 23686 transitions. [2022-07-22 12:25:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-07-22 12:25:00,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:00,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:00,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 12:25:00,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:25:00,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:00,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1315212118, now seen corresponding path program 1 times [2022-07-22 12:25:00,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:00,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504325634] [2022-07-22 12:25:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:00,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 12:25:00,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504325634] [2022-07-22 12:25:00,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504325634] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:00,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:00,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:25:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593322682] [2022-07-22 12:25:00,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:00,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:00,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:00,561 INFO L87 Difference]: Start difference. First operand 19530 states and 23686 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:03,358 INFO L93 Difference]: Finished difference Result 48070 states and 58712 transitions. [2022-07-22 12:25:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:03,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 354 [2022-07-22 12:25:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:03,443 INFO L225 Difference]: With dead ends: 48070 [2022-07-22 12:25:03,444 INFO L226 Difference]: Without dead ends: 29293 [2022-07-22 12:25:03,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:03,473 INFO L413 NwaCegarLoop]: 1239 mSDtfsCounter, 636 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:03,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 1246 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:25:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29293 states. [2022-07-22 12:25:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29293 to 28542. [2022-07-22 12:25:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28542 states, 28541 states have (on average 1.2074559405767142) internal successors, (34462), 28541 states have internal predecessors, (34462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28542 states to 28542 states and 34462 transitions. [2022-07-22 12:25:03,807 INFO L78 Accepts]: Start accepts. Automaton has 28542 states and 34462 transitions. Word has length 354 [2022-07-22 12:25:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:03,808 INFO L495 AbstractCegarLoop]: Abstraction has 28542 states and 34462 transitions. [2022-07-22 12:25:03,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28542 states and 34462 transitions. [2022-07-22 12:25:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-07-22 12:25:03,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:03,812 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:03,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:25:03,813 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash -959516428, now seen corresponding path program 1 times [2022-07-22 12:25:03,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:03,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586587451] [2022-07-22 12:25:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:03,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-22 12:25:04,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:04,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586587451] [2022-07-22 12:25:04,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586587451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:04,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:04,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:25:04,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739580737] [2022-07-22 12:25:04,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:04,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:04,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:04,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:04,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:04,010 INFO L87 Difference]: Start difference. First operand 28542 states and 34462 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:06,648 INFO L93 Difference]: Finished difference Result 57082 states and 68925 transitions. [2022-07-22 12:25:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:06,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 358 [2022-07-22 12:25:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:06,691 INFO L225 Difference]: With dead ends: 57082 [2022-07-22 12:25:06,692 INFO L226 Difference]: Without dead ends: 29293 [2022-07-22 12:25:06,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:06,716 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 752 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:06,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 367 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 2510 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:25:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29293 states. [2022-07-22 12:25:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29293 to 27791. [2022-07-22 12:25:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27791 states, 27790 states have (on average 1.1928031666066932) internal successors, (33148), 27790 states have internal predecessors, (33148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27791 states to 27791 states and 33148 transitions. [2022-07-22 12:25:07,167 INFO L78 Accepts]: Start accepts. Automaton has 27791 states and 33148 transitions. Word has length 358 [2022-07-22 12:25:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:07,167 INFO L495 AbstractCegarLoop]: Abstraction has 27791 states and 33148 transitions. [2022-07-22 12:25:07,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 27791 states and 33148 transitions. [2022-07-22 12:25:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-07-22 12:25:07,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:07,191 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:07,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 12:25:07,191 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1863064843, now seen corresponding path program 1 times [2022-07-22 12:25:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:07,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83049633] [2022-07-22 12:25:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-22 12:25:07,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:07,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83049633] [2022-07-22 12:25:07,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83049633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:07,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:07,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:25:07,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73822436] [2022-07-22 12:25:07,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:07,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:07,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:07,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:07,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:07,309 INFO L87 Difference]: Start difference. First operand 27791 states and 33148 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:09,965 INFO L93 Difference]: Finished difference Result 75857 states and 91606 transitions. [2022-07-22 12:25:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 413 [2022-07-22 12:25:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:10,021 INFO L225 Difference]: With dead ends: 75857 [2022-07-22 12:25:10,021 INFO L226 Difference]: Without dead ends: 48819 [2022-07-22 12:25:10,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:10,048 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 703 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:10,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 529 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:25:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48819 states. [2022-07-22 12:25:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48819 to 47317. [2022-07-22 12:25:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47317 states, 47316 states have (on average 1.1756910981486177) internal successors, (55629), 47316 states have internal predecessors, (55629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47317 states to 47317 states and 55629 transitions. [2022-07-22 12:25:10,448 INFO L78 Accepts]: Start accepts. Automaton has 47317 states and 55629 transitions. Word has length 413 [2022-07-22 12:25:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:10,449 INFO L495 AbstractCegarLoop]: Abstraction has 47317 states and 55629 transitions. [2022-07-22 12:25:10,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 47317 states and 55629 transitions. [2022-07-22 12:25:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-07-22 12:25:10,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:10,460 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:10,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 12:25:10,460 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:10,461 INFO L85 PathProgramCache]: Analyzing trace with hash 932015733, now seen corresponding path program 1 times [2022-07-22 12:25:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:10,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078399534] [2022-07-22 12:25:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:10,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 12:25:10,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:10,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078399534] [2022-07-22 12:25:10,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078399534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:10,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:10,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:25:10,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922048713] [2022-07-22 12:25:10,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:10,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:10,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:10,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:10,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:10,609 INFO L87 Difference]: Start difference. First operand 47317 states and 55629 transitions. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:13,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:13,483 INFO L93 Difference]: Finished difference Result 134435 states and 158813 transitions. [2022-07-22 12:25:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:13,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 512 [2022-07-22 12:25:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:13,593 INFO L225 Difference]: With dead ends: 134435 [2022-07-22 12:25:13,593 INFO L226 Difference]: Without dead ends: 87871 [2022-07-22 12:25:13,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:13,638 INFO L413 NwaCegarLoop]: 1255 mSDtfsCounter, 560 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:13,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1262 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:25:13,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87871 states. [2022-07-22 12:25:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87871 to 84116. [2022-07-22 12:25:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84116 states, 84115 states have (on average 1.131736313380491) internal successors, (95196), 84115 states have internal predecessors, (95196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84116 states to 84116 states and 95196 transitions. [2022-07-22 12:25:14,584 INFO L78 Accepts]: Start accepts. Automaton has 84116 states and 95196 transitions. Word has length 512 [2022-07-22 12:25:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:14,584 INFO L495 AbstractCegarLoop]: Abstraction has 84116 states and 95196 transitions. [2022-07-22 12:25:14,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 84116 states and 95196 transitions. [2022-07-22 12:25:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-22 12:25:14,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:14,597 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:14,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 12:25:14,597 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:14,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1498649070, now seen corresponding path program 1 times [2022-07-22 12:25:14,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:14,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867127660] [2022-07-22 12:25:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:14,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2022-07-22 12:25:14,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:14,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867127660] [2022-07-22 12:25:14,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867127660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:14,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:14,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:25:14,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397673943] [2022-07-22 12:25:14,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:14,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:14,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:14,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:14,720 INFO L87 Difference]: Start difference. First operand 84116 states and 95196 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:17,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:17,500 INFO L93 Difference]: Finished difference Result 186254 states and 210762 transitions. [2022-07-22 12:25:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:17,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 513 [2022-07-22 12:25:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:17,680 INFO L225 Difference]: With dead ends: 186254 [2022-07-22 12:25:17,681 INFO L226 Difference]: Without dead ends: 102891 [2022-07-22 12:25:17,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:17,719 INFO L413 NwaCegarLoop]: 1109 mSDtfsCounter, 847 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:17,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1117 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 12:25:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102891 states. [2022-07-22 12:25:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102891 to 102891. [2022-07-22 12:25:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102891 states, 102890 states have (on average 1.118825930605501) internal successors, (115116), 102890 states have internal predecessors, (115116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102891 states to 102891 states and 115116 transitions. [2022-07-22 12:25:19,030 INFO L78 Accepts]: Start accepts. Automaton has 102891 states and 115116 transitions. Word has length 513 [2022-07-22 12:25:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:19,030 INFO L495 AbstractCegarLoop]: Abstraction has 102891 states and 115116 transitions. [2022-07-22 12:25:19,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 102891 states and 115116 transitions. [2022-07-22 12:25:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2022-07-22 12:25:19,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:19,053 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:19,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:25:19,054 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:19,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash 112580126, now seen corresponding path program 1 times [2022-07-22 12:25:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:19,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230926826] [2022-07-22 12:25:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:19,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-22 12:25:19,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:19,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230926826] [2022-07-22 12:25:19,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230926826] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:19,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:19,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:25:19,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331826337] [2022-07-22 12:25:19,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:19,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:19,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:19,312 INFO L87 Difference]: Start difference. First operand 102891 states and 115116 transitions. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:22,497 INFO L93 Difference]: Finished difference Result 248587 states and 280527 transitions. [2022-07-22 12:25:22,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 569 [2022-07-22 12:25:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:22,700 INFO L225 Difference]: With dead ends: 248587 [2022-07-22 12:25:22,701 INFO L226 Difference]: Without dead ends: 141192 [2022-07-22 12:25:22,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:22,765 INFO L413 NwaCegarLoop]: 1292 mSDtfsCounter, 585 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:22,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1300 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2224 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:25:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141192 states. [2022-07-22 12:25:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141192 to 138939. [2022-07-22 12:25:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138939 states, 138938 states have (on average 1.1025349436439276) internal successors, (153184), 138938 states have internal predecessors, (153184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138939 states to 138939 states and 153184 transitions. [2022-07-22 12:25:24,778 INFO L78 Accepts]: Start accepts. Automaton has 138939 states and 153184 transitions. Word has length 569 [2022-07-22 12:25:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:24,778 INFO L495 AbstractCegarLoop]: Abstraction has 138939 states and 153184 transitions. [2022-07-22 12:25:24,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 138939 states and 153184 transitions. [2022-07-22 12:25:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-07-22 12:25:24,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:24,799 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:24,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:25:24,800 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:24,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1411609590, now seen corresponding path program 1 times [2022-07-22 12:25:24,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:24,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612020767] [2022-07-22 12:25:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:24,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 636 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-22 12:25:24,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:24,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612020767] [2022-07-22 12:25:24,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612020767] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:24,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:24,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:25:24,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853145845] [2022-07-22 12:25:24,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:24,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:24,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:24,948 INFO L87 Difference]: Start difference. First operand 138939 states and 153184 transitions. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:28,530 INFO L93 Difference]: Finished difference Result 317679 states and 350381 transitions. [2022-07-22 12:25:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 651 [2022-07-22 12:25:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:28,872 INFO L225 Difference]: With dead ends: 317679 [2022-07-22 12:25:28,873 INFO L226 Difference]: Without dead ends: 179493 [2022-07-22 12:25:28,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:28,991 INFO L413 NwaCegarLoop]: 1278 mSDtfsCounter, 664 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:28,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 1285 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:25:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179493 states. [2022-07-22 12:25:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179493 to 174236. [2022-07-22 12:25:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174236 states, 174235 states have (on average 1.0865153384796395) internal successors, (189309), 174235 states have internal predecessors, (189309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174236 states to 174236 states and 189309 transitions. [2022-07-22 12:25:31,259 INFO L78 Accepts]: Start accepts. Automaton has 174236 states and 189309 transitions. Word has length 651 [2022-07-22 12:25:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:31,260 INFO L495 AbstractCegarLoop]: Abstraction has 174236 states and 189309 transitions. [2022-07-22 12:25:31,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:31,260 INFO L276 IsEmpty]: Start isEmpty. Operand 174236 states and 189309 transitions. [2022-07-22 12:25:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-07-22 12:25:31,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:31,281 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:31,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 12:25:31,281 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:31,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1505451958, now seen corresponding path program 1 times [2022-07-22 12:25:31,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:31,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524817355] [2022-07-22 12:25:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:31,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 628 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-07-22 12:25:32,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:32,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524817355] [2022-07-22 12:25:32,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524817355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:32,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:32,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:25:32,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777793165] [2022-07-22 12:25:32,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:32,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:32,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:32,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:32,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:32,008 INFO L87 Difference]: Start difference. First operand 174236 states and 189309 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:35,505 INFO L93 Difference]: Finished difference Result 347719 states and 377860 transitions. [2022-07-22 12:25:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:35,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 651 [2022-07-22 12:25:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:35,734 INFO L225 Difference]: With dead ends: 347719 [2022-07-22 12:25:35,734 INFO L226 Difference]: Without dead ends: 174236 [2022-07-22 12:25:35,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:25:35,799 INFO L413 NwaCegarLoop]: 1262 mSDtfsCounter, 669 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:35,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1270 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:25:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174236 states. [2022-07-22 12:25:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174236 to 171232. [2022-07-22 12:25:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171232 states, 171231 states have (on average 1.0682469879869883) internal successors, (182917), 171231 states have internal predecessors, (182917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171232 states to 171232 states and 182917 transitions. [2022-07-22 12:25:38,447 INFO L78 Accepts]: Start accepts. Automaton has 171232 states and 182917 transitions. Word has length 651 [2022-07-22 12:25:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:38,447 INFO L495 AbstractCegarLoop]: Abstraction has 171232 states and 182917 transitions. [2022-07-22 12:25:38,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 171232 states and 182917 transitions. [2022-07-22 12:25:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 710 [2022-07-22 12:25:38,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:38,468 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:38,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 12:25:38,469 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2099495311, now seen corresponding path program 1 times [2022-07-22 12:25:38,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:38,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77509683] [2022-07-22 12:25:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:38,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 339 proven. 416 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-22 12:25:38,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:38,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77509683] [2022-07-22 12:25:38,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77509683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:25:38,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465431191] [2022-07-22 12:25:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:38,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:25:38,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:25:38,744 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) [2022-07-22 12:25:38,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:25:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:38,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:25:38,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:25:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-07-22 12:25:39,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:25:39,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465431191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:39,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:25:39,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 12:25:39,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684178547] [2022-07-22 12:25:39,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:39,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:39,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:39,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:39,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:25:39,572 INFO L87 Difference]: Start difference. First operand 171232 states and 182917 transitions. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:42,959 INFO L93 Difference]: Finished difference Result 343213 states and 366590 transitions. [2022-07-22 12:25:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:42,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 709 [2022-07-22 12:25:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:43,217 INFO L225 Difference]: With dead ends: 343213 [2022-07-22 12:25:43,217 INFO L226 Difference]: Without dead ends: 171232 [2022-07-22 12:25:43,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 709 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:25:43,291 INFO L413 NwaCegarLoop]: 1373 mSDtfsCounter, 489 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:43,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 1381 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 12:25:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171232 states. [2022-07-22 12:25:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171232 to 169730. [2022-07-22 12:25:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169730 states, 169729 states have (on average 1.05812795691956) internal successors, (179595), 169729 states have internal predecessors, (179595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169730 states to 169730 states and 179595 transitions. [2022-07-22 12:25:45,873 INFO L78 Accepts]: Start accepts. Automaton has 169730 states and 179595 transitions. Word has length 709 [2022-07-22 12:25:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:45,874 INFO L495 AbstractCegarLoop]: Abstraction has 169730 states and 179595 transitions. [2022-07-22 12:25:45,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 169730 states and 179595 transitions. [2022-07-22 12:25:45,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-07-22 12:25:45,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:45,900 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:45,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 12:25:46,104 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,SelfDestructingSolverStorable16 [2022-07-22 12:25:46,105 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash 571713711, now seen corresponding path program 1 times [2022-07-22 12:25:46,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:46,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930282769] [2022-07-22 12:25:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:46,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 508 proven. 25 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-22 12:25:46,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:46,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930282769] [2022-07-22 12:25:46,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930282769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:25:46,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347217512] [2022-07-22 12:25:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:46,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:25:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:25:46,556 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) [2022-07-22 12:25:46,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:25:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:25:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:25:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-22 12:25:47,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:25:47,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347217512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:47,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:25:47,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-22 12:25:47,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130942972] [2022-07-22 12:25:47,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:47,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:25:47,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:47,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:25:47,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:25:47,303 INFO L87 Difference]: Start difference. First operand 169730 states and 179595 transitions. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:50,725 INFO L93 Difference]: Finished difference Result 340960 states and 360725 transitions. [2022-07-22 12:25:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:25:50,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 726 [2022-07-22 12:25:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:50,954 INFO L225 Difference]: With dead ends: 340960 [2022-07-22 12:25:50,954 INFO L226 Difference]: Without dead ends: 168979 [2022-07-22 12:25:51,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:25:51,031 INFO L413 NwaCegarLoop]: 1342 mSDtfsCounter, 492 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:51,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1350 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 12:25:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168979 states. [2022-07-22 12:25:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168979 to 167477. [2022-07-22 12:25:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167477 states, 167476 states have (on average 1.0556796197664142) internal successors, (176801), 167476 states have internal predecessors, (176801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167477 states to 167477 states and 176801 transitions. [2022-07-22 12:25:53,416 INFO L78 Accepts]: Start accepts. Automaton has 167477 states and 176801 transitions. Word has length 726 [2022-07-22 12:25:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:25:53,417 INFO L495 AbstractCegarLoop]: Abstraction has 167477 states and 176801 transitions. [2022-07-22 12:25:53,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 167477 states and 176801 transitions. [2022-07-22 12:25:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2022-07-22 12:25:53,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:25:53,464 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:25:53,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 12:25:53,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 12:25:53,680 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:25:53,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:25:53,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1445452210, now seen corresponding path program 1 times [2022-07-22 12:25:53,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:25:53,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567119278] [2022-07-22 12:25:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:25:53,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:25:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:25:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 562 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-07-22 12:25:54,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:25:54,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567119278] [2022-07-22 12:25:54,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567119278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:25:54,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:25:54,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:25:54,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527630809] [2022-07-22 12:25:54,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:25:54,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:25:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:25:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:25:54,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:25:54,069 INFO L87 Difference]: Start difference. First operand 167477 states and 176801 transitions. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:25:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:25:57,830 INFO L93 Difference]: Finished difference Result 334676 states and 353319 transitions. [2022-07-22 12:25:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 12:25:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 755 [2022-07-22 12:25:57,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:25:58,028 INFO L225 Difference]: With dead ends: 334676 [2022-07-22 12:25:58,028 INFO L226 Difference]: Without dead ends: 167952 [2022-07-22 12:25:58,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:25:58,102 INFO L413 NwaCegarLoop]: 1337 mSDtfsCounter, 1118 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3338 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 3783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 3338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:25:58,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1118 Valid, 1354 Invalid, 3783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 3338 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:25:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167952 states. [2022-07-22 12:26:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167952 to 167477. [2022-07-22 12:26:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167477 states, 167476 states have (on average 1.0539122023454106) internal successors, (176505), 167476 states have internal predecessors, (176505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167477 states to 167477 states and 176505 transitions. [2022-07-22 12:26:00,332 INFO L78 Accepts]: Start accepts. Automaton has 167477 states and 176505 transitions. Word has length 755 [2022-07-22 12:26:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:26:00,333 INFO L495 AbstractCegarLoop]: Abstraction has 167477 states and 176505 transitions. [2022-07-22 12:26:00,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:26:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 167477 states and 176505 transitions. [2022-07-22 12:26:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2022-07-22 12:26:00,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:26:00,353 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:26:00,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 12:26:00,353 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:26:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:26:00,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1405891327, now seen corresponding path program 1 times [2022-07-22 12:26:00,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:26:00,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86991901] [2022-07-22 12:26:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:00,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:26:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 416 proven. 416 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-22 12:26:00,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:26:00,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86991901] [2022-07-22 12:26:00,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86991901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:26:00,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938143603] [2022-07-22 12:26:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:26:00,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:26:00,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:26:00,592 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) [2022-07-22 12:26:00,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 12:26:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:26:00,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:26:00,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:26:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 593 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-07-22 12:26:01,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:26:01,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938143603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:26:01,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:26:01,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 12:26:01,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762781707] [2022-07-22 12:26:01,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:26:01,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:26:01,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:26:01,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:26:01,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:26:01,749 INFO L87 Difference]: Start difference. First operand 167477 states and 176505 transitions. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)