./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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 3af6b76c8112c46f4f3f430659495baba58dab9f6300080b3889ede952fb5526 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 18:53:09,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 18:53:09,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 18:53:09,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 18:53:09,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 18:53:09,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 18:53:09,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 18:53:09,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 18:53:09,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 18:53:09,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 18:53:09,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 18:53:09,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 18:53:09,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 18:53:09,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 18:53:09,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 18:53:09,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 18:53:09,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 18:53:09,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 18:53:09,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 18:53:09,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 18:53:09,464 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 18:53:09,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 18:53:09,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 18:53:09,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 18:53:09,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 18:53:09,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 18:53:09,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 18:53:09,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 18:53:09,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 18:53:09,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 18:53:09,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 18:53:09,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 18:53:09,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 18:53:09,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 18:53:09,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 18:53:09,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 18:53:09,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 18:53:09,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 18:53:09,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 18:53:09,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 18:53:09,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 18:53:09,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 18:53:09,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 18:53:09,513 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 18:53:09,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 18:53:09,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 18:53:09,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 18:53:09,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 18:53:09,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 18:53:09,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 18:53:09,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 18:53:09,516 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 18:53:09,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 18:53:09,517 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 18:53:09,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 18:53:09,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 18:53:09,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 18:53:09,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 18:53:09,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 18:53:09,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 18:53:09,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 18:53:09,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 18:53:09,519 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 18:53:09,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 18:53:09,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 18:53:09,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 18:53:09,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 18:53:09,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 18:53:09,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 18:53:09,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 18:53:09,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 18:53:09,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 18:53:09,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 18:53:09,522 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 18:53:09,522 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 18:53:09,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 18:53:09,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3af6b76c8112c46f4f3f430659495baba58dab9f6300080b3889ede952fb5526 [2022-07-22 18:53:09,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 18:53:09,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 18:53:09,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 18:53:09,742 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 18:53:09,742 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 18:53:09,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-07-22 18:53:09,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3146a92b/c7146f1c0ada4a3292f8640863d6a759/FLAG035f9e193 [2022-07-22 18:53:10,237 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 18:53:10,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-07-22 18:53:10,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3146a92b/c7146f1c0ada4a3292f8640863d6a759/FLAG035f9e193 [2022-07-22 18:53:10,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3146a92b/c7146f1c0ada4a3292f8640863d6a759 [2022-07-22 18:53:10,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 18:53:10,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 18:53:10,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 18:53:10,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 18:53:10,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 18:53:10,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdcace2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10, skipping insertion in model container [2022-07-22 18:53:10,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 18:53:10,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 18:53:10,504 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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7752,7765] [2022-07-22 18:53:10,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 18:53:10,547 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 18:53:10,605 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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7752,7765] [2022-07-22 18:53:10,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 18:53:10,651 INFO L208 MainTranslator]: Completed translation [2022-07-22 18:53:10,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10 WrapperNode [2022-07-22 18:53:10,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 18:53:10,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 18:53:10,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 18:53:10,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 18:53:10,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,714 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 617 [2022-07-22 18:53:10,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 18:53:10,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 18:53:10,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 18:53:10,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 18:53:10,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 18:53:10,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 18:53:10,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 18:53:10,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 18:53:10,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (1/1) ... [2022-07-22 18:53:10,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 18:53:10,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 18:53:10,817 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 18:53:10,842 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 18:53:10,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 18:53:10,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 18:53:10,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 18:53:10,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 18:53:11,011 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 18:53:11,012 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 18:53:11,573 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 18:53:11,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 18:53:11,580 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 18:53:11,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 06:53:11 BoogieIcfgContainer [2022-07-22 18:53:11,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 18:53:11,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 18:53:11,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 18:53:11,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 18:53:11,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 06:53:10" (1/3) ... [2022-07-22 18:53:11,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6607de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 06:53:11, skipping insertion in model container [2022-07-22 18:53:11,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 06:53:10" (2/3) ... [2022-07-22 18:53:11,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6607de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 06:53:11, skipping insertion in model container [2022-07-22 18:53:11,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 06:53:11" (3/3) ... [2022-07-22 18:53:11,588 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-07-22 18:53:11,598 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 18:53:11,598 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 18:53:11,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 18:53:11,648 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@7657144b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1ba58b8e [2022-07-22 18:53:11,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 18:53:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.7346938775510203) internal successors, (255), 148 states have internal predecessors, (255), 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 18:53:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 18:53:11,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:11,669 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, 1, 1, 1, 1, 1, 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 18:53:11,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:11,674 INFO L85 PathProgramCache]: Analyzing trace with hash -970283638, now seen corresponding path program 1 times [2022-07-22 18:53:11,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:11,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000893620] [2022-07-22 18:53:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:11,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:11,965 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 18:53:11,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:11,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000893620] [2022-07-22 18:53:11,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000893620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:11,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:11,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:53:11,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109912665] [2022-07-22 18:53:11,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:11,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:53:11,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:11,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:53:11,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:53:11,997 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.7346938775510203) internal successors, (255), 148 states have internal predecessors, (255), 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 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 18:53:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:12,089 INFO L93 Difference]: Finished difference Result 335 states and 559 transitions. [2022-07-22 18:53:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:53:12,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2022-07-22 18:53:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:12,103 INFO L225 Difference]: With dead ends: 335 [2022-07-22 18:53:12,103 INFO L226 Difference]: Without dead ends: 231 [2022-07-22 18:53:12,107 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 18:53:12,110 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 151 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:12,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 448 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-22 18:53:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2022-07-22 18:53:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.5814977973568283) internal successors, (359), 227 states have internal predecessors, (359), 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 18:53:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 359 transitions. [2022-07-22 18:53:12,159 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 359 transitions. Word has length 56 [2022-07-22 18:53:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:12,159 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 359 transitions. [2022-07-22 18:53:12,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 18:53:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 359 transitions. [2022-07-22 18:53:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 18:53:12,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:12,162 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, 1, 1, 1, 1, 1, 1, 1, 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 18:53:12,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 18:53:12,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:12,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1615417163, now seen corresponding path program 1 times [2022-07-22 18:53:12,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:12,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915132741] [2022-07-22 18:53:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:12,329 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 18:53:12,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:12,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915132741] [2022-07-22 18:53:12,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915132741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:12,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:12,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:53:12,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588299315] [2022-07-22 18:53:12,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:12,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:53:12,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:12,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:53:12,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:53:12,336 INFO L87 Difference]: Start difference. First operand 228 states and 359 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 18:53:12,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:12,404 INFO L93 Difference]: Finished difference Result 566 states and 911 transitions. [2022-07-22 18:53:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:53:12,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2022-07-22 18:53:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:12,407 INFO L225 Difference]: With dead ends: 566 [2022-07-22 18:53:12,407 INFO L226 Difference]: Without dead ends: 389 [2022-07-22 18:53:12,408 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 18:53:12,410 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 133 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:12,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 424 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-22 18:53:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 385. [2022-07-22 18:53:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5989583333333333) internal successors, (614), 384 states have internal predecessors, (614), 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 18:53:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 614 transitions. [2022-07-22 18:53:12,447 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 614 transitions. Word has length 58 [2022-07-22 18:53:12,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:12,448 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 614 transitions. [2022-07-22 18:53:12,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 18:53:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 614 transitions. [2022-07-22 18:53:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 18:53:12,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:12,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:12,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 18:53:12,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:12,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1881805132, now seen corresponding path program 1 times [2022-07-22 18:53:12,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:12,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543838] [2022-07-22 18:53:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:12,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:12,517 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 18:53:12,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:12,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543838] [2022-07-22 18:53:12,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:12,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:12,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:53:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365001618] [2022-07-22 18:53:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:12,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:53:12,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:12,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:53:12,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:53:12,520 INFO L87 Difference]: Start difference. First operand 385 states and 614 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 18:53:12,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:12,588 INFO L93 Difference]: Finished difference Result 1021 states and 1648 transitions. [2022-07-22 18:53:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:53:12,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2022-07-22 18:53:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:12,592 INFO L225 Difference]: With dead ends: 1021 [2022-07-22 18:53:12,594 INFO L226 Difference]: Without dead ends: 687 [2022-07-22 18:53:12,596 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 18:53:12,599 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 127 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:12,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 425 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-07-22 18:53:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 681. [2022-07-22 18:53:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.6029411764705883) internal successors, (1090), 680 states have internal predecessors, (1090), 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 18:53:12,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1090 transitions. [2022-07-22 18:53:12,666 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1090 transitions. Word has length 60 [2022-07-22 18:53:12,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:12,667 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1090 transitions. [2022-07-22 18:53:12,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 18:53:12,667 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1090 transitions. [2022-07-22 18:53:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 18:53:12,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:12,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:12,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 18:53:12,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 333047117, now seen corresponding path program 1 times [2022-07-22 18:53:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527980077] [2022-07-22 18:53:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:12,743 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 18:53:12,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527980077] [2022-07-22 18:53:12,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527980077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:12,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:12,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:53:12,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713730186] [2022-07-22 18:53:12,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:12,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:53:12,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:12,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:53:12,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:53:12,746 INFO L87 Difference]: Start difference. First operand 681 states and 1090 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 18:53:13,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:13,021 INFO L93 Difference]: Finished difference Result 2973 states and 4848 transitions. [2022-07-22 18:53:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 18:53:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 62 [2022-07-22 18:53:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:13,035 INFO L225 Difference]: With dead ends: 2973 [2022-07-22 18:53:13,035 INFO L226 Difference]: Without dead ends: 2343 [2022-07-22 18:53:13,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 18:53:13,048 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1026 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:13,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 1572 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:53:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2022-07-22 18:53:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1233. [2022-07-22 18:53:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 1.6112012987012987) internal successors, (1985), 1232 states have internal predecessors, (1985), 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 18:53:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1985 transitions. [2022-07-22 18:53:13,160 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1985 transitions. Word has length 62 [2022-07-22 18:53:13,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:13,162 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 1985 transitions. [2022-07-22 18:53:13,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 18:53:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1985 transitions. [2022-07-22 18:53:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 18:53:13,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:13,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:13,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 18:53:13,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1672021844, now seen corresponding path program 1 times [2022-07-22 18:53:13,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:13,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437200241] [2022-07-22 18:53:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:13,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:13,259 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 18:53:13,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:13,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437200241] [2022-07-22 18:53:13,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437200241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:13,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:13,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:53:13,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61010480] [2022-07-22 18:53:13,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:13,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:53:13,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:13,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:53:13,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:53:13,262 INFO L87 Difference]: Start difference. First operand 1233 states and 1985 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 18:53:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:13,485 INFO L93 Difference]: Finished difference Result 3613 states and 5881 transitions. [2022-07-22 18:53:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:53:13,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2022-07-22 18:53:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:13,495 INFO L225 Difference]: With dead ends: 3613 [2022-07-22 18:53:13,496 INFO L226 Difference]: Without dead ends: 2431 [2022-07-22 18:53:13,498 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 18:53:13,498 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 456 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:13,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 769 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2022-07-22 18:53:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1823. [2022-07-22 18:53:13,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1822 states have (on average 1.6169045005488474) internal successors, (2946), 1822 states have internal predecessors, (2946), 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 18:53:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2946 transitions. [2022-07-22 18:53:13,643 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2946 transitions. Word has length 63 [2022-07-22 18:53:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:13,644 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 2946 transitions. [2022-07-22 18:53:13,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 18:53:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2946 transitions. [2022-07-22 18:53:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 18:53:13,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:13,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:13,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 18:53:13,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:13,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:13,647 INFO L85 PathProgramCache]: Analyzing trace with hash 235123444, now seen corresponding path program 1 times [2022-07-22 18:53:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:13,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633976338] [2022-07-22 18:53:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:13,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:13,695 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 18:53:13,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:13,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633976338] [2022-07-22 18:53:13,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633976338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:13,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:13,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:53:13,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420797997] [2022-07-22 18:53:13,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:13,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:53:13,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:13,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:53:13,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:53:13,698 INFO L87 Difference]: Start difference. First operand 1823 states and 2946 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 18:53:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:13,986 INFO L93 Difference]: Finished difference Result 5307 states and 8625 transitions. [2022-07-22 18:53:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:53:13,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 64 [2022-07-22 18:53:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:14,001 INFO L225 Difference]: With dead ends: 5307 [2022-07-22 18:53:14,002 INFO L226 Difference]: Without dead ends: 3535 [2022-07-22 18:53:14,005 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 18:53:14,006 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 456 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:14,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 711 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2022-07-22 18:53:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 2667. [2022-07-22 18:53:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2666 states have (on average 1.6151537884471119) internal successors, (4306), 2666 states have internal predecessors, (4306), 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 18:53:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 4306 transitions. [2022-07-22 18:53:14,223 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 4306 transitions. Word has length 64 [2022-07-22 18:53:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:14,223 INFO L495 AbstractCegarLoop]: Abstraction has 2667 states and 4306 transitions. [2022-07-22 18:53:14,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 18:53:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 4306 transitions. [2022-07-22 18:53:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 18:53:14,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:14,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:14,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 18:53:14,226 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:14,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1354495973, now seen corresponding path program 1 times [2022-07-22 18:53:14,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:14,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33668705] [2022-07-22 18:53:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:14,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:14,289 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 18:53:14,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:14,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33668705] [2022-07-22 18:53:14,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33668705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:14,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:14,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 18:53:14,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218752643] [2022-07-22 18:53:14,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:14,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 18:53:14,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:14,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 18:53:14,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 18:53:14,292 INFO L87 Difference]: Start difference. First operand 2667 states and 4306 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 18:53:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:14,673 INFO L93 Difference]: Finished difference Result 7707 states and 12501 transitions. [2022-07-22 18:53:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 18:53:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2022-07-22 18:53:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:14,695 INFO L225 Difference]: With dead ends: 7707 [2022-07-22 18:53:14,695 INFO L226 Difference]: Without dead ends: 5091 [2022-07-22 18:53:14,700 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 18:53:14,701 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 454 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:14,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 754 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:53:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5091 states. [2022-07-22 18:53:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5091 to 3863. [2022-07-22 18:53:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 1.6126359399274988) internal successors, (6228), 3862 states have internal predecessors, (6228), 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 18:53:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 6228 transitions. [2022-07-22 18:53:15,001 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 6228 transitions. Word has length 65 [2022-07-22 18:53:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:15,002 INFO L495 AbstractCegarLoop]: Abstraction has 3863 states and 6228 transitions. [2022-07-22 18:53:15,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 18:53:15,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 6228 transitions. [2022-07-22 18:53:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 18:53:15,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:15,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:15,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 18:53:15,005 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:15,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1658042238, now seen corresponding path program 1 times [2022-07-22 18:53:15,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:15,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705209762] [2022-07-22 18:53:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:15,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:15,051 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 18:53:15,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:15,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705209762] [2022-07-22 18:53:15,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705209762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:15,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:15,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:53:15,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029534568] [2022-07-22 18:53:15,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:15,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:53:15,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:53:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:53:15,055 INFO L87 Difference]: Start difference. First operand 3863 states and 6228 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 18:53:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:15,511 INFO L93 Difference]: Finished difference Result 8640 states and 14034 transitions. [2022-07-22 18:53:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:53:15,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2022-07-22 18:53:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:15,533 INFO L225 Difference]: With dead ends: 8640 [2022-07-22 18:53:15,534 INFO L226 Difference]: Without dead ends: 5875 [2022-07-22 18:53:15,539 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 18:53:15,540 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 138 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:15,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 524 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2022-07-22 18:53:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 5873. [2022-07-22 18:53:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5872 states have (on average 1.6130790190735695) internal successors, (9472), 5872 states have internal predecessors, (9472), 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 18:53:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 9472 transitions. [2022-07-22 18:53:15,980 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 9472 transitions. Word has length 66 [2022-07-22 18:53:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:15,980 INFO L495 AbstractCegarLoop]: Abstraction has 5873 states and 9472 transitions. [2022-07-22 18:53:15,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 18:53:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 9472 transitions. [2022-07-22 18:53:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 18:53:15,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:15,982 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:15,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 18:53:15,982 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:15,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1876407130, now seen corresponding path program 1 times [2022-07-22 18:53:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:15,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387926753] [2022-07-22 18:53:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:16,018 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 18:53:16,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:16,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387926753] [2022-07-22 18:53:16,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387926753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:16,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:16,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:53:16,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201601304] [2022-07-22 18:53:16,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:16,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:53:16,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:16,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:53:16,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:53:16,020 INFO L87 Difference]: Start difference. First operand 5873 states and 9472 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 18:53:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:16,578 INFO L93 Difference]: Finished difference Result 12987 states and 20989 transitions. [2022-07-22 18:53:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:53:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2022-07-22 18:53:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:16,610 INFO L225 Difference]: With dead ends: 12987 [2022-07-22 18:53:16,610 INFO L226 Difference]: Without dead ends: 8817 [2022-07-22 18:53:16,619 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 18:53:16,622 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 126 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:16,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 469 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2022-07-22 18:53:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 8815. [2022-07-22 18:53:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8815 states, 8814 states have (on average 1.6056274109371456) internal successors, (14152), 8814 states have internal predecessors, (14152), 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 18:53:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 14152 transitions. [2022-07-22 18:53:17,338 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 14152 transitions. Word has length 66 [2022-07-22 18:53:17,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:17,339 INFO L495 AbstractCegarLoop]: Abstraction has 8815 states and 14152 transitions. [2022-07-22 18:53:17,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 18:53:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 14152 transitions. [2022-07-22 18:53:17,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-22 18:53:17,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:17,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:17,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 18:53:17,341 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:17,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:17,342 INFO L85 PathProgramCache]: Analyzing trace with hash -430026452, now seen corresponding path program 1 times [2022-07-22 18:53:17,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:17,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924742367] [2022-07-22 18:53:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:17,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:17,380 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 18:53:17,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:17,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924742367] [2022-07-22 18:53:17,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924742367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:17,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:17,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 18:53:17,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902216205] [2022-07-22 18:53:17,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:17,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 18:53:17,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:17,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 18:53:17,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 18:53:17,383 INFO L87 Difference]: Start difference. First operand 8815 states and 14152 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 18:53:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:18,013 INFO L93 Difference]: Finished difference Result 19164 states and 30838 transitions. [2022-07-22 18:53:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 18:53:18,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2022-07-22 18:53:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:18,053 INFO L225 Difference]: With dead ends: 19164 [2022-07-22 18:53:18,054 INFO L226 Difference]: Without dead ends: 12900 [2022-07-22 18:53:18,069 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 18:53:18,070 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 132 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:18,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 509 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12900 states. [2022-07-22 18:53:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12900 to 12898. [2022-07-22 18:53:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12898 states, 12897 states have (on average 1.5971931456927968) internal successors, (20599), 12897 states have internal predecessors, (20599), 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 18:53:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12898 states to 12898 states and 20599 transitions. [2022-07-22 18:53:18,907 INFO L78 Accepts]: Start accepts. Automaton has 12898 states and 20599 transitions. Word has length 66 [2022-07-22 18:53:18,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:18,907 INFO L495 AbstractCegarLoop]: Abstraction has 12898 states and 20599 transitions. [2022-07-22 18:53:18,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 18:53:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 12898 states and 20599 transitions. [2022-07-22 18:53:18,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 18:53:18,909 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:18,909 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:18,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 18:53:18,909 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:18,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:18,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1812850740, now seen corresponding path program 1 times [2022-07-22 18:53:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:18,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175896087] [2022-07-22 18:53:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:18,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:19,051 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 18:53:19,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175896087] [2022-07-22 18:53:19,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175896087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:19,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:19,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:53:19,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327350780] [2022-07-22 18:53:19,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:19,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:53:19,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:53:19,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:53:19,057 INFO L87 Difference]: Start difference. First operand 12898 states and 20599 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 18:53:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:20,046 INFO L93 Difference]: Finished difference Result 25713 states and 41080 transitions. [2022-07-22 18:53:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:53:20,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 67 [2022-07-22 18:53:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:20,084 INFO L225 Difference]: With dead ends: 25713 [2022-07-22 18:53:20,084 INFO L226 Difference]: Without dead ends: 12900 [2022-07-22 18:53:20,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 18:53:20,104 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 199 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:20,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 814 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:53:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12900 states. [2022-07-22 18:53:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12900 to 12898. [2022-07-22 18:53:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12898 states, 12897 states have (on average 1.5875009692176476) internal successors, (20474), 12897 states have internal predecessors, (20474), 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 18:53:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12898 states to 12898 states and 20474 transitions. [2022-07-22 18:53:20,866 INFO L78 Accepts]: Start accepts. Automaton has 12898 states and 20474 transitions. Word has length 67 [2022-07-22 18:53:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:20,867 INFO L495 AbstractCegarLoop]: Abstraction has 12898 states and 20474 transitions. [2022-07-22 18:53:20,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 18:53:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 12898 states and 20474 transitions. [2022-07-22 18:53:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 18:53:20,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:20,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:20,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 18:53:20,870 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:20,871 INFO L85 PathProgramCache]: Analyzing trace with hash 528800646, now seen corresponding path program 1 times [2022-07-22 18:53:20,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:20,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354903415] [2022-07-22 18:53:20,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:20,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:20,957 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 18:53:20,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354903415] [2022-07-22 18:53:20,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354903415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:20,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:20,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:53:20,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24655549] [2022-07-22 18:53:20,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:20,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:53:20,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:20,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:53:20,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:53:20,960 INFO L87 Difference]: Start difference. First operand 12898 states and 20474 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 18:53:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:22,199 INFO L93 Difference]: Finished difference Result 36933 states and 58774 transitions. [2022-07-22 18:53:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:53:22,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 70 [2022-07-22 18:53:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:22,261 INFO L225 Difference]: With dead ends: 36933 [2022-07-22 18:53:22,262 INFO L226 Difference]: Without dead ends: 24120 [2022-07-22 18:53:22,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 18:53:22,291 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 449 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:22,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 623 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24120 states. [2022-07-22 18:53:23,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24120 to 24118. [2022-07-22 18:53:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24118 states, 24117 states have (on average 1.5768545009744164) internal successors, (38029), 24117 states have internal predecessors, (38029), 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 18:53:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24118 states to 24118 states and 38029 transitions. [2022-07-22 18:53:24,021 INFO L78 Accepts]: Start accepts. Automaton has 24118 states and 38029 transitions. Word has length 70 [2022-07-22 18:53:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:24,021 INFO L495 AbstractCegarLoop]: Abstraction has 24118 states and 38029 transitions. [2022-07-22 18:53:24,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 18:53:24,021 INFO L276 IsEmpty]: Start isEmpty. Operand 24118 states and 38029 transitions. [2022-07-22 18:53:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 18:53:24,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:24,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:24,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 18:53:24,023 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash -788958455, now seen corresponding path program 1 times [2022-07-22 18:53:24,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:24,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114510903] [2022-07-22 18:53:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:24,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:24,116 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 18:53:24,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:24,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114510903] [2022-07-22 18:53:24,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114510903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:24,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:24,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:53:24,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577657931] [2022-07-22 18:53:24,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:24,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:53:24,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:24,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:53:24,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:53:24,118 INFO L87 Difference]: Start difference. First operand 24118 states and 38029 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 18:53:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:26,616 INFO L93 Difference]: Finished difference Result 46045 states and 72310 transitions. [2022-07-22 18:53:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 18:53:26,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 71 [2022-07-22 18:53:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:26,716 INFO L225 Difference]: With dead ends: 46045 [2022-07-22 18:53:26,716 INFO L226 Difference]: Without dead ends: 46043 [2022-07-22 18:53:26,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 18:53:26,743 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 286 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:26,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1070 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46043 states. [2022-07-22 18:53:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46043 to 24842. [2022-07-22 18:53:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24842 states, 24841 states have (on average 1.5596795620144117) internal successors, (38744), 24841 states have internal predecessors, (38744), 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 18:53:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24842 states to 24842 states and 38744 transitions. [2022-07-22 18:53:28,720 INFO L78 Accepts]: Start accepts. Automaton has 24842 states and 38744 transitions. Word has length 71 [2022-07-22 18:53:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:28,721 INFO L495 AbstractCegarLoop]: Abstraction has 24842 states and 38744 transitions. [2022-07-22 18:53:28,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 18:53:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 24842 states and 38744 transitions. [2022-07-22 18:53:28,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 18:53:28,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:28,723 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 18:53:28,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 18:53:28,724 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:28,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:28,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1288596918, now seen corresponding path program 1 times [2022-07-22 18:53:28,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:28,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735617172] [2022-07-22 18:53:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:28,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 18:53:28,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:28,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735617172] [2022-07-22 18:53:28,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735617172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:28,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:28,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:53:28,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128920506] [2022-07-22 18:53:28,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:28,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:53:28,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:53:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:53:28,790 INFO L87 Difference]: Start difference. First operand 24842 states and 38744 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 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 18:53:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:32,556 INFO L93 Difference]: Finished difference Result 60730 states and 95066 transitions. [2022-07-22 18:53:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:53:32,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 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 97 [2022-07-22 18:53:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:32,632 INFO L225 Difference]: With dead ends: 60730 [2022-07-22 18:53:32,633 INFO L226 Difference]: Without dead ends: 48768 [2022-07-22 18:53:32,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:53:32,652 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 576 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:32,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1025 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 18:53:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48768 states. [2022-07-22 18:53:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48768 to 38122. [2022-07-22 18:53:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38122 states, 38121 states have (on average 1.5579864116890954) internal successors, (59392), 38121 states have internal predecessors, (59392), 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 18:53:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38122 states to 38122 states and 59392 transitions. [2022-07-22 18:53:35,342 INFO L78 Accepts]: Start accepts. Automaton has 38122 states and 59392 transitions. Word has length 97 [2022-07-22 18:53:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:35,343 INFO L495 AbstractCegarLoop]: Abstraction has 38122 states and 59392 transitions. [2022-07-22 18:53:35,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 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 18:53:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 38122 states and 59392 transitions. [2022-07-22 18:53:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 18:53:35,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:35,348 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 18:53:35,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 18:53:35,348 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1070232026, now seen corresponding path program 1 times [2022-07-22 18:53:35,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:35,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977342424] [2022-07-22 18:53:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:35,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 18:53:35,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:35,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977342424] [2022-07-22 18:53:35,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977342424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:35,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:35,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:53:35,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080492747] [2022-07-22 18:53:35,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:35,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:53:35,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:35,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:53:35,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:53:35,415 INFO L87 Difference]: Start difference. First operand 38122 states and 59392 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 18:53:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 18:53:39,634 INFO L93 Difference]: Finished difference Result 68116 states and 106638 transitions. [2022-07-22 18:53:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 18:53:39,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 97 [2022-07-22 18:53:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 18:53:39,752 INFO L225 Difference]: With dead ends: 68116 [2022-07-22 18:53:39,752 INFO L226 Difference]: Without dead ends: 56384 [2022-07-22 18:53:39,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 18:53:39,790 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 587 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 18:53:39,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1028 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 18:53:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56384 states. [2022-07-22 18:53:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56384 to 51626. [2022-07-22 18:53:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51626 states, 51625 states have (on average 1.5596707021791767) internal successors, (80518), 51625 states have internal predecessors, (80518), 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 18:53:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51626 states to 51626 states and 80518 transitions. [2022-07-22 18:53:43,983 INFO L78 Accepts]: Start accepts. Automaton has 51626 states and 80518 transitions. Word has length 97 [2022-07-22 18:53:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 18:53:43,983 INFO L495 AbstractCegarLoop]: Abstraction has 51626 states and 80518 transitions. [2022-07-22 18:53:43,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 18:53:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand 51626 states and 80518 transitions. [2022-07-22 18:53:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 18:53:43,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 18:53:43,986 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 18:53:43,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 18:53:43,986 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 18:53:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 18:53:43,987 INFO L85 PathProgramCache]: Analyzing trace with hash 918301688, now seen corresponding path program 1 times [2022-07-22 18:53:43,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 18:53:43,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247369147] [2022-07-22 18:53:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 18:53:43,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 18:53:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 18:53:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 18:53:44,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 18:53:44,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247369147] [2022-07-22 18:53:44,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247369147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 18:53:44,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 18:53:44,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 18:53:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800547083] [2022-07-22 18:53:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 18:53:44,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 18:53:44,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 18:53:44,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 18:53:44,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 18:53:44,045 INFO L87 Difference]: Start difference. First operand 51626 states and 80518 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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)