./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label50.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 c0a29c0650858169a7f06788e2d55d3441e7b25ce879ddd70ee1db162c004af4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:22:41,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:22:41,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:22:41,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:22:41,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:22:41,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:22:41,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:22:41,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:22:41,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:22:41,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:22:41,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:22:41,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:22:41,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:22:41,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:22:41,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:22:41,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:22:41,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:22:41,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:22:41,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:22:41,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:22:41,489 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:22:41,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:22:41,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:22:41,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:22:41,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:22:41,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:22:41,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:22:41,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:22:41,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:22:41,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:22:41,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:22:41,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:22:41,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:22:41,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:22:41,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:22:41,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:22:41,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:22:41,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:22:41,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:22:41,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:22:41,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:22:41,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:22:41,516 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:22:41,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:22:41,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:22:41,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:22:41,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:22:41,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:22:41,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:22:41,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:22:41,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:22:41,545 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:22:41,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:22:41,546 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:22:41,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:22:41,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:22:41,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:22:41,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:22:41,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:22:41,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:22:41,548 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:22:41,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:22:41,549 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:22:41,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:22:41,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:22:41,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:22:41,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:22:41,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:22:41,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:22:41,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:22:41,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:22:41,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:22:41,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:22:41,555 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:22:41,555 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:22:41,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:22:41,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0a29c0650858169a7f06788e2d55d3441e7b25ce879ddd70ee1db162c004af4 [2022-07-19 12:22:41,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:22:41,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:22:41,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:22:41,778 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:22:41,779 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:22:41,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2022-07-19 12:22:41,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dce0220d/5fdab22c379f47bb857899d0222db7cb/FLAGc436d1512 [2022-07-19 12:22:42,396 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:22:42,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2022-07-19 12:22:42,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dce0220d/5fdab22c379f47bb857899d0222db7cb/FLAGc436d1512 [2022-07-19 12:22:42,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dce0220d/5fdab22c379f47bb857899d0222db7cb [2022-07-19 12:22:42,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:22:42,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:22:42,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:22:42,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:22:42,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:22:42,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:22:42" (1/1) ... [2022-07-19 12:22:42,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150c4a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:42, skipping insertion in model container [2022-07-19 12:22:42,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:22:42" (1/1) ... [2022-07-19 12:22:42,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:22:42,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:22:43,002 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label50.c[8814,8827] [2022-07-19 12:22:43,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:22:43,616 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:22:43,655 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label50.c[8814,8827] [2022-07-19 12:22:43,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:22:44,005 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:22:44,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44 WrapperNode [2022-07-19 12:22:44,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:22:44,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:22:44,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:22:44,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:22:44,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (1/1) ... [2022-07-19 12:22:44,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (1/1) ... [2022-07-19 12:22:44,581 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-19 12:22:44,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:22:44,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:22:44,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:22:44,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:22:44,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (1/1) ... [2022-07-19 12:22:44,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (1/1) ... [2022-07-19 12:22:44,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (1/1) ... [2022-07-19 12:22:44,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (1/1) ... [2022-07-19 12:22:44,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (1/1) ... [2022-07-19 12:22:44,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (1/1) ... [2022-07-19 12:22:44,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (1/1) ... [2022-07-19 12:22:45,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:22:45,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:22:45,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:22:45,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:22:45,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (1/1) ... [2022-07-19 12:22:45,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:22:45,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:22:45,076 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) [2022-07-19 12:22:45,103 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 [2022-07-19 12:22:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:22:45,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:22:45,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:22:45,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:22:45,162 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:22:45,163 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:22:48,648 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:22:48,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:22:48,660 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:22:48,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:22:48 BoogieIcfgContainer [2022-07-19 12:22:48,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:22:48,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:22:48,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:22:48,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:22:48,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:22:42" (1/3) ... [2022-07-19 12:22:48,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233926e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:22:48, skipping insertion in model container [2022-07-19 12:22:48,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:22:44" (2/3) ... [2022-07-19 12:22:48,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233926e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:22:48, skipping insertion in model container [2022-07-19 12:22:48,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:22:48" (3/3) ... [2022-07-19 12:22:48,668 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label50.c [2022-07-19 12:22:48,677 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:22:48,678 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:22:48,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:22:48,727 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@2d251079, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f4dc42f [2022-07-19 12:22:48,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:22:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2022-07-19 12:22:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 12:22:48,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:48,742 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] [2022-07-19 12:22:48,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:48,746 INFO L85 PathProgramCache]: Analyzing trace with hash 531730986, now seen corresponding path program 1 times [2022-07-19 12:22:48,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:48,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684299383] [2022-07-19 12:22:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:48,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:22:48,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:48,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684299383] [2022-07-19 12:22:48,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684299383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:48,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:48,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:48,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032477747] [2022-07-19 12:22:48,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:48,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:22:48,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:48,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:22:48,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:22:48,995 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 4 states, 4 states have (on average 15.5) internal successors, (62), 3 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) [2022-07-19 12:22:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:54,110 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2022-07-19 12:22:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:22:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 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 [2022-07-19 12:22:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:54,140 INFO L225 Difference]: With dead ends: 3829 [2022-07-19 12:22:54,140 INFO L226 Difference]: Without dead ends: 2664 [2022-07-19 12:22:54,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:22:54,151 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 2666 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2666 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:54,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2666 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-07-19 12:22:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-07-19 12:22:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2022-07-19 12:22:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 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) [2022-07-19 12:22:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2022-07-19 12:22:54,247 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 62 [2022-07-19 12:22:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:54,247 INFO L495 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2022-07-19 12:22:54,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 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) [2022-07-19 12:22:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2022-07-19 12:22:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-19 12:22:54,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:54,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:22:54,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:22:54,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash 354009653, now seen corresponding path program 1 times [2022-07-19 12:22:54,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:54,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278108799] [2022-07-19 12:22:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:54,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:22:54,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:54,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278108799] [2022-07-19 12:22:54,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278108799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:54,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:54,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:54,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177930542] [2022-07-19 12:22:54,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:54,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:22:54,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:22:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:22:54,406 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 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) [2022-07-19 12:23:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:00,055 INFO L93 Difference]: Finished difference Result 7864 states and 12669 transitions. [2022-07-19 12:23:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:23:00,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 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 187 [2022-07-19 12:23:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:00,074 INFO L225 Difference]: With dead ends: 7864 [2022-07-19 12:23:00,075 INFO L226 Difference]: Without dead ends: 5990 [2022-07-19 12:23:00,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:23:00,081 INFO L413 NwaCegarLoop]: 894 mSDtfsCounter, 1617 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 6333 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 6333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:00,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1617 Valid, 1191 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 6333 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-07-19 12:23:00,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2022-07-19 12:23:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5859. [2022-07-19 12:23:00,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.4452031410037556) internal successors, (8466), 5858 states have internal predecessors, (8466), 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) [2022-07-19 12:23:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 8466 transitions. [2022-07-19 12:23:00,154 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 8466 transitions. Word has length 187 [2022-07-19 12:23:00,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:00,155 INFO L495 AbstractCegarLoop]: Abstraction has 5859 states and 8466 transitions. [2022-07-19 12:23:00,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 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) [2022-07-19 12:23:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 8466 transitions. [2022-07-19 12:23:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-07-19 12:23:00,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:00,163 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:00,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:23:00,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:00,167 INFO L85 PathProgramCache]: Analyzing trace with hash 747152322, now seen corresponding path program 1 times [2022-07-19 12:23:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:00,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383323924] [2022-07-19 12:23:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:00,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 12:23:00,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:00,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383323924] [2022-07-19 12:23:00,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383323924] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:00,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:00,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:23:00,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343773352] [2022-07-19 12:23:00,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:00,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:00,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:00,373 INFO L87 Difference]: Start difference. First operand 5859 states and 8466 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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) [2022-07-19 12:23:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:03,255 INFO L93 Difference]: Finished difference Result 15687 states and 23390 transitions. [2022-07-19 12:23:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:03,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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 229 [2022-07-19 12:23:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:03,285 INFO L225 Difference]: With dead ends: 15687 [2022-07-19 12:23:03,286 INFO L226 Difference]: Without dead ends: 10617 [2022-07-19 12:23:03,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:03,299 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 919 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:03,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 918 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:23:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10617 states. [2022-07-19 12:23:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10617 to 10608. [2022-07-19 12:23:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3551428302064674) internal successors, (14374), 10607 states have internal predecessors, (14374), 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) [2022-07-19 12:23:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14374 transitions. [2022-07-19 12:23:03,449 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14374 transitions. Word has length 229 [2022-07-19 12:23:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:03,450 INFO L495 AbstractCegarLoop]: Abstraction has 10608 states and 14374 transitions. [2022-07-19 12:23:03,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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) [2022-07-19 12:23:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14374 transitions. [2022-07-19 12:23:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-07-19 12:23:03,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:03,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:03,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:23:03,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1134775617, now seen corresponding path program 1 times [2022-07-19 12:23:03,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:03,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92545439] [2022-07-19 12:23:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:03,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 12:23:03,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:03,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92545439] [2022-07-19 12:23:03,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92545439] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:03,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:03,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:23:03,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439611414] [2022-07-19 12:23:03,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:03,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:03,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:03,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:03,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:03,604 INFO L87 Difference]: Start difference. First operand 10608 states and 14374 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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) [2022-07-19 12:23:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:06,315 INFO L93 Difference]: Finished difference Result 28351 states and 39240 transitions. [2022-07-19 12:23:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:06,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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 243 [2022-07-19 12:23:06,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:06,354 INFO L225 Difference]: With dead ends: 28351 [2022-07-19 12:23:06,354 INFO L226 Difference]: Without dead ends: 18532 [2022-07-19 12:23:06,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:06,370 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 909 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:06,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 613 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2872 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:23:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2022-07-19 12:23:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 18523. [2022-07-19 12:23:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18523 states, 18522 states have (on average 1.3251268761472843) internal successors, (24544), 18522 states have internal predecessors, (24544), 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) [2022-07-19 12:23:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18523 states to 18523 states and 24544 transitions. [2022-07-19 12:23:06,638 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 24544 transitions. Word has length 243 [2022-07-19 12:23:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:06,638 INFO L495 AbstractCegarLoop]: Abstraction has 18523 states and 24544 transitions. [2022-07-19 12:23:06,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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) [2022-07-19 12:23:06,639 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 24544 transitions. [2022-07-19 12:23:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-19 12:23:06,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:06,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:06,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:23:06,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:06,643 INFO L85 PathProgramCache]: Analyzing trace with hash -251504526, now seen corresponding path program 1 times [2022-07-19 12:23:06,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:06,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135632824] [2022-07-19 12:23:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:06,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:23:06,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:06,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135632824] [2022-07-19 12:23:06,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135632824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:06,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:06,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:06,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68164999] [2022-07-19 12:23:06,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:06,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:06,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:06,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:06,752 INFO L87 Difference]: Start difference. First operand 18523 states and 24544 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2022-07-19 12:23:09,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:09,434 INFO L93 Difference]: Finished difference Result 52015 states and 69799 transitions. [2022-07-19 12:23:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:09,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 261 [2022-07-19 12:23:09,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:09,501 INFO L225 Difference]: With dead ends: 52015 [2022-07-19 12:23:09,502 INFO L226 Difference]: Without dead ends: 34281 [2022-07-19 12:23:09,517 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 [2022-07-19 12:23:09,518 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 851 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:09,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 952 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:23:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34281 states. [2022-07-19 12:23:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34281 to 34271. [2022-07-19 12:23:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34271 states, 34270 states have (on average 1.2549168368835717) internal successors, (43006), 34270 states have internal predecessors, (43006), 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) [2022-07-19 12:23:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34271 states to 34271 states and 43006 transitions. [2022-07-19 12:23:09,929 INFO L78 Accepts]: Start accepts. Automaton has 34271 states and 43006 transitions. Word has length 261 [2022-07-19 12:23:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:09,930 INFO L495 AbstractCegarLoop]: Abstraction has 34271 states and 43006 transitions. [2022-07-19 12:23:09,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2022-07-19 12:23:09,932 INFO L276 IsEmpty]: Start isEmpty. Operand 34271 states and 43006 transitions. [2022-07-19 12:23:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-07-19 12:23:09,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:09,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:09,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:23:09,936 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:09,937 INFO L85 PathProgramCache]: Analyzing trace with hash -341439997, now seen corresponding path program 1 times [2022-07-19 12:23:09,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:09,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344989919] [2022-07-19 12:23:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:09,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-19 12:23:10,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:10,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344989919] [2022-07-19 12:23:10,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344989919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:10,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:10,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:23:10,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272847451] [2022-07-19 12:23:10,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:10,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:10,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:10,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:10,078 INFO L87 Difference]: Start difference. First operand 34271 states and 43006 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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) [2022-07-19 12:23:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:12,878 INFO L93 Difference]: Finished difference Result 92929 states and 117608 transitions. [2022-07-19 12:23:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:12,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 292 [2022-07-19 12:23:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:12,979 INFO L225 Difference]: With dead ends: 92929 [2022-07-19 12:23:12,979 INFO L226 Difference]: Without dead ends: 59447 [2022-07-19 12:23:13,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:13,017 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:13,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 986 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:23:13,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59447 states. [2022-07-19 12:23:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59447 to 56294. [2022-07-19 12:23:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56294 states, 56293 states have (on average 1.2005045032242019) internal successors, (67580), 56293 states have internal predecessors, (67580), 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) [2022-07-19 12:23:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56294 states to 56294 states and 67580 transitions. [2022-07-19 12:23:13,982 INFO L78 Accepts]: Start accepts. Automaton has 56294 states and 67580 transitions. Word has length 292 [2022-07-19 12:23:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:13,983 INFO L495 AbstractCegarLoop]: Abstraction has 56294 states and 67580 transitions. [2022-07-19 12:23:13,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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) [2022-07-19 12:23:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 56294 states and 67580 transitions. [2022-07-19 12:23:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-07-19 12:23:13,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:13,993 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:13,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:23:13,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1187004232, now seen corresponding path program 1 times [2022-07-19 12:23:13,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:13,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155473983] [2022-07-19 12:23:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:13,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-19 12:23:14,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:14,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155473983] [2022-07-19 12:23:14,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155473983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:14,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:14,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:14,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74851452] [2022-07-19 12:23:14,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:14,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:14,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:14,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:14,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:14,098 INFO L87 Difference]: Start difference. First operand 56294 states and 67580 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2022-07-19 12:23:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:17,656 INFO L93 Difference]: Finished difference Result 133057 states and 162012 transitions. [2022-07-19 12:23:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:17,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 350 [2022-07-19 12:23:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:17,754 INFO L225 Difference]: With dead ends: 133057 [2022-07-19 12:23:17,754 INFO L226 Difference]: Without dead ends: 77552 [2022-07-19 12:23:17,772 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 [2022-07-19 12:23:17,773 INFO L413 NwaCegarLoop]: 1796 mSDtfsCounter, 808 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:17,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 1947 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:23:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77552 states. [2022-07-19 12:23:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77552 to 76759. [2022-07-19 12:23:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76759 states, 76758 states have (on average 1.1668099742046432) internal successors, (89562), 76758 states have internal predecessors, (89562), 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) [2022-07-19 12:23:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76759 states to 76759 states and 89562 transitions. [2022-07-19 12:23:18,530 INFO L78 Accepts]: Start accepts. Automaton has 76759 states and 89562 transitions. Word has length 350 [2022-07-19 12:23:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:18,531 INFO L495 AbstractCegarLoop]: Abstraction has 76759 states and 89562 transitions. [2022-07-19 12:23:18,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2022-07-19 12:23:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 76759 states and 89562 transitions. [2022-07-19 12:23:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-07-19 12:23:18,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:18,537 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:18,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:23:18,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:18,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:18,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1602599278, now seen corresponding path program 1 times [2022-07-19 12:23:18,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:18,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245798853] [2022-07-19 12:23:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:18,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 12:23:18,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:18,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245798853] [2022-07-19 12:23:18,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245798853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:18,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:18,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:18,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644797143] [2022-07-19 12:23:18,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:18,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:23:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:23:18,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:23:18,635 INFO L87 Difference]: Start difference. First operand 76759 states and 89562 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2022-07-19 12:23:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:25,557 INFO L93 Difference]: Finished difference Result 205688 states and 241921 transitions. [2022-07-19 12:23:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:23:25,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 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 359 [2022-07-19 12:23:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:25,764 INFO L225 Difference]: With dead ends: 205688 [2022-07-19 12:23:25,765 INFO L226 Difference]: Without dead ends: 129718 [2022-07-19 12:23:25,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:23:25,794 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 1736 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6653 mSolverCounterSat, 1133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 7786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1133 IncrementalHoareTripleChecker+Valid, 6653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:25,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1736 Valid, 707 Invalid, 7786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1133 Valid, 6653 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-07-19 12:23:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129718 states. [2022-07-19 12:23:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129718 to 128793. [2022-07-19 12:23:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128793 states, 128792 states have (on average 1.162339275731412) internal successors, (149700), 128792 states have internal predecessors, (149700), 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) [2022-07-19 12:23:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128793 states to 128793 states and 149700 transitions. [2022-07-19 12:23:27,196 INFO L78 Accepts]: Start accepts. Automaton has 128793 states and 149700 transitions. Word has length 359 [2022-07-19 12:23:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:27,197 INFO L495 AbstractCegarLoop]: Abstraction has 128793 states and 149700 transitions. [2022-07-19 12:23:27,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2022-07-19 12:23:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 128793 states and 149700 transitions. [2022-07-19 12:23:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-07-19 12:23:27,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:27,202 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:23:27,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:23:27,202 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1513951045, now seen corresponding path program 1 times [2022-07-19 12:23:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:27,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27808119] [2022-07-19 12:23:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-19 12:23:27,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:27,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27808119] [2022-07-19 12:23:27,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27808119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:27,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:27,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:23:27,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838738541] [2022-07-19 12:23:27,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:27,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:27,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:27,290 INFO L87 Difference]: Start difference. First operand 128793 states and 149700 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2022-07-19 12:23:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:30,791 INFO L93 Difference]: Finished difference Result 240271 states and 281024 transitions. [2022-07-19 12:23:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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 359 [2022-07-19 12:23:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:30,955 INFO L225 Difference]: With dead ends: 240271 [2022-07-19 12:23:30,955 INFO L226 Difference]: Without dead ends: 128806 [2022-07-19 12:23:31,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:31,203 INFO L413 NwaCegarLoop]: 1019 mSDtfsCounter, 730 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:31,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1199 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:23:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128806 states. [2022-07-19 12:23:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128806 to 128006. [2022-07-19 12:23:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128006 states, 128005 states have (on average 1.1624389672278426) internal successors, (148798), 128005 states have internal predecessors, (148798), 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) [2022-07-19 12:23:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128006 states to 128006 states and 148798 transitions. [2022-07-19 12:23:32,789 INFO L78 Accepts]: Start accepts. Automaton has 128006 states and 148798 transitions. Word has length 359 [2022-07-19 12:23:32,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:32,792 INFO L495 AbstractCegarLoop]: Abstraction has 128006 states and 148798 transitions. [2022-07-19 12:23:32,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2022-07-19 12:23:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 128006 states and 148798 transitions. [2022-07-19 12:23:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-07-19 12:23:32,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:32,820 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:32,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 12:23:32,820 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash 558961745, now seen corresponding path program 1 times [2022-07-19 12:23:32,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:32,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449633837] [2022-07-19 12:23:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:32,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 288 proven. 113 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 12:23:33,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:33,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449633837] [2022-07-19 12:23:33,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449633837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:23:33,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652215779] [2022-07-19 12:23:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:33,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:23:33,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:23:33,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:23:33,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:23:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:33,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:23:33,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:23:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-19 12:23:33,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:23:33,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652215779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:33,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:23:33,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:23:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592495819] [2022-07-19 12:23:33,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:33,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:33,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:33,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:23:33,460 INFO L87 Difference]: Start difference. First operand 128006 states and 148798 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2022-07-19 12:23:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:36,760 INFO L93 Difference]: Finished difference Result 254434 states and 295649 transitions. [2022-07-19 12:23:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 388 [2022-07-19 12:23:36,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:36,945 INFO L225 Difference]: With dead ends: 254434 [2022-07-19 12:23:36,946 INFO L226 Difference]: Without dead ends: 127217 [2022-07-19 12:23:37,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:23:37,001 INFO L413 NwaCegarLoop]: 1363 mSDtfsCounter, 1122 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:37,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1444 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:23:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127217 states. [2022-07-19 12:23:38,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127217 to 127216. [2022-07-19 12:23:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127216 states, 127215 states have (on average 1.1196792831034077) internal successors, (142440), 127215 states have internal predecessors, (142440), 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) [2022-07-19 12:23:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127216 states to 127216 states and 142440 transitions. [2022-07-19 12:23:38,654 INFO L78 Accepts]: Start accepts. Automaton has 127216 states and 142440 transitions. Word has length 388 [2022-07-19 12:23:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:38,654 INFO L495 AbstractCegarLoop]: Abstraction has 127216 states and 142440 transitions. [2022-07-19 12:23:38,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2022-07-19 12:23:38,654 INFO L276 IsEmpty]: Start isEmpty. Operand 127216 states and 142440 transitions. [2022-07-19 12:23:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-07-19 12:23:38,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:38,665 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:23:38,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 12:23:38,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 12:23:38,880 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:38,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash -684842412, now seen corresponding path program 1 times [2022-07-19 12:23:38,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:38,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995589403] [2022-07-19 12:23:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:38,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-19 12:23:38,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995589403] [2022-07-19 12:23:38,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995589403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:38,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:38,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:38,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035864212] [2022-07-19 12:23:38,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:38,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:38,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:38,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:38,999 INFO L87 Difference]: Start difference. First operand 127216 states and 142440 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2022-07-19 12:23:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:42,357 INFO L93 Difference]: Finished difference Result 279629 states and 316499 transitions. [2022-07-19 12:23:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:42,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 456 [2022-07-19 12:23:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:42,554 INFO L225 Difference]: With dead ends: 279629 [2022-07-19 12:23:42,554 INFO L226 Difference]: Without dead ends: 153202 [2022-07-19 12:23:42,629 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 [2022-07-19 12:23:42,635 INFO L413 NwaCegarLoop]: 1759 mSDtfsCounter, 787 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:42,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1913 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:23:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153202 states. [2022-07-19 12:23:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153202 to 150820. [2022-07-19 12:23:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150820 states, 150819 states have (on average 1.1036474184287126) internal successors, (166451), 150819 states have internal predecessors, (166451), 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) [2022-07-19 12:23:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150820 states to 150820 states and 166451 transitions. [2022-07-19 12:23:44,496 INFO L78 Accepts]: Start accepts. Automaton has 150820 states and 166451 transitions. Word has length 456 [2022-07-19 12:23:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:44,500 INFO L495 AbstractCegarLoop]: Abstraction has 150820 states and 166451 transitions. [2022-07-19 12:23:44,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2022-07-19 12:23:44,500 INFO L276 IsEmpty]: Start isEmpty. Operand 150820 states and 166451 transitions. [2022-07-19 12:23:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-07-19 12:23:44,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:44,510 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:44,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 12:23:44,510 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1115352886, now seen corresponding path program 1 times [2022-07-19 12:23:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:44,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333092038] [2022-07-19 12:23:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-19 12:23:44,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:44,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333092038] [2022-07-19 12:23:44,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333092038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:44,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:44,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:44,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986663462] [2022-07-19 12:23:44,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:44,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:44,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:44,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:44,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:44,646 INFO L87 Difference]: Start difference. First operand 150820 states and 166451 transitions. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 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) [2022-07-19 12:23:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:49,310 INFO L93 Difference]: Finished difference Result 365544 states and 404234 transitions. [2022-07-19 12:23:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 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 466 [2022-07-19 12:23:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:49,625 INFO L225 Difference]: With dead ends: 365544 [2022-07-19 12:23:49,625 INFO L226 Difference]: Without dead ends: 215513 [2022-07-19 12:23:49,693 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 [2022-07-19 12:23:49,697 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 962 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 3084 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 3758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 3084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:49,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 580 Invalid, 3758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 3084 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-19 12:23:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215513 states. [2022-07-19 12:23:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215513 to 214616. [2022-07-19 12:23:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214616 states, 214615 states have (on average 1.1051184679542436) internal successors, (237175), 214615 states have internal predecessors, (237175), 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) [2022-07-19 12:23:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214616 states to 214616 states and 237175 transitions. [2022-07-19 12:23:52,438 INFO L78 Accepts]: Start accepts. Automaton has 214616 states and 237175 transitions. Word has length 466 [2022-07-19 12:23:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:52,439 INFO L495 AbstractCegarLoop]: Abstraction has 214616 states and 237175 transitions. [2022-07-19 12:23:52,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 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) [2022-07-19 12:23:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 214616 states and 237175 transitions. [2022-07-19 12:23:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-07-19 12:23:52,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:52,452 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:23:52,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 12:23:52,452 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:52,453 INFO L85 PathProgramCache]: Analyzing trace with hash -339615217, now seen corresponding path program 1 times [2022-07-19 12:23:52,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:52,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761831983] [2022-07-19 12:23:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 360 proven. 110 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 12:23:52,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:52,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761831983] [2022-07-19 12:23:52,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761831983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:23:52,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951746084] [2022-07-19 12:23:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:52,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:23:52,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:23:52,714 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:23:52,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:23:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:52,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:23:52,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:23:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-19 12:23:52,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:23:52,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951746084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:52,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:23:52,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-19 12:23:52,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372082622] [2022-07-19 12:23:52,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:52,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:52,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:52,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:52,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:23:52,897 INFO L87 Difference]: Start difference. First operand 214616 states and 237175 transitions. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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) [2022-07-19 12:23:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:57,551 INFO L93 Difference]: Finished difference Result 463052 states and 513272 transitions. [2022-07-19 12:23:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:57,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 478 [2022-07-19 12:23:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:57,950 INFO L225 Difference]: With dead ends: 463052 [2022-07-19 12:23:57,950 INFO L226 Difference]: Without dead ends: 267336 [2022-07-19 12:23:58,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:23:58,092 INFO L413 NwaCegarLoop]: 1646 mSDtfsCounter, 937 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 3421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:58,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 1762 Invalid, 3421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [759 Valid, 2662 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-19 12:23:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267336 states. [2022-07-19 12:24:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267336 to 246068. [2022-07-19 12:24:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246068 states, 246067 states have (on average 1.0949660051937073) internal successors, (269435), 246067 states have internal predecessors, (269435), 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) [2022-07-19 12:24:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246068 states to 246068 states and 269435 transitions. [2022-07-19 12:24:01,815 INFO L78 Accepts]: Start accepts. Automaton has 246068 states and 269435 transitions. Word has length 478 [2022-07-19 12:24:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:24:01,815 INFO L495 AbstractCegarLoop]: Abstraction has 246068 states and 269435 transitions. [2022-07-19 12:24:01,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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) [2022-07-19 12:24:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 246068 states and 269435 transitions. [2022-07-19 12:24:01,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-07-19 12:24:01,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:24:01,828 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:24:01,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:24:02,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 12:24:02,068 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:24:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:24:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1020324039, now seen corresponding path program 1 times [2022-07-19 12:24:02,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:24:02,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802627720] [2022-07-19 12:24:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:02,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:24:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:24:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 623 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2022-07-19 12:24:02,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:24:02,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802627720] [2022-07-19 12:24:02,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802627720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:24:02,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:24:02,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:24:02,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601561279] [2022-07-19 12:24:02,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:24:02,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:24:02,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:24:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:24:02,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:24:02,194 INFO L87 Difference]: Start difference. First operand 246068 states and 269435 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2022-07-19 12:24:06,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:24:06,208 INFO L93 Difference]: Finished difference Result 490563 states and 537091 transitions. [2022-07-19 12:24:06,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:24:06,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 519 [2022-07-19 12:24:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:24:06,571 INFO L225 Difference]: With dead ends: 490563 [2022-07-19 12:24:06,571 INFO L226 Difference]: Without dead ends: 245284 [2022-07-19 12:24:06,682 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 [2022-07-19 12:24:06,683 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 926 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:24:06,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 702 Invalid, 3072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:24:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245284 states. [2022-07-19 12:24:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245284 to 243687. [2022-07-19 12:24:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243687 states, 243686 states have (on average 1.0802713327807096) internal successors, (263247), 243686 states have internal predecessors, (263247), 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) [2022-07-19 12:24:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243687 states to 243687 states and 263247 transitions. [2022-07-19 12:24:09,980 INFO L78 Accepts]: Start accepts. Automaton has 243687 states and 263247 transitions. Word has length 519 [2022-07-19 12:24:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:24:09,981 INFO L495 AbstractCegarLoop]: Abstraction has 243687 states and 263247 transitions. [2022-07-19 12:24:09,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2022-07-19 12:24:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 243687 states and 263247 transitions. [2022-07-19 12:24:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2022-07-19 12:24:10,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:24:10,001 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:24:10,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:24:10,001 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:24:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:24:10,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1949809512, now seen corresponding path program 1 times [2022-07-19 12:24:10,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:24:10,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049277231] [2022-07-19 12:24:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:10,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:24:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat