./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/Problem03_label27.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 497301b92ba25c2f1607465beb3fb2acf88756e6c4b878ac8a9bf2f715106635 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:47:09,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:47:09,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:47:09,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:47:09,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:47:09,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:47:09,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:47:09,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:47:09,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:47:09,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:47:09,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:47:09,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:47:09,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:47:09,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:47:09,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:47:09,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:47:09,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:47:09,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:47:09,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:47:09,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:47:09,481 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:47:09,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:47:09,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:47:09,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:47:09,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:47:09,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:47:09,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:47:09,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:47:09,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:47:09,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:47:09,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:47:09,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:47:09,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:47:09,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:47:09,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:47:09,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:47:09,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:47:09,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:47:09,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:47:09,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:47:09,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:47:09,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:47:09,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:47:09,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:47:09,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:47:09,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:47:09,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:47:09,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:47:09,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:47:09,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:47:09,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:47:09,540 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:47:09,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:47:09,541 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:47:09,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:47:09,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:47:09,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:47:09,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:47:09,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:47:09,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:47:09,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:47:09,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:47:09,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:47:09,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:47:09,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:47:09,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:47:09,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:47:09,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:47:09,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:47:09,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:47:09,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:47:09,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:47:09,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:47:09,544 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:47:09,545 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:47:09,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:47:09,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497301b92ba25c2f1607465beb3fb2acf88756e6c4b878ac8a9bf2f715106635 [2022-07-20 22:47:09,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:47:09,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:47:09,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:47:09,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:47:09,879 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:47:09,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label27.c [2022-07-20 22:47:09,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a983d6a4b/8fe35617becf44808e05241d89891311/FLAG5f9981a9c [2022-07-20 22:47:10,477 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:47:10,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label27.c [2022-07-20 22:47:10,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a983d6a4b/8fe35617becf44808e05241d89891311/FLAG5f9981a9c [2022-07-20 22:47:10,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a983d6a4b/8fe35617becf44808e05241d89891311 [2022-07-20 22:47:10,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:47:10,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:47:10,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:47:10,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:47:10,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:47:10,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:47:10" (1/1) ... [2022-07-20 22:47:10,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb1e737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:10, skipping insertion in model container [2022-07-20 22:47:10,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:47:10" (1/1) ... [2022-07-20 22:47:10,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:47:10,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:47:11,279 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/Problem03_label27.c[54867,54880] [2022-07-20 22:47:11,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:47:11,321 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:47:11,471 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/Problem03_label27.c[54867,54880] [2022-07-20 22:47:11,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:47:11,501 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:47:11,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11 WrapperNode [2022-07-20 22:47:11,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:47:11,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:47:11,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:47:11,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:47:11,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,596 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-20 22:47:11,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:47:11,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:47:11,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:47:11,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:47:11,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:47:11,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:47:11,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:47:11,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:47:11,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:47:11,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:11,757 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) [2022-07-20 22:47:11,766 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 [2022-07-20 22:47:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:47:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:47:11,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:47:11,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:47:11,844 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:47:11,846 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:47:13,077 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:47:13,083 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:47:13,084 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 22:47:13,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:47:13 BoogieIcfgContainer [2022-07-20 22:47:13,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:47:13,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:47:13,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:47:13,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:47:13,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:47:10" (1/3) ... [2022-07-20 22:47:13,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e45eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:47:13, skipping insertion in model container [2022-07-20 22:47:13,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11" (2/3) ... [2022-07-20 22:47:13,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e45eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:47:13, skipping insertion in model container [2022-07-20 22:47:13,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:47:13" (3/3) ... [2022-07-20 22:47:13,091 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label27.c [2022-07-20 22:47:13,101 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:47:13,101 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:47:13,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:47:13,140 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@3d33e0d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@17075bb6 [2022-07-20 22:47:13,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:47:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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) [2022-07-20 22:47:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-20 22:47:13,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:13,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:13,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:13,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:13,160 INFO L85 PathProgramCache]: Analyzing trace with hash 142773979, now seen corresponding path program 1 times [2022-07-20 22:47:13,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:13,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80358792] [2022-07-20 22:47:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:13,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:13,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:13,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80358792] [2022-07-20 22:47:13,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80358792] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:13,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:13,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:13,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354970769] [2022-07-20 22:47:13,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:13,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:13,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:13,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:13,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:13,601 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-07-20 22:47:14,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:14,593 INFO L93 Difference]: Finished difference Result 843 states and 1493 transitions. [2022-07-20 22:47:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:14,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 153 [2022-07-20 22:47:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:14,605 INFO L225 Difference]: With dead ends: 843 [2022-07-20 22:47:14,605 INFO L226 Difference]: Without dead ends: 463 [2022-07-20 22:47:14,608 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 [2022-07-20 22:47:14,611 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 121 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:14,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 121 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:47:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-07-20 22:47:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2022-07-20 22:47:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6339285714285714) internal successors, (732), 448 states have internal predecessors, (732), 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) [2022-07-20 22:47:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 732 transitions. [2022-07-20 22:47:14,651 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 732 transitions. Word has length 153 [2022-07-20 22:47:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:14,651 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 732 transitions. [2022-07-20 22:47:14,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-07-20 22:47:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 732 transitions. [2022-07-20 22:47:14,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-20 22:47:14,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:14,654 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 22:47:14,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:47:14,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:14,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:14,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2106460879, now seen corresponding path program 1 times [2022-07-20 22:47:14,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:14,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775943890] [2022-07-20 22:47:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:14,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:14,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:14,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775943890] [2022-07-20 22:47:14,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775943890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:14,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:14,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:14,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992842860] [2022-07-20 22:47:14,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:14,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:14,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:14,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:14,721 INFO L87 Difference]: Start difference. First operand 449 states and 732 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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) [2022-07-20 22:47:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:15,281 INFO L93 Difference]: Finished difference Result 1333 states and 2180 transitions. [2022-07-20 22:47:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:15,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 159 [2022-07-20 22:47:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:15,284 INFO L225 Difference]: With dead ends: 1333 [2022-07-20 22:47:15,285 INFO L226 Difference]: Without dead ends: 886 [2022-07-20 22:47:15,286 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 [2022-07-20 22:47:15,286 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:15,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 114 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-07-20 22:47:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 882. [2022-07-20 22:47:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 1.6163450624290578) internal successors, (1424), 881 states have internal predecessors, (1424), 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) [2022-07-20 22:47:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1424 transitions. [2022-07-20 22:47:15,308 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1424 transitions. Word has length 159 [2022-07-20 22:47:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:15,308 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1424 transitions. [2022-07-20 22:47:15,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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) [2022-07-20 22:47:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1424 transitions. [2022-07-20 22:47:15,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-20 22:47:15,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:15,312 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 22:47:15,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:47:15,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash 935769591, now seen corresponding path program 1 times [2022-07-20 22:47:15,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:15,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063151471] [2022-07-20 22:47:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:15,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:15,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063151471] [2022-07-20 22:47:15,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063151471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:15,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:15,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:15,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194364991] [2022-07-20 22:47:15,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:15,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:15,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:15,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:15,365 INFO L87 Difference]: Start difference. First operand 882 states and 1424 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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) [2022-07-20 22:47:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:15,919 INFO L93 Difference]: Finished difference Result 2575 states and 4172 transitions. [2022-07-20 22:47:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:15,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 159 [2022-07-20 22:47:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:15,925 INFO L225 Difference]: With dead ends: 2575 [2022-07-20 22:47:15,925 INFO L226 Difference]: Without dead ends: 1695 [2022-07-20 22:47:15,927 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 [2022-07-20 22:47:15,927 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 214 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:15,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 194 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-07-20 22:47:15,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1695. [2022-07-20 22:47:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 1.39728453364817) internal successors, (2367), 1694 states have internal predecessors, (2367), 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) [2022-07-20 22:47:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2367 transitions. [2022-07-20 22:47:15,989 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2367 transitions. Word has length 159 [2022-07-20 22:47:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:15,990 INFO L495 AbstractCegarLoop]: Abstraction has 1695 states and 2367 transitions. [2022-07-20 22:47:15,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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) [2022-07-20 22:47:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2367 transitions. [2022-07-20 22:47:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-20 22:47:15,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:15,995 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:15,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:47:15,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:16,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1461731664, now seen corresponding path program 1 times [2022-07-20 22:47:16,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:16,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831698528] [2022-07-20 22:47:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:16,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:47:16,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:16,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831698528] [2022-07-20 22:47:16,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831698528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:16,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:16,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105970354] [2022-07-20 22:47:16,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:16,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:16,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:16,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:16,098 INFO L87 Difference]: Start difference. First operand 1695 states and 2367 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-07-20 22:47:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:16,756 INFO L93 Difference]: Finished difference Result 4840 states and 6821 transitions. [2022-07-20 22:47:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:16,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 167 [2022-07-20 22:47:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:16,766 INFO L225 Difference]: With dead ends: 4840 [2022-07-20 22:47:16,766 INFO L226 Difference]: Without dead ends: 3147 [2022-07-20 22:47:16,768 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 [2022-07-20 22:47:16,775 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:16,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2022-07-20 22:47:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3123. [2022-07-20 22:47:16,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 1.3837283792440742) internal successors, (4320), 3122 states have internal predecessors, (4320), 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) [2022-07-20 22:47:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 4320 transitions. [2022-07-20 22:47:16,858 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 4320 transitions. Word has length 167 [2022-07-20 22:47:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:16,858 INFO L495 AbstractCegarLoop]: Abstraction has 3123 states and 4320 transitions. [2022-07-20 22:47:16,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-07-20 22:47:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 4320 transitions. [2022-07-20 22:47:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-20 22:47:16,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:16,863 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:16,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:47:16,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:16,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1505619899, now seen corresponding path program 1 times [2022-07-20 22:47:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:16,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499796184] [2022-07-20 22:47:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:47:16,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:16,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499796184] [2022-07-20 22:47:16,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499796184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:16,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:16,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:16,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719168018] [2022-07-20 22:47:16,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:16,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:16,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:16,923 INFO L87 Difference]: Start difference. First operand 3123 states and 4320 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2022-07-20 22:47:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:17,542 INFO L93 Difference]: Finished difference Result 8695 states and 12189 transitions. [2022-07-20 22:47:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:17,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 174 [2022-07-20 22:47:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:17,559 INFO L225 Difference]: With dead ends: 8695 [2022-07-20 22:47:17,560 INFO L226 Difference]: Without dead ends: 5574 [2022-07-20 22:47:17,564 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 [2022-07-20 22:47:17,564 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:17,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 367 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2022-07-20 22:47:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 5568. [2022-07-20 22:47:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5568 states, 5567 states have (on average 1.3175857733069876) internal successors, (7335), 5567 states have internal predecessors, (7335), 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) [2022-07-20 22:47:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5568 states to 5568 states and 7335 transitions. [2022-07-20 22:47:17,649 INFO L78 Accepts]: Start accepts. Automaton has 5568 states and 7335 transitions. Word has length 174 [2022-07-20 22:47:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:17,650 INFO L495 AbstractCegarLoop]: Abstraction has 5568 states and 7335 transitions. [2022-07-20 22:47:17,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2022-07-20 22:47:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5568 states and 7335 transitions. [2022-07-20 22:47:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-20 22:47:17,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:17,657 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:17,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:47:17,657 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:17,658 INFO L85 PathProgramCache]: Analyzing trace with hash 35032041, now seen corresponding path program 1 times [2022-07-20 22:47:17,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:17,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10494230] [2022-07-20 22:47:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:17,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:47:17,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10494230] [2022-07-20 22:47:17,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10494230] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:17,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:17,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:17,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635698299] [2022-07-20 22:47:17,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:17,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:17,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:17,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:17,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:17,715 INFO L87 Difference]: Start difference. First operand 5568 states and 7335 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2022-07-20 22:47:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:18,346 INFO L93 Difference]: Finished difference Result 13180 states and 17448 transitions. [2022-07-20 22:47:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 181 [2022-07-20 22:47:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:18,367 INFO L225 Difference]: With dead ends: 13180 [2022-07-20 22:47:18,367 INFO L226 Difference]: Without dead ends: 7614 [2022-07-20 22:47:18,374 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 [2022-07-20 22:47:18,375 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 214 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:18,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 370 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7614 states. [2022-07-20 22:47:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7614 to 7600. [2022-07-20 22:47:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7600 states, 7599 states have (on average 1.2793788656402159) internal successors, (9722), 7599 states have internal predecessors, (9722), 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) [2022-07-20 22:47:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7600 states to 7600 states and 9722 transitions. [2022-07-20 22:47:18,532 INFO L78 Accepts]: Start accepts. Automaton has 7600 states and 9722 transitions. Word has length 181 [2022-07-20 22:47:18,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:18,533 INFO L495 AbstractCegarLoop]: Abstraction has 7600 states and 9722 transitions. [2022-07-20 22:47:18,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2022-07-20 22:47:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 7600 states and 9722 transitions. [2022-07-20 22:47:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-20 22:47:18,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:18,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:18,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:47:18,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:18,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:18,541 INFO L85 PathProgramCache]: Analyzing trace with hash -965477835, now seen corresponding path program 1 times [2022-07-20 22:47:18,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:18,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22089800] [2022-07-20 22:47:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:18,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:18,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:18,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22089800] [2022-07-20 22:47:18,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22089800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:18,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:18,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:18,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580936336] [2022-07-20 22:47:18,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:18,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:18,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:18,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:18,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:18,597 INFO L87 Difference]: Start difference. First operand 7600 states and 9722 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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) [2022-07-20 22:47:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:19,279 INFO L93 Difference]: Finished difference Result 21734 states and 27873 transitions. [2022-07-20 22:47:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:19,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 181 [2022-07-20 22:47:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:19,311 INFO L225 Difference]: With dead ends: 21734 [2022-07-20 22:47:19,311 INFO L226 Difference]: Without dead ends: 14136 [2022-07-20 22:47:19,320 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 [2022-07-20 22:47:19,320 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:19,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 165 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14136 states. [2022-07-20 22:47:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14136 to 14121. [2022-07-20 22:47:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14121 states, 14120 states have (on average 1.2487252124645893) internal successors, (17632), 14120 states have internal predecessors, (17632), 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) [2022-07-20 22:47:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14121 states to 14121 states and 17632 transitions. [2022-07-20 22:47:19,603 INFO L78 Accepts]: Start accepts. Automaton has 14121 states and 17632 transitions. Word has length 181 [2022-07-20 22:47:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:19,603 INFO L495 AbstractCegarLoop]: Abstraction has 14121 states and 17632 transitions. [2022-07-20 22:47:19,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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) [2022-07-20 22:47:19,604 INFO L276 IsEmpty]: Start isEmpty. Operand 14121 states and 17632 transitions. [2022-07-20 22:47:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-20 22:47:19,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:19,617 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:19,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:47:19,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:19,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:19,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1622089593, now seen corresponding path program 1 times [2022-07-20 22:47:19,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:19,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114090971] [2022-07-20 22:47:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:19,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 22:47:19,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:19,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114090971] [2022-07-20 22:47:19,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114090971] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:19,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:19,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817372476] [2022-07-20 22:47:19,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:19,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:19,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:19,666 INFO L87 Difference]: Start difference. First operand 14121 states and 17632 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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) [2022-07-20 22:47:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:20,297 INFO L93 Difference]: Finished difference Result 38017 states and 47780 transitions. [2022-07-20 22:47:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:20,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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 194 [2022-07-20 22:47:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:20,337 INFO L225 Difference]: With dead ends: 38017 [2022-07-20 22:47:20,337 INFO L226 Difference]: Without dead ends: 24101 [2022-07-20 22:47:20,354 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 [2022-07-20 22:47:20,354 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 243 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:20,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 182 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24101 states. [2022-07-20 22:47:20,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24101 to 23891. [2022-07-20 22:47:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23891 states, 23890 states have (on average 1.2258685642528255) internal successors, (29286), 23890 states have internal predecessors, (29286), 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) [2022-07-20 22:47:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23891 states to 23891 states and 29286 transitions. [2022-07-20 22:47:20,705 INFO L78 Accepts]: Start accepts. Automaton has 23891 states and 29286 transitions. Word has length 194 [2022-07-20 22:47:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:20,705 INFO L495 AbstractCegarLoop]: Abstraction has 23891 states and 29286 transitions. [2022-07-20 22:47:20,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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) [2022-07-20 22:47:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 23891 states and 29286 transitions. [2022-07-20 22:47:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-20 22:47:20,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:20,721 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:20,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:47:20,722 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:20,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:20,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1362239058, now seen corresponding path program 1 times [2022-07-20 22:47:20,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:20,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443943783] [2022-07-20 22:47:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:20,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:20,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:20,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443943783] [2022-07-20 22:47:20,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443943783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:20,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:20,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:20,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136483883] [2022-07-20 22:47:20,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:20,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:47:20,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:20,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:47:20,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:20,788 INFO L87 Difference]: Start difference. First operand 23891 states and 29286 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 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) [2022-07-20 22:47:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:21,876 INFO L93 Difference]: Finished difference Result 47623 states and 58441 transitions. [2022-07-20 22:47:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:47:21,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 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 197 [2022-07-20 22:47:21,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:21,916 INFO L225 Difference]: With dead ends: 47623 [2022-07-20 22:47:21,916 INFO L226 Difference]: Without dead ends: 23937 [2022-07-20 22:47:21,939 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 [2022-07-20 22:47:21,939 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 409 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:21,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 173 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:47:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23937 states. [2022-07-20 22:47:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23937 to 23079. [2022-07-20 22:47:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23079 states, 23078 states have (on average 1.2251061617124535) internal successors, (28273), 23078 states have internal predecessors, (28273), 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) [2022-07-20 22:47:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23079 states to 23079 states and 28273 transitions. [2022-07-20 22:47:22,270 INFO L78 Accepts]: Start accepts. Automaton has 23079 states and 28273 transitions. Word has length 197 [2022-07-20 22:47:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:22,272 INFO L495 AbstractCegarLoop]: Abstraction has 23079 states and 28273 transitions. [2022-07-20 22:47:22,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 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) [2022-07-20 22:47:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 23079 states and 28273 transitions. [2022-07-20 22:47:22,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-20 22:47:22,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:22,288 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:22,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:47:22,288 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:22,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:22,289 INFO L85 PathProgramCache]: Analyzing trace with hash -501557789, now seen corresponding path program 1 times [2022-07-20 22:47:22,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:22,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069378216] [2022-07-20 22:47:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:22,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:47:22,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069378216] [2022-07-20 22:47:22,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069378216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949536836] [2022-07-20 22:47:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:22,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:22,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:22,397 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) [2022-07-20 22:47:22,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:47:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:22,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:22,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:47:22,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:22,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949536836] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:22,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:22,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:22,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275878541] [2022-07-20 22:47:22,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:22,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:22,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:22,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:22,832 INFO L87 Difference]: Start difference. First operand 23079 states and 28273 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) 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) [2022-07-20 22:47:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:23,639 INFO L93 Difference]: Finished difference Result 44166 states and 54224 transitions. [2022-07-20 22:47:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) 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 204 [2022-07-20 22:47:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:23,676 INFO L225 Difference]: With dead ends: 44166 [2022-07-20 22:47:23,676 INFO L226 Difference]: Without dead ends: 21292 [2022-07-20 22:47:23,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:23,695 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 85 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:23,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 390 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:23,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21292 states. [2022-07-20 22:47:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21292 to 21252. [2022-07-20 22:47:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21252 states, 21251 states have (on average 1.2106253823349489) internal successors, (25727), 21251 states have internal predecessors, (25727), 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) [2022-07-20 22:47:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21252 states to 21252 states and 25727 transitions. [2022-07-20 22:47:24,020 INFO L78 Accepts]: Start accepts. Automaton has 21252 states and 25727 transitions. Word has length 204 [2022-07-20 22:47:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:24,020 INFO L495 AbstractCegarLoop]: Abstraction has 21252 states and 25727 transitions. [2022-07-20 22:47:24,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) 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) [2022-07-20 22:47:24,021 INFO L276 IsEmpty]: Start isEmpty. Operand 21252 states and 25727 transitions. [2022-07-20 22:47:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-20 22:47:24,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:24,035 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:24,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:24,257 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 [2022-07-20 22:47:24,257 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2066787412, now seen corresponding path program 1 times [2022-07-20 22:47:24,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:24,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18904153] [2022-07-20 22:47:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:24,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 22:47:24,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18904153] [2022-07-20 22:47:24,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18904153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:24,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:24,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:24,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158432736] [2022-07-20 22:47:24,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:24,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:24,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:24,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:24,352 INFO L87 Difference]: Start difference. First operand 21252 states and 25727 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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) [2022-07-20 22:47:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:25,199 INFO L93 Difference]: Finished difference Result 49263 states and 60005 transitions. [2022-07-20 22:47:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 211 [2022-07-20 22:47:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:25,234 INFO L225 Difference]: With dead ends: 49263 [2022-07-20 22:47:25,234 INFO L226 Difference]: Without dead ends: 28216 [2022-07-20 22:47:25,245 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 [2022-07-20 22:47:25,246 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:25,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 243 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28216 states. [2022-07-20 22:47:25,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28216 to 28177. [2022-07-20 22:47:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28177 states, 28176 states have (on average 1.2191936399772856) internal successors, (34352), 28176 states have internal predecessors, (34352), 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) [2022-07-20 22:47:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28177 states to 28177 states and 34352 transitions. [2022-07-20 22:47:25,554 INFO L78 Accepts]: Start accepts. Automaton has 28177 states and 34352 transitions. Word has length 211 [2022-07-20 22:47:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:25,555 INFO L495 AbstractCegarLoop]: Abstraction has 28177 states and 34352 transitions. [2022-07-20 22:47:25,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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) [2022-07-20 22:47:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 28177 states and 34352 transitions. [2022-07-20 22:47:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-20 22:47:25,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:25,572 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, 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] [2022-07-20 22:47:25,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 22:47:25,573 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:25,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:25,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2140922914, now seen corresponding path program 1 times [2022-07-20 22:47:25,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:25,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975115024] [2022-07-20 22:47:25,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:25,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 22:47:25,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:25,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975115024] [2022-07-20 22:47:25,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975115024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:25,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:25,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:25,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444657875] [2022-07-20 22:47:25,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:25,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:25,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:25,637 INFO L87 Difference]: Start difference. First operand 28177 states and 34352 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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) [2022-07-20 22:47:26,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:26,503 INFO L93 Difference]: Finished difference Result 76959 states and 94133 transitions. [2022-07-20 22:47:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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 215 [2022-07-20 22:47:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:26,579 INFO L225 Difference]: With dead ends: 76959 [2022-07-20 22:47:26,580 INFO L226 Difference]: Without dead ends: 49190 [2022-07-20 22:47:26,639 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 [2022-07-20 22:47:26,640 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:26,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 227 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49190 states. [2022-07-20 22:47:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49190 to 49173. [2022-07-20 22:47:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49173 states, 49172 states have (on average 1.217623850972098) internal successors, (59873), 49172 states have internal predecessors, (59873), 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) [2022-07-20 22:47:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49173 states to 49173 states and 59873 transitions. [2022-07-20 22:47:27,534 INFO L78 Accepts]: Start accepts. Automaton has 49173 states and 59873 transitions. Word has length 215 [2022-07-20 22:47:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:27,534 INFO L495 AbstractCegarLoop]: Abstraction has 49173 states and 59873 transitions. [2022-07-20 22:47:27,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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) [2022-07-20 22:47:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 49173 states and 59873 transitions. [2022-07-20 22:47:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-20 22:47:27,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:27,557 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:27,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:47:27,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:27,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:27,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1187482030, now seen corresponding path program 1 times [2022-07-20 22:47:27,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:27,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966487507] [2022-07-20 22:47:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:27,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:47:27,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966487507] [2022-07-20 22:47:27,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966487507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:27,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:27,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:27,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604680101] [2022-07-20 22:47:27,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:27,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:27,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:27,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:27,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:27,635 INFO L87 Difference]: Start difference. First operand 49173 states and 59873 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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) [2022-07-20 22:47:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:28,692 INFO L93 Difference]: Finished difference Result 97096 states and 119570 transitions. [2022-07-20 22:47:28,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:28,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 219 [2022-07-20 22:47:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:28,765 INFO L225 Difference]: With dead ends: 97096 [2022-07-20 22:47:28,766 INFO L226 Difference]: Without dead ends: 48737 [2022-07-20 22:47:28,795 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 [2022-07-20 22:47:28,796 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 192 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:28,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 399 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48737 states. [2022-07-20 22:47:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48737 to 45075. [2022-07-20 22:47:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45075 states, 45074 states have (on average 1.1810578160358522) internal successors, (53235), 45074 states have internal predecessors, (53235), 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) [2022-07-20 22:47:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45075 states to 45075 states and 53235 transitions. [2022-07-20 22:47:29,494 INFO L78 Accepts]: Start accepts. Automaton has 45075 states and 53235 transitions. Word has length 219 [2022-07-20 22:47:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:29,495 INFO L495 AbstractCegarLoop]: Abstraction has 45075 states and 53235 transitions. [2022-07-20 22:47:29,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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) [2022-07-20 22:47:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45075 states and 53235 transitions. [2022-07-20 22:47:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-20 22:47:29,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:29,531 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:29,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:47:29,531 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1055581501, now seen corresponding path program 1 times [2022-07-20 22:47:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:29,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432345821] [2022-07-20 22:47:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-20 22:47:29,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:29,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432345821] [2022-07-20 22:47:29,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432345821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:29,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620130519] [2022-07-20 22:47:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:29,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:29,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:29,684 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) [2022-07-20 22:47:29,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:47:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:29,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:29,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:47:29,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:29,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620130519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:29,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:29,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:29,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803196201] [2022-07-20 22:47:29,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:29,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:29,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:29,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:29,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:29,863 INFO L87 Difference]: Start difference. First operand 45075 states and 53235 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2022-07-20 22:47:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:30,403 INFO L93 Difference]: Finished difference Result 99313 states and 117806 transitions. [2022-07-20 22:47:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:30,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 232 [2022-07-20 22:47:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:30,491 INFO L225 Difference]: With dead ends: 99313 [2022-07-20 22:47:30,492 INFO L226 Difference]: Without dead ends: 69934 [2022-07-20 22:47:30,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:30,523 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 303 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:30,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 882 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:47:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69934 states. [2022-07-20 22:47:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69934 to 67084. [2022-07-20 22:47:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67084 states, 67083 states have (on average 1.1766766542939344) internal successors, (78935), 67083 states have internal predecessors, (78935), 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) [2022-07-20 22:47:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67084 states to 67084 states and 78935 transitions. [2022-07-20 22:47:31,502 INFO L78 Accepts]: Start accepts. Automaton has 67084 states and 78935 transitions. Word has length 232 [2022-07-20 22:47:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:31,502 INFO L495 AbstractCegarLoop]: Abstraction has 67084 states and 78935 transitions. [2022-07-20 22:47:31,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2022-07-20 22:47:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 67084 states and 78935 transitions. [2022-07-20 22:47:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-20 22:47:31,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:31,525 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2022-07-20 22:47:31,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:31,743 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,SelfDestructingSolverStorable13 [2022-07-20 22:47:31,743 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1624564468, now seen corresponding path program 1 times [2022-07-20 22:47:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018700851] [2022-07-20 22:47:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:31,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-20 22:47:31,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018700851] [2022-07-20 22:47:31,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018700851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167127660] [2022-07-20 22:47:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:31,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:31,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:31,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:47:31,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:47:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:32,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:32,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-20 22:47:32,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:32,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167127660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:32,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:32,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:32,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388905483] [2022-07-20 22:47:32,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:32,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:32,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:32,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:32,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:32,166 INFO L87 Difference]: Start difference. First operand 67084 states and 78935 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2022-07-20 22:47:33,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:33,241 INFO L93 Difference]: Finished difference Result 148051 states and 174928 transitions. [2022-07-20 22:47:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:33,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 238 [2022-07-20 22:47:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:33,369 INFO L225 Difference]: With dead ends: 148051 [2022-07-20 22:47:33,369 INFO L226 Difference]: Without dead ends: 82801 [2022-07-20 22:47:33,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:33,421 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 92 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:33,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 181 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:47:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82801 states. [2022-07-20 22:47:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82801 to 78452. [2022-07-20 22:47:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78452 states, 78451 states have (on average 1.1798702374730723) internal successors, (92562), 78451 states have internal predecessors, (92562), 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) [2022-07-20 22:47:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78452 states to 78452 states and 92562 transitions. [2022-07-20 22:47:34,694 INFO L78 Accepts]: Start accepts. Automaton has 78452 states and 92562 transitions. Word has length 238 [2022-07-20 22:47:34,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:34,694 INFO L495 AbstractCegarLoop]: Abstraction has 78452 states and 92562 transitions. [2022-07-20 22:47:34,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2022-07-20 22:47:34,694 INFO L276 IsEmpty]: Start isEmpty. Operand 78452 states and 92562 transitions. [2022-07-20 22:47:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-07-20 22:47:34,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:34,728 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:34,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-20 22:47:34,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:34,951 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:34,952 INFO L85 PathProgramCache]: Analyzing trace with hash -143005526, now seen corresponding path program 1 times [2022-07-20 22:47:34,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:34,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713966847] [2022-07-20 22:47:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:34,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-20 22:47:35,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:35,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713966847] [2022-07-20 22:47:35,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713966847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:35,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:35,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:35,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787185373] [2022-07-20 22:47:35,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:35,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:47:35,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:47:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:35,023 INFO L87 Difference]: Start difference. First operand 78452 states and 92562 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:36,303 INFO L93 Difference]: Finished difference Result 141519 states and 166560 transitions. [2022-07-20 22:47:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:47:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2022-07-20 22:47:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:36,377 INFO L225 Difference]: With dead ends: 141519 [2022-07-20 22:47:36,377 INFO L226 Difference]: Without dead ends: 61243 [2022-07-20 22:47:36,421 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 [2022-07-20 22:47:36,421 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 562 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:36,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 55 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:47:36,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61243 states. [2022-07-20 22:47:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61243 to 49850. [2022-07-20 22:47:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49850 states, 49849 states have (on average 1.1023290336817189) internal successors, (54950), 49849 states have internal predecessors, (54950), 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) [2022-07-20 22:47:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49850 states to 49850 states and 54950 transitions. [2022-07-20 22:47:37,520 INFO L78 Accepts]: Start accepts. Automaton has 49850 states and 54950 transitions. Word has length 247 [2022-07-20 22:47:37,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:37,521 INFO L495 AbstractCegarLoop]: Abstraction has 49850 states and 54950 transitions. [2022-07-20 22:47:37,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand 49850 states and 54950 transitions. [2022-07-20 22:47:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-20 22:47:37,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:37,538 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 22:47:37,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 22:47:37,539 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:37,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1724273175, now seen corresponding path program 1 times [2022-07-20 22:47:37,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:37,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958048638] [2022-07-20 22:47:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:37,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:37,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:37,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958048638] [2022-07-20 22:47:37,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958048638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:37,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:37,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:37,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155567942] [2022-07-20 22:47:37,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:37,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:37,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:37,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:37,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:37,735 INFO L87 Difference]: Start difference. First operand 49850 states and 54950 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:38,342 INFO L93 Difference]: Finished difference Result 94599 states and 104282 transitions. [2022-07-20 22:47:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-07-20 22:47:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:38,396 INFO L225 Difference]: With dead ends: 94599 [2022-07-20 22:47:38,397 INFO L226 Difference]: Without dead ends: 44346 [2022-07-20 22:47:38,430 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 [2022-07-20 22:47:38,431 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 207 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:38,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 299 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:47:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44346 states. [2022-07-20 22:47:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44346 to 39468. [2022-07-20 22:47:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39468 states, 39467 states have (on average 1.0757341576506956) internal successors, (42456), 39467 states have internal predecessors, (42456), 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) [2022-07-20 22:47:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39468 states to 39468 states and 42456 transitions. [2022-07-20 22:47:39,106 INFO L78 Accepts]: Start accepts. Automaton has 39468 states and 42456 transitions. Word has length 255 [2022-07-20 22:47:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:39,106 INFO L495 AbstractCegarLoop]: Abstraction has 39468 states and 42456 transitions. [2022-07-20 22:47:39,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 39468 states and 42456 transitions. [2022-07-20 22:47:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-20 22:47:39,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:39,118 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:39,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:47:39,118 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:39,119 INFO L85 PathProgramCache]: Analyzing trace with hash -766676392, now seen corresponding path program 1 times [2022-07-20 22:47:39,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:39,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632024658] [2022-07-20 22:47:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:39,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:39,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:39,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632024658] [2022-07-20 22:47:39,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632024658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:39,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:39,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:39,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146497319] [2022-07-20 22:47:39,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:39,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:47:39,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:47:39,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:39,309 INFO L87 Difference]: Start difference. First operand 39468 states and 42456 transitions. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:40,228 INFO L93 Difference]: Finished difference Result 75906 states and 81790 transitions. [2022-07-20 22:47:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:47:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-07-20 22:47:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:40,277 INFO L225 Difference]: With dead ends: 75906 [2022-07-20 22:47:40,278 INFO L226 Difference]: Without dead ends: 40917 [2022-07-20 22:47:40,510 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 [2022-07-20 22:47:40,512 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 339 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:40,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 97 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:47:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40917 states. [2022-07-20 22:47:40,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40917 to 39676. [2022-07-20 22:47:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39676 states, 39675 states have (on average 1.0752362948960303) internal successors, (42660), 39675 states have internal predecessors, (42660), 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) [2022-07-20 22:47:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39676 states to 39676 states and 42660 transitions. [2022-07-20 22:47:40,880 INFO L78 Accepts]: Start accepts. Automaton has 39676 states and 42660 transitions. Word has length 255 [2022-07-20 22:47:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:40,881 INFO L495 AbstractCegarLoop]: Abstraction has 39676 states and 42660 transitions. [2022-07-20 22:47:40,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 39676 states and 42660 transitions. [2022-07-20 22:47:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-07-20 22:47:40,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:40,895 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 22:47:40,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:47:40,897 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:40,898 INFO L85 PathProgramCache]: Analyzing trace with hash 139945510, now seen corresponding path program 1 times [2022-07-20 22:47:40,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:40,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629397122] [2022-07-20 22:47:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:40,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:40,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:40,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629397122] [2022-07-20 22:47:40,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629397122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:40,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:40,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:40,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215873469] [2022-07-20 22:47:40,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:40,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:40,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:40,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:40,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:40,990 INFO L87 Difference]: Start difference. First operand 39676 states and 42660 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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) [2022-07-20 22:47:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:41,748 INFO L93 Difference]: Finished difference Result 83003 states and 89273 transitions. [2022-07-20 22:47:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:41,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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 282 [2022-07-20 22:47:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:41,803 INFO L225 Difference]: With dead ends: 83003 [2022-07-20 22:47:41,803 INFO L226 Difference]: Without dead ends: 47193 [2022-07-20 22:47:41,825 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 [2022-07-20 22:47:41,826 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 202 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:41,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 303 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:47:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47193 states. [2022-07-20 22:47:42,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47193 to 43739. [2022-07-20 22:47:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43739 states, 43738 states have (on average 1.0626000274360967) internal successors, (46476), 43738 states have internal predecessors, (46476), 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) [2022-07-20 22:47:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43739 states to 43739 states and 46476 transitions. [2022-07-20 22:47:42,497 INFO L78 Accepts]: Start accepts. Automaton has 43739 states and 46476 transitions. Word has length 282 [2022-07-20 22:47:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:42,498 INFO L495 AbstractCegarLoop]: Abstraction has 43739 states and 46476 transitions. [2022-07-20 22:47:42,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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) [2022-07-20 22:47:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 43739 states and 46476 transitions. [2022-07-20 22:47:42,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-07-20 22:47:42,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:42,519 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 22:47:42,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 22:47:42,520 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2064793023, now seen corresponding path program 1 times [2022-07-20 22:47:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478924121] [2022-07-20 22:47:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 166 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 22:47:42,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:42,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478924121] [2022-07-20 22:47:42,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478924121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:42,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389717934] [2022-07-20 22:47:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:42,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:42,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:42,755 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:47:42,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:47:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:42,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:42,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 22:47:43,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:43,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389717934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:43,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:43,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-20 22:47:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140910057] [2022-07-20 22:47:43,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:43,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:43,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:43,129 INFO L87 Difference]: Start difference. First operand 43739 states and 46476 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 2 states have internal predecessors, (279), 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) [2022-07-20 22:47:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:43,829 INFO L93 Difference]: Finished difference Result 92162 states and 97933 transitions. [2022-07-20 22:47:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:43,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 316 [2022-07-20 22:47:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:43,891 INFO L225 Difference]: With dead ends: 92162 [2022-07-20 22:47:43,892 INFO L226 Difference]: Without dead ends: 50459 [2022-07-20 22:47:43,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:43,923 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 132 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:43,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 80 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50459 states. [2022-07-20 22:47:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50459 to 45776. [2022-07-20 22:47:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45776 states, 45775 states have (on average 1.0570398689240852) internal successors, (48386), 45775 states have internal predecessors, (48386), 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) [2022-07-20 22:47:44,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45776 states to 45776 states and 48386 transitions. [2022-07-20 22:47:44,643 INFO L78 Accepts]: Start accepts. Automaton has 45776 states and 48386 transitions. Word has length 316 [2022-07-20 22:47:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:44,643 INFO L495 AbstractCegarLoop]: Abstraction has 45776 states and 48386 transitions. [2022-07-20 22:47:44,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 2 states have internal predecessors, (279), 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) [2022-07-20 22:47:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 45776 states and 48386 transitions. [2022-07-20 22:47:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-07-20 22:47:44,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:44,666 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:44,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:44,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:44,884 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash -253973518, now seen corresponding path program 1 times [2022-07-20 22:47:44,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:44,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241866766] [2022-07-20 22:47:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:44,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 250 proven. 6 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-07-20 22:47:45,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:45,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241866766] [2022-07-20 22:47:45,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241866766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:45,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370338019] [2022-07-20 22:47:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:45,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:45,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:45,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:47:45,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:47:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:45,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:45,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-07-20 22:47:45,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:45,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370338019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:45,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:45,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-20 22:47:45,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244351927] [2022-07-20 22:47:45,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:45,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:45,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:45,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:45,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:45,307 INFO L87 Difference]: Start difference. First operand 45776 states and 48386 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 2 states have internal predecessors, (281), 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) [2022-07-20 22:47:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:45,958 INFO L93 Difference]: Finished difference Result 127359 states and 134657 transitions. [2022-07-20 22:47:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 2 states have internal predecessors, (281), 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 389 [2022-07-20 22:47:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:46,059 INFO L225 Difference]: With dead ends: 127359 [2022-07-20 22:47:46,060 INFO L226 Difference]: Without dead ends: 83414 [2022-07-20 22:47:46,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:46,088 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 176 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:46,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 472 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:47:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83414 states. [2022-07-20 22:47:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83414 to 83409. [2022-07-20 22:47:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83409 states, 83408 states have (on average 1.056865048916171) internal successors, (88151), 83408 states have internal predecessors, (88151), 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) [2022-07-20 22:47:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83409 states to 83409 states and 88151 transitions. [2022-07-20 22:47:47,150 INFO L78 Accepts]: Start accepts. Automaton has 83409 states and 88151 transitions. Word has length 389 [2022-07-20 22:47:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:47,150 INFO L495 AbstractCegarLoop]: Abstraction has 83409 states and 88151 transitions. [2022-07-20 22:47:47,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 2 states have internal predecessors, (281), 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) [2022-07-20 22:47:47,151 INFO L276 IsEmpty]: Start isEmpty. Operand 83409 states and 88151 transitions. [2022-07-20 22:47:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-07-20 22:47:47,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:47,173 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:47,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:47,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:47,392 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:47,394 INFO L85 PathProgramCache]: Analyzing trace with hash 469348255, now seen corresponding path program 1 times [2022-07-20 22:47:47,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:47,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915752662] [2022-07-20 22:47:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:47,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 405 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 22:47:47,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915752662] [2022-07-20 22:47:47,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915752662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734988614] [2022-07-20 22:47:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:47,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:47,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:47,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:47:47,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:47:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:47,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-20 22:47:48,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:48,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734988614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:48,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:48,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-20 22:47:48,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140157459] [2022-07-20 22:47:48,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:48,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:48,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:48,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:48,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:48,020 INFO L87 Difference]: Start difference. First operand 83409 states and 88151 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 2 states have internal predecessors, (283), 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) [2022-07-20 22:47:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:49,155 INFO L93 Difference]: Finished difference Result 236596 states and 250206 transitions. [2022-07-20 22:47:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:49,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 2 states have internal predecessors, (283), 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 394 [2022-07-20 22:47:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:49,366 INFO L225 Difference]: With dead ends: 236596 [2022-07-20 22:47:49,366 INFO L226 Difference]: Without dead ends: 156441 [2022-07-20 22:47:49,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:49,431 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 160 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:49,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 473 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156441 states. [2022-07-20 22:47:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156441 to 155615. [2022-07-20 22:47:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155615 states, 155614 states have (on average 1.0569743082241958) internal successors, (164480), 155614 states have internal predecessors, (164480), 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) [2022-07-20 22:47:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155615 states to 155615 states and 164480 transitions. [2022-07-20 22:47:52,006 INFO L78 Accepts]: Start accepts. Automaton has 155615 states and 164480 transitions. Word has length 394 [2022-07-20 22:47:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:52,007 INFO L495 AbstractCegarLoop]: Abstraction has 155615 states and 164480 transitions. [2022-07-20 22:47:52,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 2 states have internal predecessors, (283), 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) [2022-07-20 22:47:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 155615 states and 164480 transitions. [2022-07-20 22:47:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-07-20 22:47:52,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:52,038 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:52,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:52,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:52,255 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:52,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:52,255 INFO L85 PathProgramCache]: Analyzing trace with hash -684431586, now seen corresponding path program 1 times [2022-07-20 22:47:52,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:52,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346281317] [2022-07-20 22:47:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:52,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 289 proven. 9 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-07-20 22:47:52,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:52,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346281317] [2022-07-20 22:47:52,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346281317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:52,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495584407] [2022-07-20 22:47:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:52,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:52,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:52,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:47:52,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 22:47:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:53,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-20 22:47:53,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:53,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495584407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:53,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:53,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-20 22:47:53,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204783973] [2022-07-20 22:47:53,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:53,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:53,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:53,297 INFO L87 Difference]: Start difference. First operand 155615 states and 164480 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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) [2022-07-20 22:47:54,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:54,876 INFO L93 Difference]: Finished difference Result 305964 states and 323532 transitions. [2022-07-20 22:47:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 412 [2022-07-20 22:47:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:55,122 INFO L225 Difference]: With dead ends: 305964 [2022-07-20 22:47:55,122 INFO L226 Difference]: Without dead ends: 154622 [2022-07-20 22:47:55,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:55,200 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 106 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:55,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 274 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:47:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154622 states. [2022-07-20 22:47:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154622 to 152976. [2022-07-20 22:47:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152976 states, 152975 states have (on average 1.0548978591273084) internal successors, (161373), 152975 states have internal predecessors, (161373), 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) [2022-07-20 22:47:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152976 states to 152976 states and 161373 transitions. [2022-07-20 22:47:57,662 INFO L78 Accepts]: Start accepts. Automaton has 152976 states and 161373 transitions. Word has length 412 [2022-07-20 22:47:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:57,662 INFO L495 AbstractCegarLoop]: Abstraction has 152976 states and 161373 transitions. [2022-07-20 22:47:57,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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) [2022-07-20 22:47:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 152976 states and 161373 transitions. [2022-07-20 22:47:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-07-20 22:47:57,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:57,697 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:57,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-20 22:47:57,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:57,912 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:57,913 INFO L85 PathProgramCache]: Analyzing trace with hash 839462593, now seen corresponding path program 1 times [2022-07-20 22:47:57,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:57,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291903281] [2022-07-20 22:47:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:57,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 184 proven. 6 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2022-07-20 22:47:58,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:58,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291903281] [2022-07-20 22:47:58,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291903281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:58,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163026618] [2022-07-20 22:47:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:58,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:58,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:47:58,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 22:47:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:58,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:58,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 474 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-07-20 22:47:58,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:58,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163026618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:58,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:58,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:58,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292872719] [2022-07-20 22:47:58,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:58,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:58,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:58,284 INFO L87 Difference]: Start difference. First operand 152976 states and 161373 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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) [2022-07-20 22:47:59,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:59,831 INFO L93 Difference]: Finished difference Result 298622 states and 314940 transitions. [2022-07-20 22:47:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:59,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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 434 [2022-07-20 22:47:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:00,097 INFO L225 Difference]: With dead ends: 298622 [2022-07-20 22:48:00,098 INFO L226 Difference]: Without dead ends: 145851 [2022-07-20 22:48:00,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:00,202 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 216 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:00,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 84 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:48:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145851 states. [2022-07-20 22:48:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145851 to 130389. [2022-07-20 22:48:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130389 states, 130388 states have (on average 1.049636469613768) internal successors, (136860), 130388 states have internal predecessors, (136860), 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) [2022-07-20 22:48:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130389 states to 130389 states and 136860 transitions. [2022-07-20 22:48:02,185 INFO L78 Accepts]: Start accepts. Automaton has 130389 states and 136860 transitions. Word has length 434 [2022-07-20 22:48:02,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:02,186 INFO L495 AbstractCegarLoop]: Abstraction has 130389 states and 136860 transitions. [2022-07-20 22:48:02,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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) [2022-07-20 22:48:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 130389 states and 136860 transitions. [2022-07-20 22:48:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-07-20 22:48:02,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:02,220 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:02,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 22:48:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-20 22:48:02,447 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:02,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1789592570, now seen corresponding path program 1 times [2022-07-20 22:48:02,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:02,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773441702] [2022-07-20 22:48:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:02,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 475 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-20 22:48:03,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:03,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773441702] [2022-07-20 22:48:03,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773441702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:03,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:03,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:48:03,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57092034] [2022-07-20 22:48:03,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:48:03,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:03,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:48:03,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:03,168 INFO L87 Difference]: Start difference. First operand 130389 states and 136860 transitions. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 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) [2022-07-20 22:48:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:04,827 INFO L93 Difference]: Finished difference Result 322224 states and 337738 transitions. [2022-07-20 22:48:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:48:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 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 443 [2022-07-20 22:48:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:05,144 INFO L225 Difference]: With dead ends: 322224 [2022-07-20 22:48:05,144 INFO L226 Difference]: Without dead ends: 191626 [2022-07-20 22:48:05,193 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 [2022-07-20 22:48:05,195 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 274 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:05,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 441 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:48:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191626 states. [2022-07-20 22:48:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191626 to 184298. [2022-07-20 22:48:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184298 states, 184297 states have (on average 1.0475319728481745) internal successors, (193057), 184297 states have internal predecessors, (193057), 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) [2022-07-20 22:48:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184298 states to 184298 states and 193057 transitions. [2022-07-20 22:48:07,770 INFO L78 Accepts]: Start accepts. Automaton has 184298 states and 193057 transitions. Word has length 443 [2022-07-20 22:48:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:07,771 INFO L495 AbstractCegarLoop]: Abstraction has 184298 states and 193057 transitions. [2022-07-20 22:48:07,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 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) [2022-07-20 22:48:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 184298 states and 193057 transitions. [2022-07-20 22:48:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-07-20 22:48:07,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:07,808 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-20 22:48:07,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 22:48:07,810 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1068018161, now seen corresponding path program 1 times [2022-07-20 22:48:07,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:07,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321022256] [2022-07-20 22:48:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:07,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:48:07,939 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-20 22:48:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:48:08,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-20 22:48:08,191 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-20 22:48:08,192 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-20 22:48:08,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 22:48:08,195 INFO L356 BasicCegarLoop]: Path program 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] [2022-07-20 22:48:08,198 INFO L176 ceAbstractionStarter]: Computing trace abstraction results