./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label08.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 6974994fa41c2218950105a3f2a905efa9ed2213c945e8187ea9622e98b47d24 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:09:20,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:09:20,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:09:20,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:09:20,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:09:20,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:09:20,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:09:20,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:09:20,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:09:20,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:09:20,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:09:20,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:09:20,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:09:20,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:09:20,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:09:20,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:09:20,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:09:20,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:09:20,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:09:20,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:09:20,672 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:09:20,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:09:20,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:09:20,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:09:20,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:09:20,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:09:20,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:09:20,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:09:20,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:09:20,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:09:20,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:09:20,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:09:20,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:09:20,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:09:20,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:09:20,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:09:20,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:09:20,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:09:20,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:09:20,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:09:20,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:09:20,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:09:20,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:09:20,710 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:09:20,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:09:20,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:09:20,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:09:20,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:09:20,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:09:20,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:09:20,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:09:20,712 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:09:20,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:09:20,713 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:09:20,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:09:20,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:09:20,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:09:20,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:09:20,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:09:20,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:09:20,714 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:09:20,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:09:20,714 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:09:20,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:09:20,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:09:20,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:09:20,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:09:20,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:09:20,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:09:20,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:09:20,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:09:20,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:09:20,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:09:20,716 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:09:20,716 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:09:20,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:09:20,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6974994fa41c2218950105a3f2a905efa9ed2213c945e8187ea9622e98b47d24 [2022-07-19 12:09:20,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:09:20,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:09:20,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:09:20,887 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:09:20,887 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:09:20,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label08.c [2022-07-19 12:09:20,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a523cb263/762a34ae1d534614ad309a4e7b367311/FLAG79da3610c [2022-07-19 12:09:21,395 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:09:21,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label08.c [2022-07-19 12:09:21,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a523cb263/762a34ae1d534614ad309a4e7b367311/FLAG79da3610c [2022-07-19 12:09:21,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a523cb263/762a34ae1d534614ad309a4e7b367311 [2022-07-19 12:09:21,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:09:21,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:09:21,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:09:21,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:09:21,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:09:21,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:09:21" (1/1) ... [2022-07-19 12:09:21,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60e2ba19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:21, skipping insertion in model container [2022-07-19 12:09:21,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:09:21" (1/1) ... [2022-07-19 12:09:21,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:09:21,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:09:21,977 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label08.c[3868,3881] [2022-07-19 12:09:22,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:09:22,504 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:09:22,525 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label08.c[3868,3881] [2022-07-19 12:09:22,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:09:22,920 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:09:22,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22 WrapperNode [2022-07-19 12:09:22,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:09:22,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:09:22,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:09:22,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:09:22,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (1/1) ... [2022-07-19 12:09:22,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (1/1) ... [2022-07-19 12:09:23,296 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-19 12:09:23,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:09:23,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:09:23,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:09:23,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:09:23,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (1/1) ... [2022-07-19 12:09:23,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (1/1) ... [2022-07-19 12:09:23,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (1/1) ... [2022-07-19 12:09:23,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (1/1) ... [2022-07-19 12:09:23,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (1/1) ... [2022-07-19 12:09:23,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (1/1) ... [2022-07-19 12:09:23,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (1/1) ... [2022-07-19 12:09:23,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:09:23,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:09:23,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:09:23,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:09:23,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (1/1) ... [2022-07-19 12:09:23,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:09:23,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:09:23,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 12:09:23,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 12:09:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:09:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:09:23,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:09:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:09:23,810 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:09:23,811 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:09:27,214 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:09:27,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:09:27,227 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:09:27,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:09:27 BoogieIcfgContainer [2022-07-19 12:09:27,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:09:27,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:09:27,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:09:27,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:09:27,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:09:21" (1/3) ... [2022-07-19 12:09:27,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f07763b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:09:27, skipping insertion in model container [2022-07-19 12:09:27,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:09:22" (2/3) ... [2022-07-19 12:09:27,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f07763b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:09:27, skipping insertion in model container [2022-07-19 12:09:27,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:09:27" (3/3) ... [2022-07-19 12:09:27,238 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label08.c [2022-07-19 12:09:27,250 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:09:27,250 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:09:27,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:09:27,307 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@2db49f27, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44b5bae2 [2022-07-19 12:09:27,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:09:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 12:09:27,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:27,322 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] [2022-07-19 12:09:27,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:27,327 INFO L85 PathProgramCache]: Analyzing trace with hash -748286455, now seen corresponding path program 1 times [2022-07-19 12:09:27,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:27,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937603679] [2022-07-19 12:09:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:27,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:09:27,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937603679] [2022-07-19 12:09:27,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937603679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:09:27,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:09:27,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:09:27,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990247416] [2022-07-19 12:09:27,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:09:27,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:09:27,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:09:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:27,527 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:30,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:09:30,598 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2022-07-19 12:09:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:09:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2022-07-19 12:09:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:09:30,614 INFO L225 Difference]: With dead ends: 2404 [2022-07-19 12:09:30,615 INFO L226 Difference]: Without dead ends: 1506 [2022-07-19 12:09:30,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:30,622 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 791 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:09:30,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:09:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-19 12:09:30,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-19 12:09:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2022-07-19 12:09:30,690 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 29 [2022-07-19 12:09:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:09:30,691 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2022-07-19 12:09:30,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2022-07-19 12:09:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 12:09:30,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:30,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:09:30,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:09:30,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 656790149, now seen corresponding path program 1 times [2022-07-19 12:09:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:30,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421784836] [2022-07-19 12:09:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:09:30,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:30,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421784836] [2022-07-19 12:09:30,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421784836] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:09:30,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:09:30,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:09:30,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924063394] [2022-07-19 12:09:30,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:09:30,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:09:30,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:09:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:30,791 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:09:33,243 INFO L93 Difference]: Finished difference Result 4512 states and 7249 transitions. [2022-07-19 12:09:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:09:33,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-07-19 12:09:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:09:33,252 INFO L225 Difference]: With dead ends: 4512 [2022-07-19 12:09:33,252 INFO L226 Difference]: Without dead ends: 3008 [2022-07-19 12:09:33,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:33,255 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 774 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:09:33,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 449 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:09:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2022-07-19 12:09:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2022-07-19 12:09:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4156967076820752) internal successors, (4257), 3007 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4257 transitions. [2022-07-19 12:09:33,297 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4257 transitions. Word has length 104 [2022-07-19 12:09:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:09:33,297 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4257 transitions. [2022-07-19 12:09:33,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4257 transitions. [2022-07-19 12:09:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-19 12:09:33,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:33,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:09:33,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:09:33,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:33,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1941804630, now seen corresponding path program 1 times [2022-07-19 12:09:33,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:33,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894909450] [2022-07-19 12:09:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:09:33,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:33,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894909450] [2022-07-19 12:09:33,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894909450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:09:33,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:09:33,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:09:33,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250422506] [2022-07-19 12:09:33,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:09:33,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:09:33,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:09:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:09:33,443 INFO L87 Difference]: Start difference. First operand 3008 states and 4257 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:09:37,546 INFO L93 Difference]: Finished difference Result 9769 states and 13601 transitions. [2022-07-19 12:09:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:09:37,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2022-07-19 12:09:37,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:09:37,569 INFO L225 Difference]: With dead ends: 9769 [2022-07-19 12:09:37,582 INFO L226 Difference]: Without dead ends: 6763 [2022-07-19 12:09:37,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:09:37,586 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 2180 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2180 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 5459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:09:37,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2180 Valid, 166 Invalid, 5459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-19 12:09:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-07-19 12:09:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-07-19 12:09:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3507837917775807) internal successors, (9134), 6762 states have internal predecessors, (9134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9134 transitions. [2022-07-19 12:09:37,711 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9134 transitions. Word has length 106 [2022-07-19 12:09:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:09:37,712 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 9134 transitions. [2022-07-19 12:09:37,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9134 transitions. [2022-07-19 12:09:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-19 12:09:37,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:37,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:09:37,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:09:37,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:37,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:37,719 INFO L85 PathProgramCache]: Analyzing trace with hash -907378540, now seen corresponding path program 1 times [2022-07-19 12:09:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:37,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80843698] [2022-07-19 12:09:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:37,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:09:37,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:37,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80843698] [2022-07-19 12:09:37,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80843698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:09:37,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283826841] [2022-07-19 12:09:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:37,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:09:37,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:09:37,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:09:37,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:09:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:38,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:09:38,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:09:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:09:38,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:09:38,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283826841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:09:38,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:09:38,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 12:09:38,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873818109] [2022-07-19 12:09:38,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:09:38,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:09:38,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:38,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:09:38,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:09:38,224 INFO L87 Difference]: Start difference. First operand 6763 states and 9134 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:09:40,274 INFO L93 Difference]: Finished difference Result 15777 states and 21144 transitions. [2022-07-19 12:09:40,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:09:40,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 [2022-07-19 12:09:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:09:40,300 INFO L225 Difference]: With dead ends: 15777 [2022-07-19 12:09:40,300 INFO L226 Difference]: Without dead ends: 9767 [2022-07-19 12:09:40,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:09:40,307 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 712 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:09:40,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 156 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 12:09:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2022-07-19 12:09:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2022-07-19 12:09:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2556829817734998) internal successors, (12263), 9766 states have internal predecessors, (12263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12263 transitions. [2022-07-19 12:09:40,429 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12263 transitions. Word has length 174 [2022-07-19 12:09:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:09:40,430 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 12263 transitions. [2022-07-19 12:09:40,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12263 transitions. [2022-07-19 12:09:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-07-19 12:09:40,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:40,433 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:09:40,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 12:09:40,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:09:40,650 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:40,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:40,650 INFO L85 PathProgramCache]: Analyzing trace with hash 414176474, now seen corresponding path program 1 times [2022-07-19 12:09:40,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:40,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616378314] [2022-07-19 12:09:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:40,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 12:09:40,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:40,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616378314] [2022-07-19 12:09:40,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616378314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:09:40,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:09:40,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:09:40,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447769664] [2022-07-19 12:09:40,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:09:40,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:09:40,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:09:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:40,849 INFO L87 Difference]: Start difference. First operand 9767 states and 12263 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:09:43,067 INFO L93 Difference]: Finished difference Result 23287 states and 30152 transitions. [2022-07-19 12:09:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:09:43,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 241 [2022-07-19 12:09:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:09:43,098 INFO L225 Difference]: With dead ends: 23287 [2022-07-19 12:09:43,099 INFO L226 Difference]: Without dead ends: 14273 [2022-07-19 12:09:43,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:43,110 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 766 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 2204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:09:43,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 487 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 2204 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:09:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14273 states. [2022-07-19 12:09:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 9767. [2022-07-19 12:09:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2556829817734998) internal successors, (12263), 9766 states have internal predecessors, (12263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12263 transitions. [2022-07-19 12:09:43,267 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12263 transitions. Word has length 241 [2022-07-19 12:09:43,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:09:43,268 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 12263 transitions. [2022-07-19 12:09:43,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12263 transitions. [2022-07-19 12:09:43,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-07-19 12:09:43,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:43,271 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:09:43,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:09:43,272 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:43,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:43,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1767025089, now seen corresponding path program 1 times [2022-07-19 12:09:43,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:43,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319716369] [2022-07-19 12:09:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:43,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-19 12:09:43,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:43,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319716369] [2022-07-19 12:09:43,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319716369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:09:43,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:09:43,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:09:43,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555426531] [2022-07-19 12:09:43,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:09:43,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:09:43,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:43,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:09:43,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:43,396 INFO L87 Difference]: Start difference. First operand 9767 states and 12263 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:09:45,983 INFO L93 Difference]: Finished difference Result 27044 states and 34472 transitions. [2022-07-19 12:09:45,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:09:45,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 242 [2022-07-19 12:09:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:09:46,010 INFO L225 Difference]: With dead ends: 27044 [2022-07-19 12:09:46,011 INFO L226 Difference]: Without dead ends: 18030 [2022-07-19 12:09:46,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:46,018 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:09:46,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 352 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:09:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18030 states. [2022-07-19 12:09:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18030 to 15775. [2022-07-19 12:09:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2222644858628122) internal successors, (19280), 15774 states have internal predecessors, (19280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19280 transitions. [2022-07-19 12:09:46,178 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19280 transitions. Word has length 242 [2022-07-19 12:09:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:09:46,179 INFO L495 AbstractCegarLoop]: Abstraction has 15775 states and 19280 transitions. [2022-07-19 12:09:46,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19280 transitions. [2022-07-19 12:09:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-07-19 12:09:46,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:46,183 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:09:46,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:09:46,183 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1954589035, now seen corresponding path program 1 times [2022-07-19 12:09:46,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:46,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174299544] [2022-07-19 12:09:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:46,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-19 12:09:46,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:46,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174299544] [2022-07-19 12:09:46,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174299544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:09:46,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:09:46,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:09:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940069357] [2022-07-19 12:09:46,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:09:46,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:09:46,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:09:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:09:46,278 INFO L87 Difference]: Start difference. First operand 15775 states and 19280 transitions. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:09:48,519 INFO L93 Difference]: Finished difference Result 33087 states and 40331 transitions. [2022-07-19 12:09:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:09:48,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 337 [2022-07-19 12:09:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:09:48,565 INFO L225 Difference]: With dead ends: 33087 [2022-07-19 12:09:48,565 INFO L226 Difference]: Without dead ends: 18028 [2022-07-19 12:09:48,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:09:48,580 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3804 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 3903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:09:48,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 712 Invalid, 3903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3804 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:09:48,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2022-07-19 12:09:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 18028. [2022-07-19 12:09:48,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18028 states, 18027 states have (on average 1.1949298274810007) internal successors, (21541), 18027 states have internal predecessors, (21541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18028 states to 18028 states and 21541 transitions. [2022-07-19 12:09:48,843 INFO L78 Accepts]: Start accepts. Automaton has 18028 states and 21541 transitions. Word has length 337 [2022-07-19 12:09:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:09:48,843 INFO L495 AbstractCegarLoop]: Abstraction has 18028 states and 21541 transitions. [2022-07-19 12:09:48,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 18028 states and 21541 transitions. [2022-07-19 12:09:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-07-19 12:09:48,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:48,847 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:09:48,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:09:48,848 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash -644645752, now seen corresponding path program 1 times [2022-07-19 12:09:48,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:48,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489046972] [2022-07-19 12:09:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:48,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 12:09:48,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:48,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489046972] [2022-07-19 12:09:48,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489046972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:09:48,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:09:48,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:09:48,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622693015] [2022-07-19 12:09:48,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:09:48,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:09:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:09:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:48,957 INFO L87 Difference]: Start difference. First operand 18028 states and 21541 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:09:51,536 INFO L93 Difference]: Finished difference Result 43564 states and 53107 transitions. [2022-07-19 12:09:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:09:51,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 352 [2022-07-19 12:09:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:09:51,566 INFO L225 Difference]: With dead ends: 43564 [2022-07-19 12:09:51,579 INFO L226 Difference]: Without dead ends: 26289 [2022-07-19 12:09:51,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:51,618 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 708 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:09:51,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 395 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 2241 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:09:51,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26289 states. [2022-07-19 12:09:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26289 to 25538. [2022-07-19 12:09:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25538 states, 25537 states have (on average 1.194384618396836) internal successors, (30501), 25537 states have internal predecessors, (30501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25538 states to 25538 states and 30501 transitions. [2022-07-19 12:09:52,112 INFO L78 Accepts]: Start accepts. Automaton has 25538 states and 30501 transitions. Word has length 352 [2022-07-19 12:09:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:09:52,113 INFO L495 AbstractCegarLoop]: Abstraction has 25538 states and 30501 transitions. [2022-07-19 12:09:52,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 25538 states and 30501 transitions. [2022-07-19 12:09:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-07-19 12:09:52,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:52,124 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:09:52,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:09:52,124 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1566716866, now seen corresponding path program 1 times [2022-07-19 12:09:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:52,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159549366] [2022-07-19 12:09:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:52,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 12:09:52,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159549366] [2022-07-19 12:09:52,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159549366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:09:52,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:09:52,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:09:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097584997] [2022-07-19 12:09:52,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:09:52,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:09:52,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:09:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:52,386 INFO L87 Difference]: Start difference. First operand 25538 states and 30501 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:09:54,820 INFO L93 Difference]: Finished difference Result 60086 states and 73355 transitions. [2022-07-19 12:09:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:09:54,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 380 [2022-07-19 12:09:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:09:54,859 INFO L225 Difference]: With dead ends: 60086 [2022-07-19 12:09:54,860 INFO L226 Difference]: Without dead ends: 35301 [2022-07-19 12:09:54,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:54,881 INFO L413 NwaCegarLoop]: 1220 mSDtfsCounter, 680 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:09:54,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 1228 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:09:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35301 states. [2022-07-19 12:09:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35301 to 33048. [2022-07-19 12:09:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33048 states, 33047 states have (on average 1.18089387841559) internal successors, (39025), 33047 states have internal predecessors, (39025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33048 states to 33048 states and 39025 transitions. [2022-07-19 12:09:55,183 INFO L78 Accepts]: Start accepts. Automaton has 33048 states and 39025 transitions. Word has length 380 [2022-07-19 12:09:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:09:55,183 INFO L495 AbstractCegarLoop]: Abstraction has 33048 states and 39025 transitions. [2022-07-19 12:09:55,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 33048 states and 39025 transitions. [2022-07-19 12:09:55,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-07-19 12:09:55,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:55,189 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:09:55,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 12:09:55,189 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:55,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2101682232, now seen corresponding path program 1 times [2022-07-19 12:09:55,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:55,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005046862] [2022-07-19 12:09:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:55,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-19 12:09:55,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:55,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005046862] [2022-07-19 12:09:55,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005046862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:09:55,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:09:55,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:09:55,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168389705] [2022-07-19 12:09:55,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:09:55,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:09:55,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:09:55,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:55,324 INFO L87 Difference]: Start difference. First operand 33048 states and 39025 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:09:57,623 INFO L93 Difference]: Finished difference Result 75857 states and 91237 transitions. [2022-07-19 12:09:57,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:09:57,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 384 [2022-07-19 12:09:57,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:09:57,669 INFO L225 Difference]: With dead ends: 75857 [2022-07-19 12:09:57,670 INFO L226 Difference]: Without dead ends: 43562 [2022-07-19 12:09:57,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:09:57,693 INFO L413 NwaCegarLoop]: 1288 mSDtfsCounter, 673 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:09:57,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1296 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:09:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43562 states. [2022-07-19 12:09:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43562 to 43562. [2022-07-19 12:09:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43562 states, 43561 states have (on average 1.1594316016620372) internal successors, (50506), 43561 states have internal predecessors, (50506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43562 states to 43562 states and 50506 transitions. [2022-07-19 12:09:58,066 INFO L78 Accepts]: Start accepts. Automaton has 43562 states and 50506 transitions. Word has length 384 [2022-07-19 12:09:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:09:58,067 INFO L495 AbstractCegarLoop]: Abstraction has 43562 states and 50506 transitions. [2022-07-19 12:09:58,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:09:58,067 INFO L276 IsEmpty]: Start isEmpty. Operand 43562 states and 50506 transitions. [2022-07-19 12:09:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-07-19 12:09:58,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:09:58,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:09:58,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 12:09:58,071 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:09:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:09:58,072 INFO L85 PathProgramCache]: Analyzing trace with hash 865480578, now seen corresponding path program 1 times [2022-07-19 12:09:58,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:09:58,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789700210] [2022-07-19 12:09:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:58,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:09:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 338 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:09:58,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:09:58,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789700210] [2022-07-19 12:09:58,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789700210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:09:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741321627] [2022-07-19 12:09:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:09:58,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:09:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:09:58,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:09:58,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:09:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:09:58,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 12:09:58,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:09:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 246 proven. 27 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-19 12:09:58,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 12:09:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 246 proven. 27 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-19 12:09:58,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741321627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 12:09:58,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 12:09:58,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-07-19 12:09:58,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813437556] [2022-07-19 12:09:58,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 12:09:58,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 12:09:58,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:09:58,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 12:09:58,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-19 12:09:58,717 INFO L87 Difference]: Start difference. First operand 43562 states and 50506 transitions. Second operand has 10 states, 10 states have (on average 78.3) internal successors, (783), 10 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:10:23,405 INFO L93 Difference]: Finished difference Result 181957 states and 211085 transitions. [2022-07-19 12:10:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 12:10:23,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 78.3) internal successors, (783), 10 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 388 [2022-07-19 12:10:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:10:23,568 INFO L225 Difference]: With dead ends: 181957 [2022-07-19 12:10:23,568 INFO L226 Difference]: Without dead ends: 126176 [2022-07-19 12:10:23,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 796 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 12:10:23,595 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 16878 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 39494 mSolverCounterSat, 6290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16878 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 45784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6290 IncrementalHoareTripleChecker+Valid, 39494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:10:23,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16878 Valid, 311 Invalid, 45784 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6290 Valid, 39494 Invalid, 0 Unknown, 0 Unchecked, 23.0s Time] [2022-07-19 12:10:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126176 states. [2022-07-19 12:10:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126176 to 103642. [2022-07-19 12:10:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103642 states, 103641 states have (on average 1.116913190725678) internal successors, (115758), 103641 states have internal predecessors, (115758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103642 states to 103642 states and 115758 transitions. [2022-07-19 12:10:25,002 INFO L78 Accepts]: Start accepts. Automaton has 103642 states and 115758 transitions. Word has length 388 [2022-07-19 12:10:25,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:10:25,002 INFO L495 AbstractCegarLoop]: Abstraction has 103642 states and 115758 transitions. [2022-07-19 12:10:25,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 78.3) internal successors, (783), 10 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 103642 states and 115758 transitions. [2022-07-19 12:10:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-07-19 12:10:25,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:10:25,009 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:10:25,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:10:25,244 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,SelfDestructingSolverStorable10 [2022-07-19 12:10:25,245 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:10:25,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:10:25,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1211520019, now seen corresponding path program 1 times [2022-07-19 12:10:25,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:10:25,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986501438] [2022-07-19 12:10:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:10:25,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:10:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:10:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 12:10:25,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:10:25,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986501438] [2022-07-19 12:10:25,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986501438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:10:25,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:10:25,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:10:25,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025046097] [2022-07-19 12:10:25,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:10:25,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:10:25,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:10:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:10:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:10:25,383 INFO L87 Difference]: Start difference. First operand 103642 states and 115758 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:10:28,423 INFO L93 Difference]: Finished difference Result 276374 states and 310302 transitions. [2022-07-19 12:10:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:10:28,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 437 [2022-07-19 12:10:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:10:28,665 INFO L225 Difference]: With dead ends: 276374 [2022-07-19 12:10:28,666 INFO L226 Difference]: Without dead ends: 171232 [2022-07-19 12:10:28,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:10:28,800 INFO L413 NwaCegarLoop]: 1272 mSDtfsCounter, 589 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:10:28,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1279 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:10:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171232 states. [2022-07-19 12:10:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171232 to 165975. [2022-07-19 12:10:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165975 states, 165974 states have (on average 1.092315663899165) internal successors, (181296), 165974 states have internal predecessors, (181296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165975 states to 165975 states and 181296 transitions. [2022-07-19 12:10:30,930 INFO L78 Accepts]: Start accepts. Automaton has 165975 states and 181296 transitions. Word has length 437 [2022-07-19 12:10:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:10:30,930 INFO L495 AbstractCegarLoop]: Abstraction has 165975 states and 181296 transitions. [2022-07-19 12:10:30,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 165975 states and 181296 transitions. [2022-07-19 12:10:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-07-19 12:10:30,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:10:30,958 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:10:30,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 12:10:30,959 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:10:30,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:10:30,959 INFO L85 PathProgramCache]: Analyzing trace with hash 952699508, now seen corresponding path program 1 times [2022-07-19 12:10:30,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:10:30,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023343342] [2022-07-19 12:10:30,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:10:30,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:10:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:10:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 12:10:31,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:10:31,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023343342] [2022-07-19 12:10:31,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023343342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:10:31,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:10:31,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:10:31,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162376982] [2022-07-19 12:10:31,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:10:31,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:10:31,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:10:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:10:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:10:31,078 INFO L87 Difference]: Start difference. First operand 165975 states and 181296 transitions. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:10:34,114 INFO L93 Difference]: Finished difference Result 362741 states and 398448 transitions. [2022-07-19 12:10:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:10:34,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 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 463 [2022-07-19 12:10:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:10:34,388 INFO L225 Difference]: With dead ends: 362741 [2022-07-19 12:10:34,388 INFO L226 Difference]: Without dead ends: 196768 [2022-07-19 12:10:34,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:10:34,454 INFO L413 NwaCegarLoop]: 1117 mSDtfsCounter, 667 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:10:34,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1125 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 12:10:34,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196768 states. [2022-07-19 12:10:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196768 to 192260. [2022-07-19 12:10:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192260 states, 192259 states have (on average 1.0855720668473257) internal successors, (208711), 192259 states have internal predecessors, (208711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192260 states to 192260 states and 208711 transitions. [2022-07-19 12:10:36,643 INFO L78 Accepts]: Start accepts. Automaton has 192260 states and 208711 transitions. Word has length 463 [2022-07-19 12:10:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:10:36,644 INFO L495 AbstractCegarLoop]: Abstraction has 192260 states and 208711 transitions. [2022-07-19 12:10:36,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 192260 states and 208711 transitions. [2022-07-19 12:10:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-07-19 12:10:36,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:10:36,652 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:10:36,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:10:36,652 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:10:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:10:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash 904293862, now seen corresponding path program 1 times [2022-07-19 12:10:36,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:10:36,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166736828] [2022-07-19 12:10:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:10:36,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:10:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:10:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-07-19 12:10:37,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:10:37,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166736828] [2022-07-19 12:10:37,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166736828] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:10:37,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:10:37,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:10:37,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170659510] [2022-07-19 12:10:37,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:10:37,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:10:37,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:10:37,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:10:37,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:10:37,137 INFO L87 Difference]: Start difference. First operand 192260 states and 208711 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:10:40,384 INFO L93 Difference]: Finished difference Result 441594 states and 481587 transitions. [2022-07-19 12:10:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:10:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 469 [2022-07-19 12:10:40,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:10:40,989 INFO L225 Difference]: With dead ends: 441594 [2022-07-19 12:10:40,989 INFO L226 Difference]: Without dead ends: 242577 [2022-07-19 12:10:41,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:10:41,070 INFO L413 NwaCegarLoop]: 1222 mSDtfsCounter, 675 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:10:41,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1230 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 2093 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-19 12:10:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242577 states. [2022-07-19 12:10:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242577 to 229059. [2022-07-19 12:10:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229059 states, 229058 states have (on average 1.0691746195286784) internal successors, (244903), 229058 states have internal predecessors, (244903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229059 states to 229059 states and 244903 transitions. [2022-07-19 12:10:44,317 INFO L78 Accepts]: Start accepts. Automaton has 229059 states and 244903 transitions. Word has length 469 [2022-07-19 12:10:44,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:10:44,317 INFO L495 AbstractCegarLoop]: Abstraction has 229059 states and 244903 transitions. [2022-07-19 12:10:44,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 229059 states and 244903 transitions. [2022-07-19 12:10:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-07-19 12:10:44,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:10:44,323 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:10:44,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:10:44,323 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:10:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:10:44,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1687545141, now seen corresponding path program 1 times [2022-07-19 12:10:44,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:10:44,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361856543] [2022-07-19 12:10:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:10:44,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:10:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:10:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-07-19 12:10:44,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:10:44,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361856543] [2022-07-19 12:10:44,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361856543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:10:44,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:10:44,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:10:44,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037951548] [2022-07-19 12:10:44,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:10:44,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:10:44,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:10:44,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:10:44,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:10:44,451 INFO L87 Difference]: Start difference. First operand 229059 states and 244903 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:10:47,916 INFO L93 Difference]: Finished difference Result 458116 states and 489479 transitions. [2022-07-19 12:10:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:10:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 516 [2022-07-19 12:10:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:10:48,271 INFO L225 Difference]: With dead ends: 458116 [2022-07-19 12:10:48,271 INFO L226 Difference]: Without dead ends: 227557 [2022-07-19 12:10:48,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:10:48,388 INFO L413 NwaCegarLoop]: 882 mSDtfsCounter, 734 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:10:48,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 889 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:10:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227557 states. [2022-07-19 12:10:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227557 to 221549. [2022-07-19 12:10:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221549 states, 221548 states have (on average 1.0586328921949193) internal successors, (234538), 221548 states have internal predecessors, (234538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221549 states to 221549 states and 234538 transitions. [2022-07-19 12:10:51,221 INFO L78 Accepts]: Start accepts. Automaton has 221549 states and 234538 transitions. Word has length 516 [2022-07-19 12:10:51,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:10:51,221 INFO L495 AbstractCegarLoop]: Abstraction has 221549 states and 234538 transitions. [2022-07-19 12:10:51,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:51,222 INFO L276 IsEmpty]: Start isEmpty. Operand 221549 states and 234538 transitions. [2022-07-19 12:10:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-07-19 12:10:51,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:10:51,228 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:10:51,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 12:10:51,229 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:10:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:10:51,229 INFO L85 PathProgramCache]: Analyzing trace with hash -564504737, now seen corresponding path program 1 times [2022-07-19 12:10:51,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:10:51,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920645454] [2022-07-19 12:10:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:10:51,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:10:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:10:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 567 proven. 54 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-19 12:10:51,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:10:51,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920645454] [2022-07-19 12:10:51,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920645454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:10:51,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650759753] [2022-07-19 12:10:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:10:51,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:10:51,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:10:51,887 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) [2022-07-19 12:10:51,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:10:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:10:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:10:52,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:10:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 621 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-19 12:10:52,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:10:52,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650759753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:10:52,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:10:52,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 12:10:52,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689258950] [2022-07-19 12:10:52,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:10:52,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:10:52,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:10:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:10:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:10:52,546 INFO L87 Difference]: Start difference. First operand 221549 states and 234538 transitions. Second operand has 4 states, 4 states have (on average 111.25) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:10:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:10:56,881 INFO L93 Difference]: Finished difference Result 444598 states and 470522 transitions. [2022-07-19 12:10:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:10:56,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 111.25) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 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 539 [2022-07-19 12:10:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:10:57,189 INFO L225 Difference]: With dead ends: 444598 [2022-07-19 12:10:57,189 INFO L226 Difference]: Without dead ends: 223802 [2022-07-19 12:10:57,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:10:57,329 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 1279 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3712 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 4545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 3712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:10:57,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 366 Invalid, 4545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [833 Valid, 3712 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:10:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223802 states. [2022-07-19 12:11:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223802 to 214039. [2022-07-19 12:11:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214039 states, 214038 states have (on average 1.0365636008559227) internal successors, (221864), 214038 states have internal predecessors, (221864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:11:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214039 states to 214039 states and 221864 transitions. [2022-07-19 12:11:00,318 INFO L78 Accepts]: Start accepts. Automaton has 214039 states and 221864 transitions. Word has length 539 [2022-07-19 12:11:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:11:00,318 INFO L495 AbstractCegarLoop]: Abstraction has 214039 states and 221864 transitions. [2022-07-19 12:11:00,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.25) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:11:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 214039 states and 221864 transitions. [2022-07-19 12:11:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2022-07-19 12:11:00,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:11:00,328 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:11:00,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 12:11:00,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:11:00,546 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:11:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:11:00,546 INFO L85 PathProgramCache]: Analyzing trace with hash 573314906, now seen corresponding path program 1 times [2022-07-19 12:11:00,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:11:00,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125468067] [2022-07-19 12:11:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:11:00,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:11:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:11:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 679 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-19 12:11:00,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:11:00,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125468067] [2022-07-19 12:11:00,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125468067] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:11:00,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:11:00,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:11:00,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022302021] [2022-07-19 12:11:00,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:11:00,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:11:00,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:11:00,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:11:00,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:11:00,863 INFO L87 Difference]: Start difference. First operand 214039 states and 221864 transitions. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:11:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:11:04,088 INFO L93 Difference]: Finished difference Result 429578 states and 445263 transitions. [2022-07-19 12:11:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:11:04,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 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 577 [2022-07-19 12:11:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:11:04,373 INFO L225 Difference]: With dead ends: 429578 [2022-07-19 12:11:04,374 INFO L226 Difference]: Without dead ends: 216292 [2022-07-19 12:11:04,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:11:04,493 INFO L413 NwaCegarLoop]: 1159 mSDtfsCounter, 599 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:11:04,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 1166 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:11:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216292 states. [2022-07-19 12:11:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216292 to 213288. [2022-07-19 12:11:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213288 states, 213287 states have (on average 1.0346856582914101) internal successors, (220685), 213287 states have internal predecessors, (220685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)