./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem18_label14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/Problem18_label14.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 a02231a91e38821a474a995aa0f6354f8b6e8aefa7ca1b1921ca101a19abba9e --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:02:18,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:02:18,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:02:18,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:02:18,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:02:18,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:02:18,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:02:18,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:02:18,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:02:18,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:02:18,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:02:18,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:02:18,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:02:18,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:02:18,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:02:18,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:02:18,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:02:18,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:02:18,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:02:18,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:02:18,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:02:18,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:02:18,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:02:18,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:02:18,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:02:18,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:02:18,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:02:18,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:02:18,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:02:18,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:02:18,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:02:18,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:02:18,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:02:18,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:02:18,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:02:18,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:02:18,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:02:18,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:02:18,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:02:18,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:02:18,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:02:18,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:02:18,975 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:02:18,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:02:18,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:02:18,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:02:18,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:02:18,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:02:18,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:02:18,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:02:18,978 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:02:18,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:02:18,985 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:02:18,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:02:18,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:02:18,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:02:18,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:02:18,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:02:18,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:02:18,986 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:02:18,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:02:18,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:02:18,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:02:18,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:02:18,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:02:18,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:02:18,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:02:18,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:02:18,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:02:18,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:02:18,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:02:18,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:02:18,989 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:02:18,989 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:02:18,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:02:18,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:02:18,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a02231a91e38821a474a995aa0f6354f8b6e8aefa7ca1b1921ca101a19abba9e [2021-12-15 10:02:19,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:02:19,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:02:19,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:02:19,230 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:02:19,231 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:02:19,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label14.c [2021-12-15 10:02:19,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6c0eba3f/2087f2a39c4d4e1ebb730d9b53054f68/FLAGf4dbf9b4e [2021-12-15 10:02:19,863 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:02:19,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label14.c [2021-12-15 10:02:19,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6c0eba3f/2087f2a39c4d4e1ebb730d9b53054f68/FLAGf4dbf9b4e [2021-12-15 10:02:20,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6c0eba3f/2087f2a39c4d4e1ebb730d9b53054f68 [2021-12-15 10:02:20,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:02:20,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:02:20,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:02:20,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:02:20,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:02:20,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:02:20" (1/1) ... [2021-12-15 10:02:20,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a9362a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:20, skipping insertion in model container [2021-12-15 10:02:20,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:02:20" (1/1) ... [2021-12-15 10:02:20,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:02:20,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:02:20,627 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/Problem18_label14.c[5298,5311] [2021-12-15 10:02:21,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:02:21,196 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:02:21,227 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/Problem18_label14.c[5298,5311] [2021-12-15 10:02:21,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:02:21,492 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:02:21,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21 WrapperNode [2021-12-15 10:02:21,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:02:21,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:02:21,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:02:21,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:02:21,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (1/1) ... [2021-12-15 10:02:21,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (1/1) ... [2021-12-15 10:02:21,711 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-12-15 10:02:21,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:02:21,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:02:21,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:02:21,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:02:21,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (1/1) ... [2021-12-15 10:02:21,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (1/1) ... [2021-12-15 10:02:21,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (1/1) ... [2021-12-15 10:02:21,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (1/1) ... [2021-12-15 10:02:21,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (1/1) ... [2021-12-15 10:02:21,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (1/1) ... [2021-12-15 10:02:21,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (1/1) ... [2021-12-15 10:02:21,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:02:21,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:02:21,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:02:21,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:02:21,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (1/1) ... [2021-12-15 10:02:21,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:02:21,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:02:22,037 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) [2021-12-15 10:02:22,123 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 [2021-12-15 10:02:22,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:02:22,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:02:22,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:02:22,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:02:22,209 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:02:22,211 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:02:24,720 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:02:24,738 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:02:24,739 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:02:24,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:02:24 BoogieIcfgContainer [2021-12-15 10:02:24,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:02:24,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:02:24,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:02:24,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:02:24,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:02:20" (1/3) ... [2021-12-15 10:02:24,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b59b2c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:02:24, skipping insertion in model container [2021-12-15 10:02:24,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:21" (2/3) ... [2021-12-15 10:02:24,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b59b2c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:02:24, skipping insertion in model container [2021-12-15 10:02:24,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:02:24" (3/3) ... [2021-12-15 10:02:24,747 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label14.c [2021-12-15 10:02:24,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:02:24,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:02:24,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:02:24,809 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:02:24,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:02:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-15 10:02:24,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:02:24,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:02:24,849 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:02:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:02:24,853 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2021-12-15 10:02:24,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:02:24,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623128186] [2021-12-15 10:02:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:24,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:02:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:02:25,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:02:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623128186] [2021-12-15 10:02:25,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623128186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:02:25,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:02:25,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:02:25,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845932395] [2021-12-15 10:02:25,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:02:25,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:02:25,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:02:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:02:25,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:02:25,145 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:30,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:02:30,366 INFO L93 Difference]: Finished difference Result 2898 states and 5646 transitions. [2021-12-15 10:02:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:02:30,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-12-15 10:02:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:02:30,397 INFO L225 Difference]: With dead ends: 2898 [2021-12-15 10:02:30,398 INFO L226 Difference]: Without dead ends: 2074 [2021-12-15 10:02:30,402 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:02:30,405 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 2020 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5431 mSolverCounterSat, 1015 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2020 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 6446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1015 IncrementalHoareTripleChecker+Valid, 5431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:02:30,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2020 Valid, 712 Invalid, 6446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1015 Valid, 5431 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-15 10:02:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-12-15 10:02:30,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2021-12-15 10:02:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 1.5909310178485288) internal successors, (3298), 2073 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3298 transitions. [2021-12-15 10:02:30,528 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3298 transitions. Word has length 50 [2021-12-15 10:02:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:02:30,532 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 3298 transitions. [2021-12-15 10:02:30,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3298 transitions. [2021-12-15 10:02:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-15 10:02:30,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:02:30,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:02:30,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:02:30,546 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:02:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:02:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash -876349695, now seen corresponding path program 1 times [2021-12-15 10:02:30,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:02:30,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297111719] [2021-12-15 10:02:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:30,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:02:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-15 10:02:30,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:02:30,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297111719] [2021-12-15 10:02:30,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297111719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:02:30,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:02:30,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:02:30,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961117259] [2021-12-15 10:02:30,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:02:30,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:02:30,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:02:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:02:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:02:30,809 INFO L87 Difference]: Start difference. First operand 2074 states and 3298 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:02:33,301 INFO L93 Difference]: Finished difference Result 5526 states and 9187 transitions. [2021-12-15 10:02:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:02:33,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-12-15 10:02:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:02:33,316 INFO L225 Difference]: With dead ends: 5526 [2021-12-15 10:02:33,316 INFO L226 Difference]: Without dead ends: 3454 [2021-12-15 10:02:33,323 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:02:33,325 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 590 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:02:33,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 436 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 10:02:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2021-12-15 10:02:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3454. [2021-12-15 10:02:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.4694468578048074) internal successors, (5074), 3453 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5074 transitions. [2021-12-15 10:02:33,418 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5074 transitions. Word has length 232 [2021-12-15 10:02:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:02:33,421 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 5074 transitions. [2021-12-15 10:02:33,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5074 transitions. [2021-12-15 10:02:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-15 10:02:33,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:02:33,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 10:02:33,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:02:33,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:02:33,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:02:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2076519517, now seen corresponding path program 1 times [2021-12-15 10:02:33,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:02:33,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99684565] [2021-12-15 10:02:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:33,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:02:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:02:33,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:02:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99684565] [2021-12-15 10:02:33,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99684565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:02:33,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:02:33,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:02:33,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744933121] [2021-12-15 10:02:33,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:02:33,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:02:33,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:02:33,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:02:33,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:02:33,651 INFO L87 Difference]: Start difference. First operand 3454 states and 5074 transitions. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:02:36,008 INFO L93 Difference]: Finished difference Result 8339 states and 11975 transitions. [2021-12-15 10:02:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:02:36,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 297 [2021-12-15 10:02:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:02:36,024 INFO L225 Difference]: With dead ends: 8339 [2021-12-15 10:02:36,024 INFO L226 Difference]: Without dead ends: 4834 [2021-12-15 10:02:36,028 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:02:36,029 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 531 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:02:36,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 637 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 2590 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 10:02:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2021-12-15 10:02:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 4144. [2021-12-15 10:02:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.3019551049963793) internal successors, (5394), 4143 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5394 transitions. [2021-12-15 10:02:36,115 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5394 transitions. Word has length 297 [2021-12-15 10:02:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:02:36,115 INFO L470 AbstractCegarLoop]: Abstraction has 4144 states and 5394 transitions. [2021-12-15 10:02:36,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5394 transitions. [2021-12-15 10:02:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-12-15 10:02:36,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:02:36,123 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:02:36,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:02:36,123 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:02:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:02:36,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1128550468, now seen corresponding path program 1 times [2021-12-15 10:02:36,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:02:36,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882492795] [2021-12-15 10:02:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:36,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:02:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 10:02:36,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:02:36,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882492795] [2021-12-15 10:02:36,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882492795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:02:36,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:02:36,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:02:36,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135014721] [2021-12-15 10:02:36,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:02:36,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:02:36,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:02:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:02:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:02:36,396 INFO L87 Difference]: Start difference. First operand 4144 states and 5394 transitions. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:02:38,295 INFO L93 Difference]: Finished difference Result 11046 states and 14785 transitions. [2021-12-15 10:02:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:02:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 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 414 [2021-12-15 10:02:38,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:02:38,346 INFO L225 Difference]: With dead ends: 11046 [2021-12-15 10:02:38,346 INFO L226 Difference]: Without dead ends: 6904 [2021-12-15 10:02:38,350 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:02:38,354 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 444 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:02:38,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 388 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 10:02:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2021-12-15 10:02:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 6214. [2021-12-15 10:02:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6213 states have (on average 1.2296797038467728) internal successors, (7640), 6213 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 7640 transitions. [2021-12-15 10:02:38,448 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 7640 transitions. Word has length 414 [2021-12-15 10:02:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:02:38,449 INFO L470 AbstractCegarLoop]: Abstraction has 6214 states and 7640 transitions. [2021-12-15 10:02:38,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 7640 transitions. [2021-12-15 10:02:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-12-15 10:02:38,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:02:38,456 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:02:38,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 10:02:38,457 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:02:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:02:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash -89101954, now seen corresponding path program 1 times [2021-12-15 10:02:38,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:02:38,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168820505] [2021-12-15 10:02:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:38,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:02:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:02:38,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:02:38,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168820505] [2021-12-15 10:02:38,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168820505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:02:38,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:02:38,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:02:38,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330029521] [2021-12-15 10:02:38,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:02:38,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:02:38,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:02:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:02:38,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:02:38,643 INFO L87 Difference]: Start difference. First operand 6214 states and 7640 transitions. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:40,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:02:40,626 INFO L93 Difference]: Finished difference Result 15876 states and 19412 transitions. [2021-12-15 10:02:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:02:40,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 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 442 [2021-12-15 10:02:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:02:40,652 INFO L225 Difference]: With dead ends: 15876 [2021-12-15 10:02:40,652 INFO L226 Difference]: Without dead ends: 9664 [2021-12-15 10:02:40,657 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:02:40,658 INFO L933 BasicCegarLoop]: 1118 mSDtfsCounter, 598 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 10:02:40,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 1125 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 10:02:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2021-12-15 10:02:40,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 9664. [2021-12-15 10:02:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9664 states, 9663 states have (on average 1.1778950636448309) internal successors, (11382), 9663 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9664 states to 9664 states and 11382 transitions. [2021-12-15 10:02:40,809 INFO L78 Accepts]: Start accepts. Automaton has 9664 states and 11382 transitions. Word has length 442 [2021-12-15 10:02:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:02:40,810 INFO L470 AbstractCegarLoop]: Abstraction has 9664 states and 11382 transitions. [2021-12-15 10:02:40,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 9664 states and 11382 transitions. [2021-12-15 10:02:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-12-15 10:02:40,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:02:40,821 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:02:40,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 10:02:40,822 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:02:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:02:40,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1816422631, now seen corresponding path program 1 times [2021-12-15 10:02:40,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:02:40,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647436248] [2021-12-15 10:02:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:40,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:02:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-15 10:02:40,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:02:40,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647436248] [2021-12-15 10:02:40,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647436248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:02:40,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:02:40,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:02:40,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425939347] [2021-12-15 10:02:40,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:02:40,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:02:40,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:02:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:02:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:02:40,994 INFO L87 Difference]: Start difference. First operand 9664 states and 11382 transitions. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:02:42,841 INFO L93 Difference]: Finished difference Result 26226 states and 31369 transitions. [2021-12-15 10:02:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:02:42,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 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 447 [2021-12-15 10:02:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:02:42,867 INFO L225 Difference]: With dead ends: 26226 [2021-12-15 10:02:42,868 INFO L226 Difference]: Without dead ends: 17254 [2021-12-15 10:02:42,877 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:02:42,878 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 398 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:02:42,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 426 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 10:02:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2021-12-15 10:02:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 15874. [2021-12-15 10:02:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15874 states, 15873 states have (on average 1.1355131355131356) internal successors, (18024), 15873 states have internal predecessors, (18024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15874 states to 15874 states and 18024 transitions. [2021-12-15 10:02:43,080 INFO L78 Accepts]: Start accepts. Automaton has 15874 states and 18024 transitions. Word has length 447 [2021-12-15 10:02:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:02:43,080 INFO L470 AbstractCegarLoop]: Abstraction has 15874 states and 18024 transitions. [2021-12-15 10:02:43,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 15874 states and 18024 transitions. [2021-12-15 10:02:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-12-15 10:02:43,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:02:43,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:02:43,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 10:02:43,089 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:02:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:02:43,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1370765905, now seen corresponding path program 1 times [2021-12-15 10:02:43,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:02:43,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676581683] [2021-12-15 10:02:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:43,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:02:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 186 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:02:43,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:02:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676581683] [2021-12-15 10:02:43,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676581683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:02:43,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671418949] [2021-12-15 10:02:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:43,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:02:43,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:02:43,335 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) [2021-12-15 10:02:43,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 10:02:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:02:43,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:02:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 10:02:44,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:02:44,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671418949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:02:44,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:02:44,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2021-12-15 10:02:44,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963345711] [2021-12-15 10:02:44,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:02:44,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:02:44,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:02:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:02:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:02:44,457 INFO L87 Difference]: Start difference. First operand 15874 states and 18024 transitions. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 2 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:02:46,372 INFO L93 Difference]: Finished difference Result 37266 states and 42484 transitions. [2021-12-15 10:02:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:02:46,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 2 states have internal predecessors, (402), 0 states have call successors, (0), 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 449 [2021-12-15 10:02:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:02:46,409 INFO L225 Difference]: With dead ends: 37266 [2021-12-15 10:02:46,409 INFO L226 Difference]: Without dead ends: 22084 [2021-12-15 10:02:46,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:02:46,428 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 403 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 2392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:02:46,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 351 Invalid, 2392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 10:02:46,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2021-12-15 10:02:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 22084. [2021-12-15 10:02:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22084 states, 22083 states have (on average 1.1058732962006974) internal successors, (24421), 22083 states have internal predecessors, (24421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22084 states to 22084 states and 24421 transitions. [2021-12-15 10:02:46,737 INFO L78 Accepts]: Start accepts. Automaton has 22084 states and 24421 transitions. Word has length 449 [2021-12-15 10:02:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:02:46,738 INFO L470 AbstractCegarLoop]: Abstraction has 22084 states and 24421 transitions. [2021-12-15 10:02:46,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 2 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 22084 states and 24421 transitions. [2021-12-15 10:02:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2021-12-15 10:02:46,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:02:46,749 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:02:46,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 10:02:46,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:02:46,956 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:02:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:02:46,956 INFO L85 PathProgramCache]: Analyzing trace with hash -472875325, now seen corresponding path program 1 times [2021-12-15 10:02:46,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:02:46,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441443872] [2021-12-15 10:02:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:46,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:02:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 353 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:02:47,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:02:47,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441443872] [2021-12-15 10:02:47,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441443872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:02:47,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039964684] [2021-12-15 10:02:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:47,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:02:47,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:02:47,551 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) [2021-12-15 10:02:47,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 10:02:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 10:02:47,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:02:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-12-15 10:02:49,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:02:49,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039964684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:02:49,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:02:49,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 10:02:49,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310373836] [2021-12-15 10:02:49,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:02:49,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:02:49,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:02:49,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:02:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-15 10:02:49,719 INFO L87 Difference]: Start difference. First operand 22084 states and 24421 transitions. Second operand has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:02:52,618 INFO L93 Difference]: Finished difference Result 51066 states and 57094 transitions. [2021-12-15 10:02:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:02:52,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 964 [2021-12-15 10:02:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:02:52,657 INFO L225 Difference]: With dead ends: 51066 [2021-12-15 10:02:52,657 INFO L226 Difference]: Without dead ends: 30364 [2021-12-15 10:02:52,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-15 10:02:52,680 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1027 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2842 mSolverCounterSat, 1350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 4192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1350 IncrementalHoareTripleChecker+Valid, 2842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:02:52,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 94 Invalid, 4192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1350 Valid, 2842 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 10:02:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2021-12-15 10:02:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 26914. [2021-12-15 10:02:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26914 states, 26913 states have (on average 1.1194589975104967) internal successors, (30128), 26913 states have internal predecessors, (30128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26914 states to 26914 states and 30128 transitions. [2021-12-15 10:02:52,984 INFO L78 Accepts]: Start accepts. Automaton has 26914 states and 30128 transitions. Word has length 964 [2021-12-15 10:02:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:02:52,985 INFO L470 AbstractCegarLoop]: Abstraction has 26914 states and 30128 transitions. [2021-12-15 10:02:52,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 26914 states and 30128 transitions. [2021-12-15 10:02:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 979 [2021-12-15 10:02:53,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:02:53,063 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:02:53,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 10:02:53,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-15 10:02:53,276 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:02:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:02:53,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1341441763, now seen corresponding path program 1 times [2021-12-15 10:02:53,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:02:53,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111419642] [2021-12-15 10:02:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:53,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:02:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-15 10:02:53,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:02:53,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111419642] [2021-12-15 10:02:53,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111419642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:02:53,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:02:53,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:02:53,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124994421] [2021-12-15 10:02:53,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:02:53,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:02:53,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:02:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:02:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:02:53,645 INFO L87 Difference]: Start difference. First operand 26914 states and 30128 transitions. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:02:55,628 INFO L93 Difference]: Finished difference Result 63486 states and 71960 transitions. [2021-12-15 10:02:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:02:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 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 978 [2021-12-15 10:02:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:02:55,671 INFO L225 Difference]: With dead ends: 63486 [2021-12-15 10:02:55,671 INFO L226 Difference]: Without dead ends: 37954 [2021-12-15 10:02:55,683 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:02:55,684 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 666 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:02:55,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 223 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 10:02:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37954 states. [2021-12-15 10:02:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37954 to 37264. [2021-12-15 10:02:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37264 states, 37263 states have (on average 1.1172476719534121) internal successors, (41632), 37263 states have internal predecessors, (41632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37264 states to 37264 states and 41632 transitions. [2021-12-15 10:02:56,086 INFO L78 Accepts]: Start accepts. Automaton has 37264 states and 41632 transitions. Word has length 978 [2021-12-15 10:02:56,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:02:56,088 INFO L470 AbstractCegarLoop]: Abstraction has 37264 states and 41632 transitions. [2021-12-15 10:02:56,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:02:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 37264 states and 41632 transitions. [2021-12-15 10:02:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1097 [2021-12-15 10:02:56,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:02:56,099 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:02:56,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 10:02:56,100 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:02:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:02:56,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1225193285, now seen corresponding path program 1 times [2021-12-15 10:02:56,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:02:56,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691964676] [2021-12-15 10:02:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:56,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:02:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 513 proven. 531 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:02:56,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:02:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691964676] [2021-12-15 10:02:56,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691964676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:02:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113338536] [2021-12-15 10:02:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:02:56,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:02:56,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:02:56,651 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) [2021-12-15 10:02:56,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 10:02:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:02:56,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 10:02:56,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:02:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-12-15 10:02:58,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:02:58,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113338536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:02:58,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:02:59,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-15 10:02:59,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250304339] [2021-12-15 10:02:59,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:02:59,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:02:59,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:02:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:02:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:02:59,002 INFO L87 Difference]: Start difference. First operand 37264 states and 41632 transitions. Second operand has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:03:02,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:03:02,109 INFO L93 Difference]: Finished difference Result 82116 states and 92160 transitions. [2021-12-15 10:03:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:03:02,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 1096 [2021-12-15 10:03:02,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:03:02,170 INFO L225 Difference]: With dead ends: 82116 [2021-12-15 10:03:02,170 INFO L226 Difference]: Without dead ends: 46234 [2021-12-15 10:03:02,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1103 GetRequests, 1094 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:03:02,195 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1055 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 4244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:03:02,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 115 Invalid, 4244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1466 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 10:03:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46234 states. [2021-12-15 10:03:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46234 to 42784. [2021-12-15 10:03:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42784 states, 42783 states have (on average 1.1232966365145034) internal successors, (48058), 42783 states have internal predecessors, (48058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:03:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42784 states to 42784 states and 48058 transitions. [2021-12-15 10:03:02,879 INFO L78 Accepts]: Start accepts. Automaton has 42784 states and 48058 transitions. Word has length 1096 [2021-12-15 10:03:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:03:02,880 INFO L470 AbstractCegarLoop]: Abstraction has 42784 states and 48058 transitions. [2021-12-15 10:03:02,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:03:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 42784 states and 48058 transitions. [2021-12-15 10:03:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1190 [2021-12-15 10:03:02,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:03:02,922 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:03:02,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 10:03:03,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:03:03,141 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:03:03,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:03:03,142 INFO L85 PathProgramCache]: Analyzing trace with hash -588787132, now seen corresponding path program 1 times [2021-12-15 10:03:03,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:03:03,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406738375] [2021-12-15 10:03:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:03:03,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:03:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:03:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 652 proven. 0 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2021-12-15 10:03:03,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:03:03,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406738375] [2021-12-15 10:03:03,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406738375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:03:03,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:03:03,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:03:03,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268978311] [2021-12-15 10:03:03,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:03:03,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:03:03,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:03:03,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:03:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:03:03,657 INFO L87 Difference]: Start difference. First operand 42784 states and 48058 transitions. Second operand has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:03:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:03:07,137 INFO L93 Difference]: Finished difference Result 109718 states and 123363 transitions. [2021-12-15 10:03:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:03:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 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 1189 [2021-12-15 10:03:07,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:03:07,218 INFO L225 Difference]: With dead ends: 109718 [2021-12-15 10:03:07,218 INFO L226 Difference]: Without dead ends: 66936 [2021-12-15 10:03:07,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:03:07,252 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 1401 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4033 mSolverCounterSat, 730 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 4763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 730 IncrementalHoareTripleChecker+Valid, 4033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:03:07,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1401 Valid, 210 Invalid, 4763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [730 Valid, 4033 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 10:03:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66936 states. [2021-12-15 10:03:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66936 to 56584. [2021-12-15 10:03:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56584 states, 56583 states have (on average 1.129632575155082) internal successors, (63918), 56583 states have internal predecessors, (63918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:03:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56584 states to 56584 states and 63918 transitions. [2021-12-15 10:03:07,933 INFO L78 Accepts]: Start accepts. Automaton has 56584 states and 63918 transitions. Word has length 1189 [2021-12-15 10:03:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:03:07,933 INFO L470 AbstractCegarLoop]: Abstraction has 56584 states and 63918 transitions. [2021-12-15 10:03:07,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:03:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 56584 states and 63918 transitions. [2021-12-15 10:03:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1204 [2021-12-15 10:03:07,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:03:07,948 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:03:07,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 10:03:07,949 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:03:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:03:07,949 INFO L85 PathProgramCache]: Analyzing trace with hash 112215388, now seen corresponding path program 1 times [2021-12-15 10:03:07,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:03:07,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271653097] [2021-12-15 10:03:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:03:07,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:03:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:03:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1505 backedges. 502 proven. 896 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-15 10:03:08,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:03:08,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271653097] [2021-12-15 10:03:08,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271653097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:03:08,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360949327] [2021-12-15 10:03:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:03:08,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:03:08,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:03:08,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:03:08,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 10:03:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:03:09,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 10:03:09,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:03:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1505 backedges. 610 proven. 0 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-12-15 10:03:10,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:03:10,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360949327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:03:10,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:03:10,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-15 10:03:10,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033401765] [2021-12-15 10:03:10,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:03:10,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:03:10,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:03:10,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:03:10,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-15 10:03:10,797 INFO L87 Difference]: Start difference. First operand 56584 states and 63918 transitions. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)