./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/array_3-2.i --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/loop-acceleration/array_3-2.i -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 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:49:55,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:49:55,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:49:55,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:49:55,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:49:55,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:49:55,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:49:55,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:49:55,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:49:55,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:49:55,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:49:55,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:49:55,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:49:55,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:49:55,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:49:55,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:49:55,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:49:55,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:49:55,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:49:55,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:49:55,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:49:55,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:49:55,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:49:55,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:49:55,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:49:55,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:49:55,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:49:55,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:49:55,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:49:55,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:49:55,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:49:55,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:49:55,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:49:55,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:49:55,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:49:55,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:49:55,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:49:55,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:49:55,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:49:55,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:49:55,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:49:55,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:49:55,264 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:49:55,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:49:55,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:49:55,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:49:55,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:49:55,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:49:55,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:49:55,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:49:55,267 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:49:55,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:49:55,268 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:49:55,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:49:55,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:49:55,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:49:55,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:49:55,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:49:55,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:49:55,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:49:55,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:49:55,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:49:55,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:49:55,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:49:55,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:49:55,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:49:55,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:49:55,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:49:55,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:49:55,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:49:55,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:49:55,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:49:55,271 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:49:55,271 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:49:55,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:49:55,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:49:55,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a [2021-12-15 10:49:55,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:49:55,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:49:55,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:49:55,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:49:55,483 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:49:55,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_3-2.i [2021-12-15 10:49:55,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c6486e44/50f01afb70d44b1589161a7309eef96b/FLAGf1cfdffa1 [2021-12-15 10:49:55,921 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:49:55,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_3-2.i [2021-12-15 10:49:55,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c6486e44/50f01afb70d44b1589161a7309eef96b/FLAGf1cfdffa1 [2021-12-15 10:49:55,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c6486e44/50f01afb70d44b1589161a7309eef96b [2021-12-15 10:49:55,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:49:55,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:49:55,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:49:55,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:49:55,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:49:55,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:49:55" (1/1) ... [2021-12-15 10:49:55,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d9b4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:55, skipping insertion in model container [2021-12-15 10:49:55,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:49:55" (1/1) ... [2021-12-15 10:49:55,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:49:55,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:49:56,094 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/loop-acceleration/array_3-2.i[809,822] [2021-12-15 10:49:56,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:49:56,116 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:49:56,124 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/loop-acceleration/array_3-2.i[809,822] [2021-12-15 10:49:56,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:49:56,135 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:49:56,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56 WrapperNode [2021-12-15 10:49:56,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:49:56,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:49:56,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:49:56,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:49:56,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (1/1) ... [2021-12-15 10:49:56,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (1/1) ... [2021-12-15 10:49:56,155 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-12-15 10:49:56,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:49:56,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:49:56,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:49:56,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:49:56,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (1/1) ... [2021-12-15 10:49:56,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (1/1) ... [2021-12-15 10:49:56,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (1/1) ... [2021-12-15 10:49:56,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (1/1) ... [2021-12-15 10:49:56,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (1/1) ... [2021-12-15 10:49:56,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (1/1) ... [2021-12-15 10:49:56,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (1/1) ... [2021-12-15 10:49:56,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:49:56,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:49:56,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:49:56,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:49:56,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (1/1) ... [2021-12-15 10:49:56,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:49:56,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:49:56,231 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 10:49:56,240 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 10:49:56,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:49:56,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:49:56,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 10:49:56,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 10:49:56,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:49:56,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:49:56,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 10:49:56,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 10:49:56,309 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:49:56,310 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:49:56,425 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:49:56,428 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:49:56,429 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 10:49:56,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:49:56 BoogieIcfgContainer [2021-12-15 10:49:56,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:49:56,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:49:56,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:49:56,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:49:56,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:49:55" (1/3) ... [2021-12-15 10:49:56,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1841d869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:49:56, skipping insertion in model container [2021-12-15 10:49:56,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:49:56" (2/3) ... [2021-12-15 10:49:56,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1841d869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:49:56, skipping insertion in model container [2021-12-15 10:49:56,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:49:56" (3/3) ... [2021-12-15 10:49:56,436 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2021-12-15 10:49:56,439 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:49:56,439 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:49:56,468 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:49:56,473 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 10:49:56,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:49:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:49:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 10:49:56,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:49:56,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:49:56,486 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:49:56,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:49:56,490 INFO L85 PathProgramCache]: Analyzing trace with hash 212441967, now seen corresponding path program 1 times [2021-12-15 10:49:56,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:49:56,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678385061] [2021-12-15 10:49:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:49:56,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:49:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:49:56,592 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 10:49:56,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:49:56,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678385061] [2021-12-15 10:49:56,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678385061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:49:56,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:49:56,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:49:56,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893267906] [2021-12-15 10:49:56,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:49:56,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:49:56,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:49:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:49:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:49:56,615 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 10:49:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:49:56,641 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2021-12-15 10:49:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:49:56,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-15 10:49:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:49:56,648 INFO L225 Difference]: With dead ends: 44 [2021-12-15 10:49:56,648 INFO L226 Difference]: Without dead ends: 23 [2021-12-15 10:49:56,650 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 10:49:56,653 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:49:56,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:49:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-15 10:49:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-12-15 10:49:56,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 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 10:49:56,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-15 10:49:56,686 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-15 10:49:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:49:56,686 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-15 10:49:56,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 10:49:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-15 10:49:56,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 10:49:56,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:49:56,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:49:56,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:49:56,688 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:49:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:49:56,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1195372026, now seen corresponding path program 1 times [2021-12-15 10:49:56,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:49:56,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101003347] [2021-12-15 10:49:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:49:56,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:49:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:49:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:49:56,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:49:56,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101003347] [2021-12-15 10:49:56,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101003347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:49:56,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780956962] [2021-12-15 10:49:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:49:56,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:49:56,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:49:56,723 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 10:49:56,724 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 10:49:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:49:56,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 10:49:56,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:49:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:49:56,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:49:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:49:56,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780956962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:49:56,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:49:56,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 10:49:56,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840721269] [2021-12-15 10:49:56,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:49:56,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 10:49:56,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:49:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 10:49:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:49:56,848 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 10:49:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:49:56,891 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-12-15 10:49:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:49:56,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 12 [2021-12-15 10:49:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:49:56,892 INFO L225 Difference]: With dead ends: 61 [2021-12-15 10:49:56,892 INFO L226 Difference]: Without dead ends: 52 [2021-12-15 10:49:56,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:49:56,894 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:49:56,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:49:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-15 10:49:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2021-12-15 10:49:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 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 10:49:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-12-15 10:49:56,898 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-12-15 10:49:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:49:56,899 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-12-15 10:49:56,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 10:49:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-12-15 10:49:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 10:49:56,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:49:56,900 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:49:56,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:49:57,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:49:57,116 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:49:57,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:49:57,117 INFO L85 PathProgramCache]: Analyzing trace with hash -328971648, now seen corresponding path program 2 times [2021-12-15 10:49:57,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:49:57,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030721264] [2021-12-15 10:49:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:49:57,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:49:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:49:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 10:49:57,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:49:57,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030721264] [2021-12-15 10:49:57,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030721264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:49:57,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:49:57,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:49:57,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096360920] [2021-12-15 10:49:57,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:49:57,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:49:57,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:49:57,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:49:57,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:49:57,172 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 10:49:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:49:57,193 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-12-15 10:49:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:49:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 18 [2021-12-15 10:49:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:49:57,194 INFO L225 Difference]: With dead ends: 28 [2021-12-15 10:49:57,194 INFO L226 Difference]: Without dead ends: 24 [2021-12-15 10:49:57,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 10:49:57,195 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:49:57,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:49:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-15 10:49:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-15 10:49:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 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 10:49:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-15 10:49:57,199 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2021-12-15 10:49:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:49:57,200 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-15 10:49:57,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 10:49:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-15 10:49:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 10:49:57,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:49:57,201 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:49:57,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:49:57,201 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:49:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:49:57,202 INFO L85 PathProgramCache]: Analyzing trace with hash 222661349, now seen corresponding path program 1 times [2021-12-15 10:49:57,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:49:57,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704819849] [2021-12-15 10:49:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:49:57,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:49:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:49:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 10:49:57,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:49:57,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704819849] [2021-12-15 10:49:57,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704819849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:49:57,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800945840] [2021-12-15 10:49:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:49:57,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:49:57,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:49:57,262 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 10:49:57,305 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 10:49:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:49:57,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:49:57,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:49:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:49:57,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:49:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:49:57,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800945840] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:49:57,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:49:57,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2021-12-15 10:49:57,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45211247] [2021-12-15 10:49:57,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:49:57,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 10:49:57,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:49:57,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 10:49:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-12-15 10:49:57,505 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 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 10:49:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:49:57,652 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2021-12-15 10:49:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 10:49:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 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 22 [2021-12-15 10:49:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:49:57,656 INFO L225 Difference]: With dead ends: 112 [2021-12-15 10:49:57,656 INFO L226 Difference]: Without dead ends: 92 [2021-12-15 10:49:57,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-12-15 10:49:57,659 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 148 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:49:57,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 68 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:49:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-15 10:49:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 51. [2021-12-15 10:49:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:49:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-12-15 10:49:57,679 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 22 [2021-12-15 10:49:57,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:49:57,680 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-12-15 10:49:57,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 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 10:49:57,680 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-12-15 10:49:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-15 10:49:57,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:49:57,681 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:49:57,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 10:49:57,900 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,SelfDestructingSolverStorable3 [2021-12-15 10:49:57,900 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:49:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:49:57,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1174972677, now seen corresponding path program 2 times [2021-12-15 10:49:57,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:49:57,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490852275] [2021-12-15 10:49:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:49:57,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:49:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:49:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-15 10:49:58,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:49:58,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490852275] [2021-12-15 10:49:58,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490852275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:49:58,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621747313] [2021-12-15 10:49:58,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:49:58,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:49:58,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:49:58,043 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 10:49:58,045 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 10:49:58,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:49:58,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:49:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 10:49:58,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:49:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-15 10:49:58,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:49:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-15 10:49:58,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621747313] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:49:58,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:49:58,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-15 10:49:58,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484002381] [2021-12-15 10:49:58,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:49:58,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 10:49:58,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:49:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 10:49:58,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 10:49:58,424 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 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 10:49:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:49:58,597 INFO L93 Difference]: Finished difference Result 240 states and 282 transitions. [2021-12-15 10:49:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 10:49:58,597 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 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 10:49:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:49:58,599 INFO L225 Difference]: With dead ends: 240 [2021-12-15 10:49:58,601 INFO L226 Difference]: Without dead ends: 212 [2021-12-15 10:49:58,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 10:49:58,603 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 557 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:49:58,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 113 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:49:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-15 10:49:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 75. [2021-12-15 10:49:58,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 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 10:49:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-12-15 10:49:58,622 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 50 [2021-12-15 10:49:58,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:49:58,623 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-12-15 10:49:58,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 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 10:49:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-12-15 10:49:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 10:49:58,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:49:58,626 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:49:58,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 10:49:58,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:49:58,848 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:49:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:49:58,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1782423069, now seen corresponding path program 3 times [2021-12-15 10:49:58,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:49:58,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088705292] [2021-12-15 10:49:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:49:58,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:49:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:49:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-15 10:49:59,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:49:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088705292] [2021-12-15 10:49:59,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088705292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:49:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612604752] [2021-12-15 10:49:59,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:49:59,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:49:59,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:49:59,384 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 10:49:59,385 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 10:49:59,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-15 10:49:59,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:49:59,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 10:49:59,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:49:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-15 10:49:59,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:49:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-15 10:49:59,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612604752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:49:59,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:49:59,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 33 [2021-12-15 10:49:59,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854108955] [2021-12-15 10:49:59,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:49:59,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 10:49:59,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:49:59,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 10:49:59,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 10:49:59,779 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 0 states have call successors, (0), 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 10:50:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:50:00,290 INFO L93 Difference]: Finished difference Result 263 states and 331 transitions. [2021-12-15 10:50:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-15 10:50:00,290 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 0 states have call successors, (0), 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 74 [2021-12-15 10:50:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:50:00,291 INFO L225 Difference]: With dead ends: 263 [2021-12-15 10:50:00,291 INFO L226 Difference]: Without dead ends: 187 [2021-12-15 10:50:00,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1146, Invalid=2046, Unknown=0, NotChecked=0, Total=3192 [2021-12-15 10:50:00,293 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 437 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:50:00,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 118 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:50:00,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-15 10:50:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-12-15 10:50:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.173913043478261) internal successors, (216), 184 states have internal predecessors, (216), 0 states have call successors, (0), 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 10:50:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 216 transitions. [2021-12-15 10:50:00,305 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 216 transitions. Word has length 74 [2021-12-15 10:50:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:50:00,307 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 216 transitions. [2021-12-15 10:50:00,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 0 states have call successors, (0), 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 10:50:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 216 transitions. [2021-12-15 10:50:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-15 10:50:00,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:50:00,311 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:50:00,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 10:50:00,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:50:00,528 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:50:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:50:00,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1491474595, now seen corresponding path program 4 times [2021-12-15 10:50:00,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:50:00,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840005916] [2021-12-15 10:50:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:50:00,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:50:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:50:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-15 10:50:00,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:50:00,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840005916] [2021-12-15 10:50:00,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840005916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:50:00,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815398876] [2021-12-15 10:50:00,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:50:00,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:50:00,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:50:00,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:50:00,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 10:50:01,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:50:01,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:50:01,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-15 10:50:01,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:50:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-15 10:50:01,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:50:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-15 10:50:02,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815398876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:50:02,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:50:02,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-12-15 10:50:02,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150723558] [2021-12-15 10:50:02,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:50:02,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-15 10:50:02,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:50:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-15 10:50:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-12-15 10:50:02,439 INFO L87 Difference]: Start difference. First operand 185 states and 216 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 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 10:50:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:50:03,023 INFO L93 Difference]: Finished difference Result 620 states and 743 transitions. [2021-12-15 10:50:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-15 10:50:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 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 184 [2021-12-15 10:50:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:50:03,025 INFO L225 Difference]: With dead ends: 620 [2021-12-15 10:50:03,025 INFO L226 Difference]: Without dead ends: 496 [2021-12-15 10:50:03,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-12-15 10:50:03,027 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1486 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:50:03,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 246 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 10:50:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-15 10:50:03,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 247. [2021-12-15 10:50:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.1300813008130082) internal successors, (278), 246 states have internal predecessors, (278), 0 states have call successors, (0), 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 10:50:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 278 transitions. [2021-12-15 10:50:03,038 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 278 transitions. Word has length 184 [2021-12-15 10:50:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:50:03,038 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 278 transitions. [2021-12-15 10:50:03,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 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 10:50:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 278 transitions. [2021-12-15 10:50:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-15 10:50:03,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:50:03,041 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:50:03,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-15 10:50:03,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:50:03,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:50:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:50:03,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1053396639, now seen corresponding path program 5 times [2021-12-15 10:50:03,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:50:03,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061543869] [2021-12-15 10:50:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:50:03,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:50:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:50:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-15 10:50:04,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:50:04,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061543869] [2021-12-15 10:50:04,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061543869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:50:04,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388388995] [2021-12-15 10:50:04,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:50:04,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:50:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:50:04,876 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:50:04,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process