./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/loops/n.c24.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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:34:15,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:34:15,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:34:15,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:34:15,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:34:15,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:34:15,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:34:15,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:34:15,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:34:15,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:34:15,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:34:15,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:34:15,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:34:15,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:34:15,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:34:15,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:34:15,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:34:15,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:34:15,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:34:15,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:34:15,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:34:15,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:34:15,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:34:15,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:34:15,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:34:15,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:34:15,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:34:15,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:34:15,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:34:15,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:34:15,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:34:15,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:34:15,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:34:15,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:34:15,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:34:15,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:34:15,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:34:15,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:34:15,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:34:15,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:34:15,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:34:15,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:34:15,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:34:15,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:34:15,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:34:15,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:34:15,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:34:15,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:34:15,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:34:15,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:34:15,290 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:34:15,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:34:15,290 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:34:15,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:34:15,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:34:15,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:34:15,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:34:15,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:34:15,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:34:15,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:34:15,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:34:15,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:34:15,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:34:15,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:34:15,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:34:15,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:34:15,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:34:15,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:34:15,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:34:15,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:34:15,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:34:15,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:34:15,293 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:34:15,294 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:34:15,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:34:15,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:34:15,294 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2021-12-17 09:34:15,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:34:15,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:34:15,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:34:15,504 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:34:15,505 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:34:15,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/n.c24.i [2021-12-17 09:34:15,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/098ab15f1/1ab90395446a4643a2aafb4e85af9ad8/FLAGa22a43733 [2021-12-17 09:34:15,936 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:34:15,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i [2021-12-17 09:34:15,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/098ab15f1/1ab90395446a4643a2aafb4e85af9ad8/FLAGa22a43733 [2021-12-17 09:34:15,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/098ab15f1/1ab90395446a4643a2aafb4e85af9ad8 [2021-12-17 09:34:15,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:34:15,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:34:15,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:34:15,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:34:15,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:34:15,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:34:15" (1/1) ... [2021-12-17 09:34:15,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a861dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:15, skipping insertion in model container [2021-12-17 09:34:15,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:34:15" (1/1) ... [2021-12-17 09:34:15,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:34:15,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:34:16,115 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/loops/n.c24.i[805,818] [2021-12-17 09:34:16,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:34:16,150 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:34:16,158 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/loops/n.c24.i[805,818] [2021-12-17 09:34:16,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:34:16,182 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:34:16,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16 WrapperNode [2021-12-17 09:34:16,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:34:16,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:34:16,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:34:16,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:34:16,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (1/1) ... [2021-12-17 09:34:16,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (1/1) ... [2021-12-17 09:34:16,223 INFO L137 Inliner]: procedures = 68, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 146 [2021-12-17 09:34:16,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:34:16,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:34:16,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:34:16,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:34:16,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (1/1) ... [2021-12-17 09:34:16,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (1/1) ... [2021-12-17 09:34:16,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (1/1) ... [2021-12-17 09:34:16,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (1/1) ... [2021-12-17 09:34:16,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (1/1) ... [2021-12-17 09:34:16,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (1/1) ... [2021-12-17 09:34:16,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (1/1) ... [2021-12-17 09:34:16,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:34:16,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:34:16,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:34:16,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:34:16,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (1/1) ... [2021-12-17 09:34:16,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:34:16,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:34:16,278 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) [2021-12-17 09:34:16,280 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 [2021-12-17 09:34:16,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:34:16,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-17 09:34:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 09:34:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 09:34:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 09:34:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 09:34:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:34:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-17 09:34:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:34:16,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:34:16,379 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:34:16,380 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:34:16,544 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:34:16,548 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:34:16,549 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 09:34:16,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:34:16 BoogieIcfgContainer [2021-12-17 09:34:16,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:34:16,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:34:16,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:34:16,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:34:16,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:34:15" (1/3) ... [2021-12-17 09:34:16,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc81e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:34:16, skipping insertion in model container [2021-12-17 09:34:16,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:34:16" (2/3) ... [2021-12-17 09:34:16,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc81e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:34:16, skipping insertion in model container [2021-12-17 09:34:16,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:34:16" (3/3) ... [2021-12-17 09:34:16,561 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2021-12-17 09:34:16,565 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:34:16,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:34:16,614 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:34:16,618 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 [2021-12-17 09:34:16,619 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:34:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 09:34:16,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:34:16,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:34:16,658 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:34:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:34:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash 214843119, now seen corresponding path program 1 times [2021-12-17 09:34:16,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:34:16,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336246118] [2021-12-17 09:34:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:34:16,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:34:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:34:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:34:16,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:34:16,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336246118] [2021-12-17 09:34:16,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336246118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:34:16,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:34:16,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:34:16,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440416844] [2021-12-17 09:34:16,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:34:16,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:34:16,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:34:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:34:16,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:34:16,823 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 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) [2021-12-17 09:34:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:34:16,894 INFO L93 Difference]: Finished difference Result 90 states and 141 transitions. [2021-12-17 09:34:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:34:16,896 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 [2021-12-17 09:34:16,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:34:16,906 INFO L225 Difference]: With dead ends: 90 [2021-12-17 09:34:16,906 INFO L226 Difference]: Without dead ends: 53 [2021-12-17 09:34:16,908 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 [2021-12-17 09:34:16,913 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:34:16,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 74 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:34:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-17 09:34:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2021-12-17 09:34:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-12-17 09:34:16,938 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 8 [2021-12-17 09:34:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:34:16,939 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-12-17 09:34:16,939 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) [2021-12-17 09:34:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-12-17 09:34:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 09:34:16,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:34:16,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:34:16,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:34:16,942 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:34:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:34:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash 979779318, now seen corresponding path program 1 times [2021-12-17 09:34:16,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:34:16,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759976764] [2021-12-17 09:34:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:34:16,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:34:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:34:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 09:34:17,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:34:17,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759976764] [2021-12-17 09:34:17,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759976764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:34:17,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296930644] [2021-12-17 09:34:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:34:17,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:34:17,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:34:17,052 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) [2021-12-17 09:34:17,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 09:34:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:34:17,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 09:34:17,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:34:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 09:34:17,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:34:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 09:34:17,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296930644] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:34:17,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:34:17,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-17 09:34:17,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324747416] [2021-12-17 09:34:17,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:34:17,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 09:34:17,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:34:17,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 09:34:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:34:17,181 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-12-17 09:34:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:34:17,265 INFO L93 Difference]: Finished difference Result 128 states and 180 transitions. [2021-12-17 09:34:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 09:34:17,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) Word has length 15 [2021-12-17 09:34:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:34:17,266 INFO L225 Difference]: With dead ends: 128 [2021-12-17 09:34:17,267 INFO L226 Difference]: Without dead ends: 101 [2021-12-17 09:34:17,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:34:17,268 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:34:17,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 116 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:34:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-17 09:34:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-17 09:34:17,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.38) internal successors, (138), 100 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 138 transitions. [2021-12-17 09:34:17,276 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 138 transitions. Word has length 15 [2021-12-17 09:34:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:34:17,277 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 138 transitions. [2021-12-17 09:34:17,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-12-17 09:34:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 138 transitions. [2021-12-17 09:34:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 09:34:17,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:34:17,278 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:34:17,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 09:34:17,496 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 [2021-12-17 09:34:17,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:34:17,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:34:17,498 INFO L85 PathProgramCache]: Analyzing trace with hash -15587406, now seen corresponding path program 2 times [2021-12-17 09:34:17,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:34:17,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681057377] [2021-12-17 09:34:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:34:17,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:34:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:34:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 09:34:17,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:34:17,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681057377] [2021-12-17 09:34:17,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681057377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:34:17,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:34:17,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 09:34:17,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298852500] [2021-12-17 09:34:17,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:34:17,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 09:34:17,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:34:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 09:34:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 09:34:17,598 INFO L87 Difference]: Start difference. First operand 101 states and 138 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:17,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:34:17,634 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2021-12-17 09:34:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 09:34:17,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 36 [2021-12-17 09:34:17,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:34:17,638 INFO L225 Difference]: With dead ends: 187 [2021-12-17 09:34:17,638 INFO L226 Difference]: Without dead ends: 183 [2021-12-17 09:34:17,639 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 [2021-12-17 09:34:17,639 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:34:17,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 111 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:34:17,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-17 09:34:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 102. [2021-12-17 09:34:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.386138613861386) internal successors, (140), 101 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2021-12-17 09:34:17,648 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 36 [2021-12-17 09:34:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:34:17,648 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2021-12-17 09:34:17,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2021-12-17 09:34:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 09:34:17,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:34:17,649 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:34:17,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 09:34:17,650 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:34:17,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:34:17,650 INFO L85 PathProgramCache]: Analyzing trace with hash -569704896, now seen corresponding path program 1 times [2021-12-17 09:34:17,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:34:17,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593471988] [2021-12-17 09:34:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:34:17,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:34:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:34:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 09:34:17,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:34:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593471988] [2021-12-17 09:34:17,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593471988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:34:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61272524] [2021-12-17 09:34:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:34:17,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:34:17,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:34:17,753 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) [2021-12-17 09:34:17,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 09:34:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:34:17,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 09:34:17,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:34:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 09:34:17,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:34:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 09:34:18,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61272524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:34:18,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:34:18,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-17 09:34:18,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766424532] [2021-12-17 09:34:18,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:34:18,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 09:34:18,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:34:18,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 09:34:18,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-17 09:34:18,018 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:34:18,130 INFO L93 Difference]: Finished difference Result 351 states and 498 transitions. [2021-12-17 09:34:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 09:34:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 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 41 [2021-12-17 09:34:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:34:18,131 INFO L225 Difference]: With dead ends: 351 [2021-12-17 09:34:18,131 INFO L226 Difference]: Without dead ends: 260 [2021-12-17 09:34:18,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-17 09:34:18,133 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 653 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:34:18,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 280 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:34:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-17 09:34:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 240. [2021-12-17 09:34:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.389121338912134) internal successors, (332), 239 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 332 transitions. [2021-12-17 09:34:18,147 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 332 transitions. Word has length 41 [2021-12-17 09:34:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:34:18,147 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 332 transitions. [2021-12-17 09:34:18,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 332 transitions. [2021-12-17 09:34:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 09:34:18,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:34:18,149 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:34:18,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 09:34:18,375 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 [2021-12-17 09:34:18,375 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:34:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:34:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash 663811572, now seen corresponding path program 2 times [2021-12-17 09:34:18,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:34:18,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564461865] [2021-12-17 09:34:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:34:18,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:34:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:34:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 09:34:18,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:34:18,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564461865] [2021-12-17 09:34:18,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564461865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:34:18,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934510124] [2021-12-17 09:34:18,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:34:18,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:34:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:34:18,509 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) [2021-12-17 09:34:18,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 09:34:18,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:34:18,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:34:18,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 09:34:18,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:34:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 09:34:18,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:34:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 09:34:18,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934510124] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:34:18,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:34:18,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-17 09:34:18,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443551013] [2021-12-17 09:34:18,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:34:18,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 09:34:18,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:34:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 09:34:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-17 09:34:18,977 INFO L87 Difference]: Start difference. First operand 240 states and 332 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:34:19,227 INFO L93 Difference]: Finished difference Result 771 states and 1098 transitions. [2021-12-17 09:34:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 09:34:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 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 83 [2021-12-17 09:34:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:34:19,230 INFO L225 Difference]: With dead ends: 771 [2021-12-17 09:34:19,230 INFO L226 Difference]: Without dead ends: 554 [2021-12-17 09:34:19,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-17 09:34:19,263 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2440 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:34:19,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2440 Valid, 544 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 09:34:19,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-12-17 09:34:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 516. [2021-12-17 09:34:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.3902912621359222) internal successors, (716), 515 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 716 transitions. [2021-12-17 09:34:19,282 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 716 transitions. Word has length 83 [2021-12-17 09:34:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:34:19,282 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 716 transitions. [2021-12-17 09:34:19,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 716 transitions. [2021-12-17 09:34:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 09:34:19,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:34:19,288 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:34:19,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 09:34:19,503 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 [2021-12-17 09:34:19,503 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:34:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:34:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1319385436, now seen corresponding path program 3 times [2021-12-17 09:34:19,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:34:19,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254074253] [2021-12-17 09:34:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:34:19,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:34:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:34:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2021-12-17 09:34:19,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:34:19,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254074253] [2021-12-17 09:34:19,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254074253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:34:19,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869650322] [2021-12-17 09:34:19,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:34:19,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:34:19,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:34:19,838 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) [2021-12-17 09:34:19,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 09:34:19,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 09:34:19,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:34:19,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 09:34:19,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:34:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2021-12-17 09:34:20,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:34:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2021-12-17 09:34:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869650322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:34:20,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:34:20,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2021-12-17 09:34:20,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741660167] [2021-12-17 09:34:20,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:34:20,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 09:34:20,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:34:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 09:34:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2021-12-17 09:34:20,460 INFO L87 Difference]: Start difference. First operand 516 states and 716 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:34:25,058 INFO L93 Difference]: Finished difference Result 2608 states and 3704 transitions. [2021-12-17 09:34:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-12-17 09:34:25,058 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-12-17 09:34:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:34:25,066 INFO L225 Difference]: With dead ends: 2608 [2021-12-17 09:34:25,066 INFO L226 Difference]: Without dead ends: 2133 [2021-12-17 09:34:25,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 374 SyntacticMatches, 25 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13348 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8185, Invalid=22265, Unknown=0, NotChecked=0, Total=30450 [2021-12-17 09:34:25,079 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 12678 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12678 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 09:34:25,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12678 Valid, 672 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [960 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 09:34:25,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-12-17 09:34:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 590. [2021-12-17 09:34:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.4023769100169778) internal successors, (826), 589 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 826 transitions. [2021-12-17 09:34:25,114 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 826 transitions. Word has length 167 [2021-12-17 09:34:25,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:34:25,116 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 826 transitions. [2021-12-17 09:34:25,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 826 transitions. [2021-12-17 09:34:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-17 09:34:25,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:34:25,123 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:34:25,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 09:34:25,340 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 [2021-12-17 09:34:25,340 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:34:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:34:25,341 INFO L85 PathProgramCache]: Analyzing trace with hash 914783370, now seen corresponding path program 4 times [2021-12-17 09:34:25,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:34:25,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60170955] [2021-12-17 09:34:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:34:25,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:34:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:34:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2021-12-17 09:34:25,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:34:25,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60170955] [2021-12-17 09:34:25,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60170955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:34:25,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222988517] [2021-12-17 09:34:25,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 09:34:25,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:34:25,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:34:25,625 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) [2021-12-17 09:34:25,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 09:34:25,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 09:34:25,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:34:25,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 09:34:25,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:34:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2021-12-17 09:34:25,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:34:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2021-12-17 09:34:26,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222988517] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:34:26,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:34:26,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-17 09:34:26,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417757193] [2021-12-17 09:34:26,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:34:26,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 09:34:26,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:34:26,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 09:34:26,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 09:34:26,787 INFO L87 Difference]: Start difference. First operand 590 states and 826 transitions. Second operand has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:27,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:34:27,822 INFO L93 Difference]: Finished difference Result 3058 states and 4504 transitions. [2021-12-17 09:34:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-17 09:34:27,822 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 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 189 [2021-12-17 09:34:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:34:27,830 INFO L225 Difference]: With dead ends: 3058 [2021-12-17 09:34:27,831 INFO L226 Difference]: Without dead ends: 2517 [2021-12-17 09:34:27,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 09:34:27,833 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 4625 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4625 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 09:34:27,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4625 Valid, 1212 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 09:34:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-12-17 09:34:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1165. [2021-12-17 09:34:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 1.3969072164948453) internal successors, (1626), 1164 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1626 transitions. [2021-12-17 09:34:27,875 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1626 transitions. Word has length 189 [2021-12-17 09:34:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:34:27,876 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 1626 transitions. [2021-12-17 09:34:27,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:34:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1626 transitions. [2021-12-17 09:34:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-12-17 09:34:27,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:34:27,880 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:34:27,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 09:34:28,095 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 [2021-12-17 09:34:28,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:34:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:34:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash 892851466, now seen corresponding path program 5 times [2021-12-17 09:34:28,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:34:28,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428174375] [2021-12-17 09:34:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:34:28,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:34:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:34:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2021-12-17 09:34:29,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:34:29,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428174375] [2021-12-17 09:34:29,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428174375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:34:29,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199931604] [2021-12-17 09:34:29,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 09:34:29,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:34:29,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:34:29,160 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) [2021-12-17 09:34:29,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 09:35:04,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-12-17 09:35:04,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:35:04,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-17 09:35:04,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:35:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2021-12-17 09:35:04,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:35:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2021-12-17 09:35:07,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199931604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:35:07,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:35:07,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2021-12-17 09:35:07,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896496264] [2021-12-17 09:35:07,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:35:07,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-17 09:35:07,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:35:07,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-17 09:35:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 09:35:07,169 INFO L87 Difference]: Start difference. First operand 1165 states and 1626 transitions. Second operand has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:35:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:35:14,025 INFO L93 Difference]: Finished difference Result 6083 states and 8954 transitions. [2021-12-17 09:35:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-17 09:35:14,026 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 364 [2021-12-17 09:35:14,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:35:14,039 INFO L225 Difference]: With dead ends: 6083 [2021-12-17 09:35:14,039 INFO L226 Difference]: Without dead ends: 5017 [2021-12-17 09:35:14,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-17 09:35:14,043 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 10074 mSDsluCounter, 2372 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10074 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 09:35:14,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10074 Valid, 2404 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 09:35:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5017 states. [2021-12-17 09:35:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5017 to 2315. [2021-12-17 09:35:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 1.3941227312013829) internal successors, (3226), 2314 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:35:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3226 transitions. [2021-12-17 09:35:14,116 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3226 transitions. Word has length 364 [2021-12-17 09:35:14,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:35:14,117 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 3226 transitions. [2021-12-17 09:35:14,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:35:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3226 transitions. [2021-12-17 09:35:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2021-12-17 09:35:14,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:35:14,128 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:35:14,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 09:35:14,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:35:14,343 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:35:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:35:14,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1941301934, now seen corresponding path program 6 times [2021-12-17 09:35:14,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:35:14,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566220410] [2021-12-17 09:35:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:35:14,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:35:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:35:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 24285 trivial. 0 not checked. [2021-12-17 09:35:16,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:35:16,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566220410] [2021-12-17 09:35:16,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566220410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:35:16,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854185772] [2021-12-17 09:35:16,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 09:35:16,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:35:16,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:35:16,884 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:35:16,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 09:35:17,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-17 09:35:17,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:35:17,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 09:35:17,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:35:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 680 proven. 34 refuted. 0 times theorem prover too weak. 33175 trivial. 0 not checked. [2021-12-17 09:35:17,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:35:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 680 proven. 34 refuted. 0 times theorem prover too weak. 33175 trivial. 0 not checked. [2021-12-17 09:35:18,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854185772] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:35:18,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:35:18,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 9, 9] total 114 [2021-12-17 09:35:18,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223581343] [2021-12-17 09:35:18,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:35:18,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-17 09:35:18,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:35:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-17 09:35:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5124, Invalid=7758, Unknown=0, NotChecked=0, Total=12882 [2021-12-17 09:35:18,800 INFO L87 Difference]: Start difference. First operand 2315 states and 3226 transitions. Second operand has 114 states, 114 states have (on average 2.412280701754386) internal successors, (275), 114 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:43:56,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:43:56,472 INFO L93 Difference]: Finished difference Result 23013 states and 33038 transitions. [2021-12-17 09:43:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1606 states. [2021-12-17 09:43:56,472 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.412280701754386) internal successors, (275), 114 states have internal predecessors, (275), 0 states have call successors, (0), 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 714 [2021-12-17 09:43:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:43:56,560 INFO L225 Difference]: With dead ends: 23013 [2021-12-17 09:43:56,560 INFO L226 Difference]: Without dead ends: 20885 [2021-12-17 09:43:56,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3629 GetRequests, 2013 SyntacticMatches, 5 SemanticMatches, 1611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215696 ImplicationChecksByTransitivity, 199.7s TimeCoverageRelationStatistics Valid=622974, Invalid=1977182, Unknown=0, NotChecked=0, Total=2600156 [2021-12-17 09:43:56,796 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 204931 mSDsluCounter, 2357 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 15577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204931 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 16832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 15577 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:43:56,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204931 Valid, 2387 Invalid, 16832 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [15577 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-17 09:43:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20885 states. [2021-12-17 09:43:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20885 to 2440. [2021-12-17 09:43:57,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 1.3997539975399753) internal successors, (3414), 2439 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:43:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3414 transitions. [2021-12-17 09:43:57,011 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3414 transitions. Word has length 714 [2021-12-17 09:43:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:43:57,012 INFO L470 AbstractCegarLoop]: Abstraction has 2440 states and 3414 transitions. [2021-12-17 09:43:57,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.412280701754386) internal successors, (275), 114 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:43:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3414 transitions. [2021-12-17 09:43:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2021-12-17 09:43:57,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:43:57,019 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:43:57,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 09:43:57,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:43:57,238 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:43:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:43:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1505500494, now seen corresponding path program 7 times [2021-12-17 09:43:57,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:43:57,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690038197] [2021-12-17 09:43:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:43:57,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:43:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 35370 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25569 trivial. 0 not checked. [2021-12-17 09:44:00,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:44:00,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690038197] [2021-12-17 09:44:00,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690038197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:44:00,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769788926] [2021-12-17 09:44:00,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 09:44:00,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:44:00,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:44:00,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:44:00,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 09:44:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-17 09:44:00,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:44:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 35370 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25569 trivial. 0 not checked. [2021-12-17 09:44:02,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:44:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 35370 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25569 trivial. 0 not checked. [2021-12-17 09:44:08,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769788926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:44:08,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:44:08,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2021-12-17 09:44:08,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644442588] [2021-12-17 09:44:08,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:44:08,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-17 09:44:08,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:44:08,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-17 09:44:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-17 09:44:08,919 INFO L87 Difference]: Start difference. First operand 2440 states and 3414 transitions. Second operand has 203 states, 203 states have (on average 2.064039408866995) internal successors, (419), 203 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:45:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:45:37,394 INFO L93 Difference]: Finished difference Result 22760 states and 34100 transitions. [2021-12-17 09:45:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-17 09:45:37,394 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.064039408866995) internal successors, (419), 203 states have internal predecessors, (419), 0 states have call successors, (0), 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 751 [2021-12-17 09:45:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:45:37,427 INFO L225 Difference]: With dead ends: 22760 [2021-12-17 09:45:37,428 INFO L226 Difference]: Without dead ends: 20521 [2021-12-17 09:45:37,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1602 GetRequests, 1401 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-17 09:45:37,436 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 29184 mSDsluCounter, 4796 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29184 SdHoareTripleChecker+Valid, 4828 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 09:45:37,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29184 Valid, 4828 Invalid, 2817 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1205 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 09:45:37,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20521 states. [2021-12-17 09:45:37,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20521 to 4763. [2021-12-17 09:45:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4762 states have (on average 1.3956320873582528) internal successors, (6646), 4762 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:45:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 6646 transitions. [2021-12-17 09:45:37,759 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 6646 transitions. Word has length 751 [2021-12-17 09:45:37,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:45:37,759 INFO L470 AbstractCegarLoop]: Abstraction has 4763 states and 6646 transitions. [2021-12-17 09:45:37,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.064039408866995) internal successors, (419), 203 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:45:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 6646 transitions. [2021-12-17 09:45:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1459 [2021-12-17 09:45:37,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:45:37,774 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 200, 200, 200, 200, 200, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:45:37,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 09:45:37,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 09:45:37,995 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:45:37,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:45:37,995 INFO L85 PathProgramCache]: Analyzing trace with hash -605204102, now seen corresponding path program 8 times [2021-12-17 09:45:37,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:45:37,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95501592] [2021-12-17 09:45:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:45:37,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:45:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:45:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 141925 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 101925 trivial. 0 not checked. [2021-12-17 09:45:50,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:45:50,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95501592] [2021-12-17 09:45:50,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95501592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:45:50,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591084974] [2021-12-17 09:45:50,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:45:50,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:45:50,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:45:50,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:45:50,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 09:45:51,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:45:51,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:45:51,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 5528 conjuncts, 202 conjunts are in the unsatisfiable core [2021-12-17 09:45:51,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:45:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 141925 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 101925 trivial. 0 not checked. [2021-12-17 09:45:52,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:46:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 141925 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 101925 trivial. 0 not checked. [2021-12-17 09:46:15,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591084974] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:46:15,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:46:15,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2021-12-17 09:46:15,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100017750] [2021-12-17 09:46:15,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:46:15,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-12-17 09:46:15,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-12-17 09:46:15,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2021-12-17 09:46:15,296 INFO L87 Difference]: Start difference. First operand 4763 states and 6646 transitions. Second operand has 405 states, 405 states have (on average 2.0320987654320986) internal successors, (823), 405 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15