./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/sum01-1.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 7bde49acbd83d331d6c1a7f9b5b50ee14f089f95 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:10:20,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:10:20,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:10:20,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:10:20,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:10:20,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:10:20,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:10:20,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:10:20,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:10:20,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:10:20,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:10:20,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:10:20,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:10:20,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:10:20,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:10:20,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:10:20,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:10:20,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:10:20,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:10:20,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:10:20,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:10:20,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:10:20,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:10:20,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:10:20,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:10:20,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:10:20,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:10:20,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:10:20,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:10:20,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:10:20,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:10:20,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:10:20,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:10:20,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:10:20,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:10:20,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:10:20,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:10:20,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:10:20,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:10:20,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:10:20,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:10:20,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:10:20,360 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:10:20,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:10:20,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:10:20,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:10:20,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:10:20,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:10:20,363 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:10:20,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:10:20,363 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:10:20,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:10:20,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:10:20,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:10:20,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:10:20,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:10:20,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:10:20,364 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:10:20,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:10:20,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:10:20,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:10:20,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:10:20,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:10:20,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:10:20,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:10:20,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:10:20,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:10:20,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:10:20,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:10:20,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:10:20,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:10:20,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:10:20,365 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bde49acbd83d331d6c1a7f9b5b50ee14f089f95 [2021-08-26 03:10:20,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:10:20,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:10:20,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:10:20,667 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:10:20,668 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:10:20,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01-1.i [2021-08-26 03:10:20,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d52acd83/60ea20e48a2142c4be268cbc4ea93534/FLAGc21632f71 [2021-08-26 03:10:21,112 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:10:21,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01-1.i [2021-08-26 03:10:21,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d52acd83/60ea20e48a2142c4be268cbc4ea93534/FLAGc21632f71 [2021-08-26 03:10:21,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d52acd83/60ea20e48a2142c4be268cbc4ea93534 [2021-08-26 03:10:21,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:10:21,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:10:21,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:10:21,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:10:21,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:10:21,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb5ed94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21, skipping insertion in model container [2021-08-26 03:10:21,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:10:21,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:10:21,273 WARN L228 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/sum01-1.i[808,821] [2021-08-26 03:10:21,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:10:21,289 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:10:21,325 WARN L228 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/sum01-1.i[808,821] [2021-08-26 03:10:21,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:10:21,339 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:10:21,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21 WrapperNode [2021-08-26 03:10:21,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:10:21,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:10:21,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:10:21,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:10:21,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:10:21,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:10:21,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:10:21,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:10:21,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:10:21,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:10:21,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:10:21,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:10:21,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (1/1) ... [2021-08-26 03:10:21,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:10:21,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:21,396 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) [2021-08-26 03:10:21,420 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 [2021-08-26 03:10:21,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:10:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:10:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:10:21,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:10:21,579 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:10:21,579 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 03:10:21,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:10:21 BoogieIcfgContainer [2021-08-26 03:10:21,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:10:21,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:10:21,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:10:21,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:10:21,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:10:21" (1/3) ... [2021-08-26 03:10:21,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110f448a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:10:21, skipping insertion in model container [2021-08-26 03:10:21,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:21" (2/3) ... [2021-08-26 03:10:21,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110f448a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:10:21, skipping insertion in model container [2021-08-26 03:10:21,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:10:21" (3/3) ... [2021-08-26 03:10:21,585 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2021-08-26 03:10:21,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:10:21,589 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:10:21,652 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:10:21,657 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 03:10:21,657 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:10:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:10:21,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:21,679 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:10:21,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:21,684 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-08-26 03:10:21,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:21,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491446] [2021-08-26 03:10:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:21,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:21,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:21,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491446] [2021-08-26 03:10:21,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491446] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:10:21,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:10:21,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 03:10:21,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241687244] [2021-08-26 03:10:21,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 03:10:21,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 03:10:21,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:10:21,880 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:21,889 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-08-26 03:10:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 03:10:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-08-26 03:10:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:21,895 INFO L225 Difference]: With dead ends: 19 [2021-08-26 03:10:21,895 INFO L226 Difference]: Without dead ends: 9 [2021-08-26 03:10:21,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:10:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-26 03:10:21,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-26 03:10:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-08-26 03:10:21,918 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-08-26 03:10:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:21,919 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-08-26 03:10:21,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:21,919 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-08-26 03:10:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:10:21,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:21,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:10:21,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:10:21,921 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:21,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2021-08-26 03:10:21,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:21,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029593554] [2021-08-26 03:10:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:21,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:22,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:22,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029593554] [2021-08-26 03:10:22,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029593554] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:10:22,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:10:22,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 03:10:22,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899757809] [2021-08-26 03:10:22,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:10:22,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:22,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:10:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:10:22,054 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:22,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:22,096 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-08-26 03:10:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:10:22,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-08-26 03:10:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:22,097 INFO L225 Difference]: With dead ends: 16 [2021-08-26 03:10:22,098 INFO L226 Difference]: Without dead ends: 12 [2021-08-26 03:10:22,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:10:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-26 03:10:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-26 03:10:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-08-26 03:10:22,102 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2021-08-26 03:10:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:22,102 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-08-26 03:10:22,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-08-26 03:10:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 03:10:22,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:22,103 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:22,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:10:22,104 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:22,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2021-08-26 03:10:22,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:22,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758285906] [2021-08-26 03:10:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:22,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:22,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:22,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758285906] [2021-08-26 03:10:22,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758285906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:22,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313539281] [2021-08-26 03:10:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:22,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:22,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:22,367 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) [2021-08-26 03:10:22,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:10:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:22,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 03:10:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:22,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313539281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:22,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:22,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-26 03:10:22,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755240411] [2021-08-26 03:10:22,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 03:10:22,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 03:10:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:10:22,659 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:22,759 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-08-26 03:10:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 03:10:22,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 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 9 [2021-08-26 03:10:22,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:22,760 INFO L225 Difference]: With dead ends: 26 [2021-08-26 03:10:22,760 INFO L226 Difference]: Without dead ends: 14 [2021-08-26 03:10:22,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:10:22,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-26 03:10:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-26 03:10:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-26 03:10:22,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-08-26 03:10:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:22,763 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-26 03:10:22,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-26 03:10:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 03:10:22,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:22,763 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:22,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:22,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:22,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:22,980 INFO L82 PathProgramCache]: Analyzing trace with hash 951667218, now seen corresponding path program 2 times [2021-08-26 03:10:22,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:22,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954143963] [2021-08-26 03:10:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:22,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:23,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:23,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954143963] [2021-08-26 03:10:23,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954143963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:23,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70273739] [2021-08-26 03:10:23,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:10:23,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:23,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:23,226 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) [2021-08-26 03:10:23,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:10:23,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:10:23,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:10:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 03:10:23,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:23,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70273739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:23,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:23,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-26 03:10:23,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846788406] [2021-08-26 03:10:23,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 03:10:23,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:23,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 03:10:23,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-26 03:10:23,601 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:23,835 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-08-26 03:10:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 03:10:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 03:10:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:23,836 INFO L225 Difference]: With dead ends: 32 [2021-08-26 03:10:23,836 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 03:10:23,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:10:23,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 03:10:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-08-26 03:10:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-08-26 03:10:23,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2021-08-26 03:10:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:23,839 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-08-26 03:10:23,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-08-26 03:10:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 03:10:23,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:23,839 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:23,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:24,057 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 [2021-08-26 03:10:24,057 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2024803054, now seen corresponding path program 3 times [2021-08-26 03:10:24,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:24,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031359041] [2021-08-26 03:10:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:24,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 03:10:24,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:24,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031359041] [2021-08-26 03:10:24,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031359041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:24,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128311638] [2021-08-26 03:10:24,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:10:24,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:24,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:24,214 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) [2021-08-26 03:10:24,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 03:10:24,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-26 03:10:24,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:10:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 03:10:24,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:24,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128311638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:24,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:24,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-08-26 03:10:24,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871612856] [2021-08-26 03:10:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 03:10:24,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 03:10:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:10:24,636 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:25,085 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-08-26 03:10:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 03:10:25,087 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 03:10:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:25,088 INFO L225 Difference]: With dead ends: 38 [2021-08-26 03:10:25,088 INFO L226 Difference]: Without dead ends: 27 [2021-08-26 03:10:25,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 03:10:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-26 03:10:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-08-26 03:10:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-26 03:10:25,091 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2021-08-26 03:10:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:25,091 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-26 03:10:25,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-26 03:10:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 03:10:25,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:25,092 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:25,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:25,312 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 [2021-08-26 03:10:25,312 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash -630976176, now seen corresponding path program 1 times [2021-08-26 03:10:25,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:25,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394743274] [2021-08-26 03:10:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:25,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:25,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:25,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394743274] [2021-08-26 03:10:25,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394743274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:25,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399196247] [2021-08-26 03:10:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:25,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:25,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:25,377 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) [2021-08-26 03:10:25,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 03:10:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:25,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:10:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:25,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399196247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:25,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:25,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-26 03:10:25,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986699821] [2021-08-26 03:10:25,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 03:10:25,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 03:10:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:10:25,529 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:25,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:25,557 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-08-26 03:10:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 03:10:25,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-08-26 03:10:25,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:25,560 INFO L225 Difference]: With dead ends: 37 [2021-08-26 03:10:25,560 INFO L226 Difference]: Without dead ends: 30 [2021-08-26 03:10:25,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:10:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-26 03:10:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-08-26 03:10:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-08-26 03:10:25,569 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2021-08-26 03:10:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:25,570 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-08-26 03:10:25,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-08-26 03:10:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 03:10:25,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:25,571 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:25,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:25,781 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 [2021-08-26 03:10:25,781 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1718177768, now seen corresponding path program 2 times [2021-08-26 03:10:25,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:25,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032249871] [2021-08-26 03:10:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:25,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:25,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:25,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032249871] [2021-08-26 03:10:25,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032249871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:25,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121645331] [2021-08-26 03:10:25,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:10:25,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:25,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:25,847 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) [2021-08-26 03:10:25,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 03:10:25,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:10:25,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:10:25,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:10:25,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:26,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121645331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:26,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:26,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-26 03:10:26,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215190530] [2021-08-26 03:10:26,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:10:26,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:26,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:10:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:10:26,033 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:26,063 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-08-26 03:10:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:10:26,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 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 27 [2021-08-26 03:10:26,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:26,065 INFO L225 Difference]: With dead ends: 40 [2021-08-26 03:10:26,066 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 03:10:26,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:10:26,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 03:10:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-08-26 03:10:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-08-26 03:10:26,078 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2021-08-26 03:10:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:26,078 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-08-26 03:10:26,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-08-26 03:10:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 03:10:26,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:26,079 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:26,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:26,292 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 [2021-08-26 03:10:26,293 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2102541392, now seen corresponding path program 3 times [2021-08-26 03:10:26,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:26,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663601952] [2021-08-26 03:10:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:26,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:26,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:26,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663601952] [2021-08-26 03:10:26,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663601952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:26,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122184318] [2021-08-26 03:10:26,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:10:26,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:26,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:26,361 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) [2021-08-26 03:10:26,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 03:10:26,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-26 03:10:26,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:10:26,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 03:10:26,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:26,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122184318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:26,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:26,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-26 03:10:26,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38242730] [2021-08-26 03:10:26,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 03:10:26,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 03:10:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:10:26,576 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:26,621 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-08-26 03:10:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 03:10:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 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 30 [2021-08-26 03:10:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:26,624 INFO L225 Difference]: With dead ends: 43 [2021-08-26 03:10:26,624 INFO L226 Difference]: Without dead ends: 36 [2021-08-26 03:10:26,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:10:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-26 03:10:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-08-26 03:10:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-08-26 03:10:26,629 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2021-08-26 03:10:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:26,629 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-08-26 03:10:26,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-08-26 03:10:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 03:10:26,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:26,630 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:26,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:26,844 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 [2021-08-26 03:10:26,845 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:26,845 INFO L82 PathProgramCache]: Analyzing trace with hash -76241640, now seen corresponding path program 4 times [2021-08-26 03:10:26,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:26,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493446761] [2021-08-26 03:10:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:26,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:26,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:26,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493446761] [2021-08-26 03:10:26,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493446761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:26,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926005430] [2021-08-26 03:10:26,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:10:26,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:26,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:26,921 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) [2021-08-26 03:10:26,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 03:10:27,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:10:27,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:10:27,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 03:10:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:27,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926005430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:27,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:27,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-26 03:10:27,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257452022] [2021-08-26 03:10:27,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 03:10:27,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 03:10:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:10:27,143 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:27,179 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-08-26 03:10:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 03:10:27,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 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 33 [2021-08-26 03:10:27,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:27,180 INFO L225 Difference]: With dead ends: 46 [2021-08-26 03:10:27,181 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 03:10:27,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:10:27,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 03:10:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-08-26 03:10:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-08-26 03:10:27,184 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2021-08-26 03:10:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:27,184 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-08-26 03:10:27,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-08-26 03:10:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 03:10:27,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:27,185 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:27,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:27,401 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 [2021-08-26 03:10:27,402 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:27,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1639196496, now seen corresponding path program 5 times [2021-08-26 03:10:27,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:27,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569925661] [2021-08-26 03:10:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:27,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:10:27,413 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 03:10:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:10:27,445 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 03:10:27,445 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 03:10:27,446 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:10:27,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-26 03:10:27,452 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:10:27,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:10:27 BoogieIcfgContainer [2021-08-26 03:10:27,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:10:27,475 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:10:27,475 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:10:27,476 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:10:27,476 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:10:21" (3/4) ... [2021-08-26 03:10:27,477 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 03:10:27,504 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:10:27,504 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:10:27,505 INFO L168 Benchmark]: Toolchain (without parser) took 6367.79 ms. Allocated memory was 58.7 MB in the beginning and 107.0 MB in the end (delta: 48.2 MB). Free memory was 37.6 MB in the beginning and 83.4 MB in the end (delta: -45.8 MB). Peak memory consumption was 876.3 kB. Max. memory is 16.1 GB. [2021-08-26 03:10:27,506 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 58.7 MB. Free memory was 40.9 MB in the beginning and 40.8 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:10:27,506 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.33 ms. Allocated memory is still 58.7 MB. Free memory was 37.5 MB in the beginning and 42.1 MB in the end (delta: -4.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:10:27,506 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.94 ms. Allocated memory is still 58.7 MB. Free memory was 42.1 MB in the beginning and 40.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:10:27,506 INFO L168 Benchmark]: Boogie Preprocessor took 11.58 ms. Allocated memory is still 58.7 MB. Free memory was 40.8 MB in the beginning and 39.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:10:27,507 INFO L168 Benchmark]: RCFGBuilder took 207.56 ms. Allocated memory is still 58.7 MB. Free memory was 39.7 MB in the beginning and 28.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 03:10:27,507 INFO L168 Benchmark]: TraceAbstraction took 5893.69 ms. Allocated memory was 58.7 MB in the beginning and 107.0 MB in the end (delta: 48.2 MB). Free memory was 28.3 MB in the beginning and 86.5 MB in the end (delta: -58.2 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:10:27,507 INFO L168 Benchmark]: Witness Printer took 29.20 ms. Allocated memory is still 107.0 MB. Free memory was 86.5 MB in the beginning and 83.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:10:27,508 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 58.7 MB. Free memory was 40.9 MB in the beginning and 40.8 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 199.33 ms. Allocated memory is still 58.7 MB. Free memory was 37.5 MB in the beginning and 42.1 MB in the end (delta: -4.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 19.94 ms. Allocated memory is still 58.7 MB. Free memory was 42.1 MB in the beginning and 40.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.58 ms. Allocated memory is still 58.7 MB. Free memory was 40.8 MB in the beginning and 39.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 207.56 ms. Allocated memory is still 58.7 MB. Free memory was 39.7 MB in the beginning and 28.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5893.69 ms. Allocated memory was 58.7 MB in the beginning and 107.0 MB in the end (delta: 48.2 MB). Free memory was 28.3 MB in the beginning and 86.5 MB in the end (delta: -58.2 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.1 GB. * Witness Printer took 29.20 ms. Allocated memory is still 107.0 MB. Free memory was 86.5 MB in the beginning and 83.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND FALSE !(i<10) [L24] i++ [L24] COND FALSE !(i<=n) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5799.9ms, OverallIterations: 10, TraceHistogramMax: 10, EmptinessCheckTime: 19.7ms, AutomataDifference: 1024.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 61 SDtfs, 76 SDslu, 156 SDs, 0 SdLazy, 632 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 318.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 251 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1199.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=9, InterpolantAutomatonStates: 91, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.9ms AutomataMinimizationTime, 9 MinimizatonAttempts, 7 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 56.3ms SsaConstructionTime, 214.6ms SatisfiabilityAnalysisTime, 2250.7ms InterpolantComputationTime, 354 NumberOfCodeBlocks, 354 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 302 ConstructedInterpolants, 0 QuantifiedInterpolants, 1276 SizeOfPredicates, 12 NumberOfNonLiveVariables, 487 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 117/716 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 03:10:27,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...