./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01_bug02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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_bug02.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 67768b34e7b9299b4c0862a201d7fe793c7261b3 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-5485861 [2020-10-25 22:17:20,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:17:20,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:17:20,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:17:20,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:17:20,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:17:20,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:17:20,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:17:20,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:17:20,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:17:20,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:17:20,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:17:20,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:17:20,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:17:20,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:17:20,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:17:20,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:17:20,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:17:20,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:17:20,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:17:20,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:17:20,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:17:20,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:17:20,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:17:20,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:17:20,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:17:20,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:17:20,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:17:20,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:17:20,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:17:20,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:17:20,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:17:20,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:17:20,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:17:20,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:17:20,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:17:20,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:17:20,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:17:20,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:17:20,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:17:20,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:17:20,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:17:20,384 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:17:20,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:17:20,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:17:20,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:17:20,386 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:17:20,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:17:20,387 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:17:20,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:17:20,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:17:20,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:17:20,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:17:20,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:17:20,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:17:20,390 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:17:20,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:17:20,391 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:17:20,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:17:20,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:17:20,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:17:20,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:17:20,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:17:20,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:17:20,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:17:20,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:17:20,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:17:20,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:17:20,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:17:20,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:17:20,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:17:20,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67768b34e7b9299b4c0862a201d7fe793c7261b3 [2020-10-25 22:17:20,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:17:20,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:17:20,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:17:20,804 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:17:20,805 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:17:20,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02.i [2020-10-25 22:17:20,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3436edb/cc7853aa737b48b0af7fbfcf2324fd65/FLAGdd7f4a485 [2020-10-25 22:17:21,459 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:17:21,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i [2020-10-25 22:17:21,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3436edb/cc7853aa737b48b0af7fbfcf2324fd65/FLAGdd7f4a485 [2020-10-25 22:17:21,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc3436edb/cc7853aa737b48b0af7fbfcf2324fd65 [2020-10-25 22:17:21,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:17:21,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:17:21,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:17:21,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:17:21,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:17:21,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:17:21" (1/1) ... [2020-10-25 22:17:21,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@410f9cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:21, skipping insertion in model container [2020-10-25 22:17:21,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:17:21" (1/1) ... [2020-10-25 22:17:21,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:17:21,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:17:22,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:17:22,104 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:17:22,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:17:22,153 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:17:22,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22 WrapperNode [2020-10-25 22:17:22,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:17:22,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:17:22,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:17:22,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:17:22,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (1/1) ... [2020-10-25 22:17:22,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (1/1) ... [2020-10-25 22:17:22,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:17:22,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:17:22,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:17:22,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:17:22,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (1/1) ... [2020-10-25 22:17:22,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (1/1) ... [2020-10-25 22:17:22,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (1/1) ... [2020-10-25 22:17:22,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (1/1) ... [2020-10-25 22:17:22,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (1/1) ... [2020-10-25 22:17:22,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (1/1) ... [2020-10-25 22:17:22,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (1/1) ... [2020-10-25 22:17:22,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:17:22,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:17:22,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:17:22,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:17:22,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:17:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:17:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:17:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:17:22,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:17:22,625 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:17:22,625 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-25 22:17:22,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:17:22 BoogieIcfgContainer [2020-10-25 22:17:22,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:17:22,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:17:22,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:17:22,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:17:22,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:17:21" (1/3) ... [2020-10-25 22:17:22,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c4652a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:17:22, skipping insertion in model container [2020-10-25 22:17:22,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:17:22" (2/3) ... [2020-10-25 22:17:22,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c4652a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:17:22, skipping insertion in model container [2020-10-25 22:17:22,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:17:22" (3/3) ... [2020-10-25 22:17:22,648 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-10-25 22:17:22,679 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:17:22,687 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:17:22,719 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:17:22,783 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:17:22,783 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:17:22,784 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:17:22,784 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:17:22,784 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:17:22,785 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:17:22,785 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:17:22,785 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:17:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-10-25 22:17:22,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-25 22:17:22,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:22,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:22,809 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash 590808584, now seen corresponding path program 1 times [2020-10-25 22:17:22,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:17:22,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309306292] [2020-10-25 22:17:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:17:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:23,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309306292] [2020-10-25 22:17:23,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:17:23,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:17:23,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973369140] [2020-10-25 22:17:23,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:17:23,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:17:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:17:23,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:17:23,088 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-10-25 22:17:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:23,106 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-10-25 22:17:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:17:23,108 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-25 22:17:23,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:23,121 INFO L225 Difference]: With dead ends: 25 [2020-10-25 22:17:23,121 INFO L226 Difference]: Without dead ends: 12 [2020-10-25 22:17:23,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:17:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-25 22:17:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-25 22:17:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-25 22:17:23,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-25 22:17:23,175 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-10-25 22:17:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:23,176 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-25 22:17:23,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:17:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-25 22:17:23,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-25 22:17:23,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:23,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:23,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:17:23,180 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:23,183 INFO L82 PathProgramCache]: Analyzing trace with hash 218629621, now seen corresponding path program 1 times [2020-10-25 22:17:23,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:17:23,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169411066] [2020-10-25 22:17:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:17:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:23,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169411066] [2020-10-25 22:17:23,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:17:23,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:17:23,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963153901] [2020-10-25 22:17:23,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:17:23,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:17:23,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:17:23,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:17:23,351 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-10-25 22:17:23,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:23,391 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-25 22:17:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:17:23,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-25 22:17:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:23,393 INFO L225 Difference]: With dead ends: 22 [2020-10-25 22:17:23,393 INFO L226 Difference]: Without dead ends: 16 [2020-10-25 22:17:23,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:17:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-25 22:17:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-25 22:17:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-25 22:17:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-25 22:17:23,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-10-25 22:17:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:23,399 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-25 22:17:23,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:17:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-25 22:17:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 22:17:23,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:23,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:23,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:17:23,401 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:23,402 INFO L82 PathProgramCache]: Analyzing trace with hash 212204378, now seen corresponding path program 1 times [2020-10-25 22:17:23,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:17:23,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430996044] [2020-10-25 22:17:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:17:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:23,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430996044] [2020-10-25 22:17:23,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687335674] [2020-10-25 22:17:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:23,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-25 22:17:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:17:23,982 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-10-25 22:17:24,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:17:24,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:17:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:24,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:17:24,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-25 22:17:24,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140373991] [2020-10-25 22:17:24,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-25 22:17:24,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:17:24,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-25 22:17:24,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-25 22:17:24,100 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 12 states. [2020-10-25 22:17:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:24,333 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-25 22:17:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:17:24,334 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-10-25 22:17:24,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:24,337 INFO L225 Difference]: With dead ends: 32 [2020-10-25 22:17:24,338 INFO L226 Difference]: Without dead ends: 26 [2020-10-25 22:17:24,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-25 22:17:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-25 22:17:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-10-25 22:17:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-25 22:17:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-25 22:17:24,353 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2020-10-25 22:17:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:24,354 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-25 22:17:24,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-25 22:17:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-25 22:17:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 22:17:24,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:24,355 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:24,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-25 22:17:24,570 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2010166847, now seen corresponding path program 2 times [2020-10-25 22:17:24,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:17:24,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19733731] [2020-10-25 22:17:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:17:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:24,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19733731] [2020-10-25 22:17:24,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317596058] [2020-10-25 22:17:24,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:24,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:17:24,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:17:24,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-25 22:17:24,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:17:25,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:17:25,083 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-25 22:17:25,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:17:25,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:17:25,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:17:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:25,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:17:25,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-25 22:17:25,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679379989] [2020-10-25 22:17:25,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-25 22:17:25,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:17:25,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-25 22:17:25,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-25 22:17:25,121 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 16 states. [2020-10-25 22:17:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:25,571 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-25 22:17:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-25 22:17:25,572 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-10-25 22:17:25,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:25,573 INFO L225 Difference]: With dead ends: 46 [2020-10-25 22:17:25,573 INFO L226 Difference]: Without dead ends: 38 [2020-10-25 22:17:25,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-10-25 22:17:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-25 22:17:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-10-25 22:17:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-25 22:17:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-25 22:17:25,580 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2020-10-25 22:17:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:25,580 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-25 22:17:25,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-25 22:17:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-25 22:17:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 22:17:25,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:25,582 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:25,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:25,796 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1604742079, now seen corresponding path program 1 times [2020-10-25 22:17:25,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:17:25,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367677399] [2020-10-25 22:17:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:17:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:25,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367677399] [2020-10-25 22:17:25,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954820859] [2020-10-25 22:17:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:25,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:17:25,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:17:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:26,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:17:26,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-25 22:17:26,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064444404] [2020-10-25 22:17:26,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 22:17:26,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:17:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 22:17:26,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:17:26,026 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 8 states. [2020-10-25 22:17:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:26,063 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-25 22:17:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:17:26,064 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-25 22:17:26,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:26,065 INFO L225 Difference]: With dead ends: 39 [2020-10-25 22:17:26,065 INFO L226 Difference]: Without dead ends: 25 [2020-10-25 22:17:26,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:17:26,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-25 22:17:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-25 22:17:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-25 22:17:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-25 22:17:26,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-10-25 22:17:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:26,071 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-25 22:17:26,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 22:17:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-25 22:17:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 22:17:26,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:26,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:26,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:26,284 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1338878810, now seen corresponding path program 2 times [2020-10-25 22:17:26,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:17:26,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255138179] [2020-10-25 22:17:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:17:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:26,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255138179] [2020-10-25 22:17:26,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66642677] [2020-10-25 22:17:26,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:26,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:17:26,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:17:26,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:17:26,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:17:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:26,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:17:26,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-10-25 22:17:26,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211923579] [2020-10-25 22:17:26,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-25 22:17:26,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:17:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-25 22:17:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-10-25 22:17:26,552 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 12 states. [2020-10-25 22:17:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:26,611 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-25 22:17:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:17:26,612 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-25 22:17:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:26,613 INFO L225 Difference]: With dead ends: 35 [2020-10-25 22:17:26,613 INFO L226 Difference]: Without dead ends: 25 [2020-10-25 22:17:26,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-10-25 22:17:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-25 22:17:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-25 22:17:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-25 22:17:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-25 22:17:26,618 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-10-25 22:17:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:26,619 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-25 22:17:26,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-25 22:17:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-25 22:17:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 22:17:26,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:26,620 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:26,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:26,832 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:26,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2102297463, now seen corresponding path program 3 times [2020-10-25 22:17:26,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:17:26,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855708656] [2020-10-25 22:17:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:17:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-25 22:17:27,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855708656] [2020-10-25 22:17:27,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726342384] [2020-10-25 22:17:27,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:27,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-25 22:17:27,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:17:27,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-25 22:17:27,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:17:27,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:17:27,439 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-25 22:17:27,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:17:27,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:17:27,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:17:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:27,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:17:27,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2020-10-25 22:17:27,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983216121] [2020-10-25 22:17:27,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-25 22:17:27,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:17:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-25 22:17:27,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-25 22:17:27,475 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 21 states. [2020-10-25 22:17:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:28,327 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-10-25 22:17:28,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-25 22:17:28,328 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-25 22:17:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:28,329 INFO L225 Difference]: With dead ends: 48 [2020-10-25 22:17:28,329 INFO L226 Difference]: Without dead ends: 40 [2020-10-25 22:17:28,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-10-25 22:17:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-25 22:17:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-25 22:17:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 22:17:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-25 22:17:28,337 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2020-10-25 22:17:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:28,338 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-25 22:17:28,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-25 22:17:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-25 22:17:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 22:17:28,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:28,339 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:28,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-25 22:17:28,551 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:28,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1422239093, now seen corresponding path program 3 times [2020-10-25 22:17:28,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:17:28,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546091995] [2020-10-25 22:17:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:17:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:28,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546091995] [2020-10-25 22:17:28,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360930759] [2020-10-25 22:17:28,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:28,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-25 22:17:28,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:17:28,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 22:17:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:17:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:28,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:17:28,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-10-25 22:17:28,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282079769] [2020-10-25 22:17:28,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-25 22:17:28,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:17:28,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-25 22:17:28,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-10-25 22:17:28,873 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 16 states. [2020-10-25 22:17:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:28,966 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-25 22:17:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 22:17:28,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-25 22:17:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:28,968 INFO L225 Difference]: With dead ends: 41 [2020-10-25 22:17:28,968 INFO L226 Difference]: Without dead ends: 31 [2020-10-25 22:17:28,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-10-25 22:17:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-25 22:17:28,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-25 22:17:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 22:17:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-25 22:17:28,974 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-10-25 22:17:28,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:28,974 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-25 22:17:28,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-25 22:17:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-25 22:17:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-25 22:17:28,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:28,975 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:29,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:29,188 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash 894625264, now seen corresponding path program 4 times [2020-10-25 22:17:29,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:17:29,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719080047] [2020-10-25 22:17:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:17:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:29,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719080047] [2020-10-25 22:17:29,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573456292] [2020-10-25 22:17:29,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:29,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 22:17:29,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:17:29,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-25 22:17:29,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:17:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:29,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:17:29,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-10-25 22:17:29,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131486946] [2020-10-25 22:17:29,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-25 22:17:29,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:17:29,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-25 22:17:29,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-10-25 22:17:29,637 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 20 states. [2020-10-25 22:17:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:29,745 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-25 22:17:29,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-25 22:17:29,752 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-25 22:17:29,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:29,752 INFO L225 Difference]: With dead ends: 46 [2020-10-25 22:17:29,752 INFO L226 Difference]: Without dead ends: 36 [2020-10-25 22:17:29,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-10-25 22:17:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-25 22:17:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-25 22:17:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-25 22:17:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-25 22:17:29,758 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2020-10-25 22:17:29,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:29,759 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-25 22:17:29,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-25 22:17:29,759 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-25 22:17:29,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-25 22:17:29,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:29,760 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:29,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:17:29,972 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:29,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1614989611, now seen corresponding path program 5 times [2020-10-25 22:17:29,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:17:29,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059869843] [2020-10-25 22:17:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:17:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:17:30,016 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:17:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:17:30,052 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:17:30,087 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:17:30,088 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:17:30,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-25 22:17:30,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:17:30 BoogieIcfgContainer [2020-10-25 22:17:30,159 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:17:30,160 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:17:30,160 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:17:30,160 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:17:30,161 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:17:22" (3/4) ... [2020-10-25 22:17:30,164 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:17:30,259 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:17:30,262 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:17:30,264 INFO L168 Benchmark]: Toolchain (without parser) took 8469.50 ms. Allocated memory was 46.1 MB in the beginning and 100.7 MB in the end (delta: 54.5 MB). Free memory was 26.2 MB in the beginning and 41.2 MB in the end (delta: -15.0 MB). Peak memory consumption was 39.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:30,264 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 37.7 MB. Free memory is still 17.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:17:30,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.52 ms. Allocated memory is still 46.1 MB. Free memory was 25.6 MB in the beginning and 25.2 MB in the end (delta: 378.5 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:30,266 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.69 ms. Allocated memory is still 46.1 MB. Free memory was 25.2 MB in the beginning and 23.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:17:30,267 INFO L168 Benchmark]: Boogie Preprocessor took 52.88 ms. Allocated memory is still 46.1 MB. Free memory was 23.8 MB in the beginning and 22.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:30,269 INFO L168 Benchmark]: RCFGBuilder took 366.34 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 21.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:30,270 INFO L168 Benchmark]: TraceAbstraction took 7530.41 ms. Allocated memory was 46.1 MB in the beginning and 100.7 MB in the end (delta: 54.5 MB). Free memory was 21.0 MB in the beginning and 44.3 MB in the end (delta: -23.3 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:30,270 INFO L168 Benchmark]: Witness Printer took 102.65 ms. Allocated memory is still 100.7 MB. Free memory was 44.3 MB in the beginning and 41.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:30,273 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 37.7 MB. Free memory is still 17.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 353.52 ms. Allocated memory is still 46.1 MB. Free memory was 25.6 MB in the beginning and 25.2 MB in the end (delta: 378.5 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.69 ms. Allocated memory is still 46.1 MB. Free memory was 25.2 MB in the beginning and 23.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.88 ms. Allocated memory is still 46.1 MB. Free memory was 23.8 MB in the beginning and 22.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 366.34 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 21.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7530.41 ms. Allocated memory was 46.1 MB in the beginning and 100.7 MB in the end (delta: 54.5 MB). Free memory was 21.0 MB in the beginning and 44.3 MB in the end (delta: -23.3 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * Witness Printer took 102.65 ms. Allocated memory is still 100.7 MB. Free memory was 44.3 MB in the beginning and 41.2 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: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i