./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 452a4ddc5d154328a041fd76cdcbb5b63a51957d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-cad4683 [2019-10-22 09:01:15,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:15,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:15,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:15,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:15,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:15,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:15,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:15,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:15,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:15,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:15,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:15,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:15,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:15,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:15,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:15,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:15,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:15,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:15,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:15,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:15,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:15,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:15,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:15,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:15,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:15,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:15,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:15,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:15,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:15,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:15,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:15,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:15,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:15,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:15,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:15,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:15,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:15,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:15,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:15,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:15,288 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:01:15,299 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:15,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:15,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:15,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:15,301 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:15,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:15,301 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:01:15,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:01:15,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:01:15,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:15,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:01:15,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:15,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:01:15,303 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:01:15,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:15,303 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:15,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:01:15,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:15,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:15,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:15,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:15,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:15,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:15,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:15,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:01:15,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:01:15,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:01:15,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:01:15,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer 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(__VERIFIER_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 -> 452a4ddc5d154328a041fd76cdcbb5b63a51957d [2019-10-22 09:01:15,335 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:15,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:15,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:15,352 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:15,352 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:15,353 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2019-10-22 09:01:15,407 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/data/bf29d435e/c34fbe25d4df462faaeef9523b33d1fd/FLAG939d68dfe [2019-10-22 09:01:15,776 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:15,776 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2019-10-22 09:01:15,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/data/bf29d435e/c34fbe25d4df462faaeef9523b33d1fd/FLAG939d68dfe [2019-10-22 09:01:16,189 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/data/bf29d435e/c34fbe25d4df462faaeef9523b33d1fd [2019-10-22 09:01:16,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:16,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:16,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:16,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:16,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:16,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b42203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16, skipping insertion in model container [2019-10-22 09:01:16,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,207 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:16,220 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:16,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:16,336 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:16,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:16,420 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:16,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16 WrapperNode [2019-10-22 09:01:16,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:16,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:16,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:16,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:16,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:16,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:16,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:16,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:16,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (1/1) ... [2019-10-22 09:01:16,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:16,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:16,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:16,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:16,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/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 [2019-10-22 09:01:16,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:16,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:16,670 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:16,670 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 09:01:16,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:16 BoogieIcfgContainer [2019-10-22 09:01:16,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:16,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:16,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:16,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:16,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:16" (1/3) ... [2019-10-22 09:01:16,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69162ec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:16, skipping insertion in model container [2019-10-22 09:01:16,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:16" (2/3) ... [2019-10-22 09:01:16,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69162ec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:16, skipping insertion in model container [2019-10-22 09:01:16,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:16" (3/3) ... [2019-10-22 09:01:16,682 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2019-10-22 09:01:16,689 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:16,693 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:01:16,700 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:01:16,717 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:16,717 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:01:16,717 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:16,717 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:16,717 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:16,717 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:16,717 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:16,717 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-10-22 09:01:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 09:01:16,731 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:16,732 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 09:01:16,733 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:16,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:16,738 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-10-22 09:01:16,745 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:16,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641780011] [2019-10-22 09:01:16,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:16,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:16,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:16,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641780011] [2019-10-22 09:01:16,980 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:16,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:01:16,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318334359] [2019-10-22 09:01:16,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:16,985 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:16,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:16,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:16,999 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2019-10-22 09:01:17,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:17,024 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-10-22 09:01:17,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:17,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 09:01:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:17,033 INFO L225 Difference]: With dead ends: 17 [2019-10-22 09:01:17,033 INFO L226 Difference]: Without dead ends: 7 [2019-10-22 09:01:17,036 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-10-22 09:01:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-10-22 09:01:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-10-22 09:01:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-10-22 09:01:17,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-10-22 09:01:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:17,061 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-10-22 09:01:17,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-10-22 09:01:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 09:01:17,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:17,062 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 09:01:17,062 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:17,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:17,063 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-10-22 09:01:17,063 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:17,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121346151] [2019-10-22 09:01:17,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:17,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:17,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:17,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121346151] [2019-10-22 09:01:17,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517204930] [2019-10-22 09:01:17,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/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 [2019-10-22 09:01:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:17,164 WARN L254 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 09:01:17,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:17,199 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:17,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2019-10-22 09:01:17,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993030972] [2019-10-22 09:01:17,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:17,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:17,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:17,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:17,202 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-10-22 09:01:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:17,224 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-10-22 09:01:17,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:17,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-10-22 09:01:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:17,225 INFO L225 Difference]: With dead ends: 12 [2019-10-22 09:01:17,225 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 09:01:17,226 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 09:01:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 09:01:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 09:01:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-10-22 09:01:17,228 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-10-22 09:01:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:17,228 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-10-22 09:01:17,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-10-22 09:01:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 09:01:17,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:17,229 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-10-22 09:01:17,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:17,430 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:17,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-10-22 09:01:17,431 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:17,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472897364] [2019-10-22 09:01:17,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:17,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:17,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:17,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472897364] [2019-10-22 09:01:17,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647109441] [2019-10-22 09:01:17,518 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/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 [2019-10-22 09:01:17,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:17,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:17,549 WARN L254 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 09:01:17,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:17,567 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:17,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-22 09:01:17,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169462326] [2019-10-22 09:01:17,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:17,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:17,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:17,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:17,569 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2019-10-22 09:01:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:17,675 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-10-22 09:01:17,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:17,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-10-22 09:01:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:17,676 INFO L225 Difference]: With dead ends: 13 [2019-10-22 09:01:17,676 INFO L226 Difference]: Without dead ends: 9 [2019-10-22 09:01:17,677 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-10-22 09:01:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-10-22 09:01:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 09:01:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-10-22 09:01:17,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-10-22 09:01:17,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:17,679 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-10-22 09:01:17,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-10-22 09:01:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:01:17,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:17,680 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-10-22 09:01:17,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:17,881 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:17,881 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-10-22 09:01:17,881 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:17,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943526515] [2019-10-22 09:01:17,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:17,882 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:17,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:17,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943526515] [2019-10-22 09:01:17,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817469992] [2019-10-22 09:01:17,977 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/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 [2019-10-22 09:01:18,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 09:01:18,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:18,008 WARN L254 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 09:01:18,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:18,042 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:18,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-22 09:01:18,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145465979] [2019-10-22 09:01:18,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:01:18,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:01:18,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:18,043 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2019-10-22 09:01:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:18,094 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-10-22 09:01:18,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:18,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-10-22 09:01:18,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:18,095 INFO L225 Difference]: With dead ends: 14 [2019-10-22 09:01:18,095 INFO L226 Difference]: Without dead ends: 10 [2019-10-22 09:01:18,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:18,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-10-22 09:01:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-10-22 09:01:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-10-22 09:01:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-10-22 09:01:18,098 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2019-10-22 09:01:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:18,101 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-10-22 09:01:18,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:01:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-10-22 09:01:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 09:01:18,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:18,102 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2019-10-22 09:01:18,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:18,304 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:18,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:18,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1174852536, now seen corresponding path program 4 times [2019-10-22 09:01:18,305 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:18,305 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381299443] [2019-10-22 09:01:18,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:18,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:18,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:18,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381299443] [2019-10-22 09:01:18,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531581846] [2019-10-22 09:01:18,398 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/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 [2019-10-22 09:01:18,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:18,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:18,419 WARN L254 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-22 09:01:18,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:18,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:18,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-22 09:01:18,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818796624] [2019-10-22 09:01:18,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:01:18,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:18,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:01:18,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:18,439 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2019-10-22 09:01:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:18,481 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-10-22 09:01:18,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:18,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2019-10-22 09:01:18,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:18,482 INFO L225 Difference]: With dead ends: 15 [2019-10-22 09:01:18,482 INFO L226 Difference]: Without dead ends: 11 [2019-10-22 09:01:18,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-10-22 09:01:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-10-22 09:01:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-10-22 09:01:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-10-22 09:01:18,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-10-22 09:01:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:18,485 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-10-22 09:01:18,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:01:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-10-22 09:01:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:01:18,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:18,486 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2019-10-22 09:01:18,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:18,687 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:18,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2059024878, now seen corresponding path program 5 times [2019-10-22 09:01:18,687 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:18,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541674663] [2019-10-22 09:01:18,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:18,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:18,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:18,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541674663] [2019-10-22 09:01:18,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861728041] [2019-10-22 09:01:18,857 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/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 [2019-10-22 09:01:18,889 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-22 09:01:18,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:18,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-22 09:01:18,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:18,923 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:18,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-22 09:01:18,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577251230] [2019-10-22 09:01:18,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:01:18,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:01:18,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:18,925 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2019-10-22 09:01:18,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:18,987 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-10-22 09:01:18,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:01:18,987 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-10-22 09:01:18,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:18,988 INFO L225 Difference]: With dead ends: 16 [2019-10-22 09:01:18,988 INFO L226 Difference]: Without dead ends: 12 [2019-10-22 09:01:18,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-22 09:01:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-22 09:01:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 09:01:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-22 09:01:18,990 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-22 09:01:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:18,990 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-22 09:01:18,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:01:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-22 09:01:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 09:01:18,990 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:18,990 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2019-10-22 09:01:19,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:19,191 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:19,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:19,191 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 6 times [2019-10-22 09:01:19,192 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:19,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059759237] [2019-10-22 09:01:19,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:19,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:19,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:19,246 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:19,246 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:01:19,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:19 BoogieIcfgContainer [2019-10-22 09:01:19,264 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:19,264 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:19,264 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:19,265 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:19,265 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:16" (3/4) ... [2019-10-22 09:01:19,268 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 09:01:19,306 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9320b99d-728a-4f23-93f9-0150dcaa6b51/bin/uautomizer/witness.graphml [2019-10-22 09:01:19,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:19,309 INFO L168 Benchmark]: Toolchain (without parser) took 3115.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 940.7 MB in the beginning and 935.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 113.5 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:19,309 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:19,310 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.95 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -165.2 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:19,310 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.16 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:19,311 INFO L168 Benchmark]: Boogie Preprocessor took 16.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:19,311 INFO L168 Benchmark]: RCFGBuilder took 211.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:19,311 INFO L168 Benchmark]: TraceAbstraction took 2591.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 937.0 MB in the end (delta: 149.2 MB). Peak memory consumption was 149.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:19,312 INFO L168 Benchmark]: Witness Printer took 42.45 ms. Allocated memory is still 1.1 GB. Free memory was 937.0 MB in the beginning and 935.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:19,314 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 226.95 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -165.2 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.16 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 211.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2591.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 937.0 MB in the end (delta: 149.2 MB). Peak memory consumption was 149.2 MB. Max. memory is 11.5 GB. * Witness Printer took 42.45 ms. Allocated memory is still 1.1 GB. Free memory was 937.0 MB in the beginning and 935.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.5s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 2 SDslu, 55 SDs, 0 SdLazy, 175 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 16 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 2607 SizeOfPredicates, 0 NumberOfNonLiveVariables, 145 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...