./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.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_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/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 39d1cf9c8579a9e3ab0612befbfddbea31e87fbe ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 09:00:35,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:00:35,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:00:35,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:00:35,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:00:35,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:00:35,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:00:35,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:00:35,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:00:35,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:00:35,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:00:35,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:00:35,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:00:35,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:00:35,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:00:35,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:00:35,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:00:35,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:00:35,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:00:35,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:00:35,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:00:35,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:00:35,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:00:35,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:00:35,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:00:35,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:00:35,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:00:35,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:00:35,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:00:35,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:00:35,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:00:35,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:00:35,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:00:35,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:00:35,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:00:35,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:00:35,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:00:35,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:00:35,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:00:35,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:00:35,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:00:35,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:00:35,268 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:00:35,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:00:35,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:00:35,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:00:35,269 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:00:35,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:00:35,270 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:00:35,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:00:35,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:00:35,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:00:35,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:00:35,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:00:35,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:00:35,271 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:00:35,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:00:35,271 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:00:35,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:00:35,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:00:35,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:00:35,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:00:35,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:00:35,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:00:35,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:00:35,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:00:35,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:00:35,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:00:35,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:00:35,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:00:35,273 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_a1a26282-a35e-423b-b0d8-15839d48f71c/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 -> 39d1cf9c8579a9e3ab0612befbfddbea31e87fbe [2019-10-22 09:00:35,307 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:00:35,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:00:35,327 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:00:35,329 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:00:35,329 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:00:35,330 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/../../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c [2019-10-22 09:00:35,374 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/data/2b2f7ffd3/c266b92cdadd45ecadc0cae2acf1379b/FLAGe432f49d0 [2019-10-22 09:00:35,761 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:00:35,761 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/sv-benchmarks/c/loop-acceleration/underapprox_1-1.c [2019-10-22 09:00:35,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/data/2b2f7ffd3/c266b92cdadd45ecadc0cae2acf1379b/FLAGe432f49d0 [2019-10-22 09:00:36,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/data/2b2f7ffd3/c266b92cdadd45ecadc0cae2acf1379b [2019-10-22 09:00:36,152 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:00:36,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:00:36,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:36,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:00:36,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:00:36,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a2d28f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36, skipping insertion in model container [2019-10-22 09:00:36,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,172 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:00:36,185 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:00:36,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:36,309 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:00:36,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:36,394 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:00:36,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36 WrapperNode [2019-10-22 09:00:36,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:36,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:36,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:00:36,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:00:36,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:36,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:00:36,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:00:36,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:00:36,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (1/1) ... [2019-10-22 09:00:36,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:00:36,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:00:36,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:00:36,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:00:36,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/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 09:00:36,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:00:36,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:00:36,599 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:00:36,599 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 09:00:36,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:36 BoogieIcfgContainer [2019-10-22 09:00:36,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:00:36,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:00:36,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:00:36,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:00:36,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:00:36" (1/3) ... [2019-10-22 09:00:36,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537f9db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:36, skipping insertion in model container [2019-10-22 09:00:36,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:36" (2/3) ... [2019-10-22 09:00:36,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537f9db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:36, skipping insertion in model container [2019-10-22 09:00:36,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:36" (3/3) ... [2019-10-22 09:00:36,612 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2019-10-22 09:00:36,620 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:00:36,626 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:00:36,633 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:00:36,654 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:00:36,654 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:00:36,654 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:00:36,654 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:00:36,654 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:00:36,655 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:00:36,655 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:00:36,655 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:00:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-10-22 09:00:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 09:00:36,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:36,671 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 09:00:36,673 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:36,678 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-10-22 09:00:36,686 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:36,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854177757] [2019-10-22 09:00:36,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:36,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:36,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,829 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 09:00:36,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854177757] [2019-10-22 09:00:36,830 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:36,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:00:36,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124022871] [2019-10-22 09:00:36,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 09:00:36,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:00:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:36,850 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-10-22 09:00:36,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:36,873 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-10-22 09:00:36,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:00:36,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-10-22 09:00:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:36,883 INFO L225 Difference]: With dead ends: 17 [2019-10-22 09:00:36,883 INFO L226 Difference]: Without dead ends: 7 [2019-10-22 09:00:36,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-10-22 09:00:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-10-22 09:00:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-10-22 09:00:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-10-22 09:00:36,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-10-22 09:00:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:36,916 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-10-22 09:00:36,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 09:00:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-10-22 09:00:36,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 09:00:36,916 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:36,916 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 09:00:36,917 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:36,917 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-10-22 09:00:36,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:36,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101376830] [2019-10-22 09:00:36,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:36,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:36,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:36,974 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 09:00:36,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101376830] [2019-10-22 09:00:36,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505148151] [2019-10-22 09:00:36,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/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 09:00:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 09:00:37,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:37,046 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 09:00:37,046 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:37,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-10-22 09:00:37,046 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865927647] [2019-10-22 09:00:37,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:00:37,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:37,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:00:37,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:00:37,049 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-10-22 09:00:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:37,067 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-10-22 09:00:37,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:00:37,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-10-22 09:00:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:37,068 INFO L225 Difference]: With dead ends: 12 [2019-10-22 09:00:37,068 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 09:00:37,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:00:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 09:00:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 09:00:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 09:00:37,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-10-22 09:00:37,071 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-10-22 09:00:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:37,071 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-10-22 09:00:37,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:00:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-10-22 09:00:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 09:00:37,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:37,072 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-10-22 09:00:37,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:37,273 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-10-22 09:00:37,274 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:37,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313299502] [2019-10-22 09:00:37,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:37,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:37,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,351 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 09:00:37,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313299502] [2019-10-22 09:00:37,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693084373] [2019-10-22 09:00:37,352 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/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 09:00:37,385 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:37,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:37,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:37,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:37,409 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 09:00:37,409 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:37,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-22 09:00:37,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570186645] [2019-10-22 09:00:37,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:00:37,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:37,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:00:37,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:37,411 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-10-22 09:00:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:37,436 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-10-22 09:00:37,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:00:37,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-10-22 09:00:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:37,439 INFO L225 Difference]: With dead ends: 13 [2019-10-22 09:00:37,439 INFO L226 Difference]: Without dead ends: 9 [2019-10-22 09:00:37,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-10-22 09:00:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-10-22 09:00:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 09:00:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-10-22 09:00:37,441 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-10-22 09:00:37,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:37,442 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-10-22 09:00:37,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:00:37,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-10-22 09:00:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:00:37,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:37,442 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-10-22 09:00:37,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:37,645 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-10-22 09:00:37,646 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:37,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913465397] [2019-10-22 09:00:37,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:37,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:37,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:37,746 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 09:00:37,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913465397] [2019-10-22 09:00:37,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30462021] [2019-10-22 09:00:37,747 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/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 09:00:37,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 09:00:37,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:37,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:00:37,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:37,793 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 09:00:37,794 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:37,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-22 09:00:37,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146426807] [2019-10-22 09:00:37,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:00:37,795 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:37,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:00:37,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:00:37,795 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2019-10-22 09:00:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:37,821 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-10-22 09:00:37,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:00:37,822 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-10-22 09:00:37,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:37,823 INFO L225 Difference]: With dead ends: 14 [2019-10-22 09:00:37,823 INFO L226 Difference]: Without dead ends: 10 [2019-10-22 09:00:37,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:00:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-10-22 09:00:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-10-22 09:00:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-10-22 09:00:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-10-22 09:00:37,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2019-10-22 09:00:37,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:37,826 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-10-22 09:00:37,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:00:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-10-22 09:00:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 09:00:37,827 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:37,827 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2019-10-22 09:00:38,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:38,028 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:38,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:38,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1174852536, now seen corresponding path program 4 times [2019-10-22 09:00:38,029 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:38,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794816356] [2019-10-22 09:00:38,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:38,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:38,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,120 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 09:00:38,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794816356] [2019-10-22 09:00:38,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202198210] [2019-10-22 09:00:38,120 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/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 09:00:38,141 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:00:38,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:38,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 09:00:38,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:38,170 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 09:00:38,171 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:38,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-22 09:00:38,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241315554] [2019-10-22 09:00:38,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:00:38,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:38,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:00:38,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:00:38,172 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2019-10-22 09:00:38,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:38,206 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-10-22 09:00:38,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:00:38,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-10-22 09:00:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:38,207 INFO L225 Difference]: With dead ends: 15 [2019-10-22 09:00:38,207 INFO L226 Difference]: Without dead ends: 11 [2019-10-22 09:00:38,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:00:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-10-22 09:00:38,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-10-22 09:00:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-10-22 09:00:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-10-22 09:00:38,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-10-22 09:00:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:38,210 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-10-22 09:00:38,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:00:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-10-22 09:00:38,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:00:38,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:38,211 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2019-10-22 09:00:38,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:38,412 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:38,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2059024878, now seen corresponding path program 5 times [2019-10-22 09:00:38,412 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:38,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646075329] [2019-10-22 09:00:38,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:38,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:38,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,500 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 09:00:38,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646075329] [2019-10-22 09:00:38,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119108864] [2019-10-22 09:00:38,500 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/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 09:00:38,528 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-22 09:00:38,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:38,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 09:00:38,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:38,555 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 09:00:38,555 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:38,556 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-22 09:00:38,556 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714868226] [2019-10-22 09:00:38,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:00:38,557 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:38,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:00:38,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:00:38,557 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2019-10-22 09:00:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:38,610 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-10-22 09:00:38,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:00:38,611 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2019-10-22 09:00:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:38,612 INFO L225 Difference]: With dead ends: 16 [2019-10-22 09:00:38,612 INFO L226 Difference]: Without dead ends: 12 [2019-10-22 09:00:38,612 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:00:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-22 09:00:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-22 09:00:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 09:00:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-22 09:00:38,615 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-22 09:00:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:38,615 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-22 09:00:38,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:00:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-22 09:00:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 09:00:38,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:38,615 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2019-10-22 09:00:38,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:38,817 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:38,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 6 times [2019-10-22 09:00:38,818 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:38,818 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575798886] [2019-10-22 09:00:38,818 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:38,818 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:38,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:38,865 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:38,866 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:00:38,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:00:38 BoogieIcfgContainer [2019-10-22 09:00:38,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:00:38,886 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:00:38,886 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:00:38,886 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:00:38,886 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:36" (3/4) ... [2019-10-22 09:00:38,890 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 09:00:38,939 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a1a26282-a35e-423b-b0d8-15839d48f71c/bin/uautomizer/witness.graphml [2019-10-22 09:00:38,939 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:00:38,943 INFO L168 Benchmark]: Toolchain (without parser) took 2787.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 944.5 MB in the beginning and 966.6 MB in the end (delta: -22.1 MB). Peak memory consumption was 105.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:38,944 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:00:38,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -178.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:38,944 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:00:38,945 INFO L168 Benchmark]: Boogie Preprocessor took 13.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:00:38,945 INFO L168 Benchmark]: RCFGBuilder took 168.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:38,950 INFO L168 Benchmark]: TraceAbstraction took 2283.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 972.0 MB in the end (delta: 131.7 MB). Peak memory consumption was 131.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:38,950 INFO L168 Benchmark]: Witness Printer took 53.35 ms. Allocated memory is still 1.2 GB. Free memory was 972.0 MB in the beginning and 966.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:38,952 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 240.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -178.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 168.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2283.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 972.0 MB in the end (delta: 131.7 MB). Peak memory consumption was 131.7 MB. Max. memory is 11.5 GB. * Witness Printer took 53.35 ms. Allocated memory is still 1.2 GB. Free memory was 972.0 MB in the beginning and 966.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 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: 2.2s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 69 SDs, 0 SdLazy, 135 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s 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, 0.5s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 2490 SizeOfPredicates, 5 NumberOfNonLiveVariables, 145 ConjunctsInSsa, 45 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...