./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/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/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 [2019-11-15 21:50:44,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 21:50:44,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 21:50:44,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 21:50:44,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 21:50:44,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 21:50:44,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 21:50:44,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 21:50:44,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 21:50:44,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 21:50:44,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 21:50:44,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 21:50:44,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 21:50:44,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 21:50:44,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 21:50:44,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 21:50:44,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 21:50:44,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 21:50:44,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 21:50:44,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 21:50:44,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 21:50:44,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 21:50:44,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 21:50:44,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 21:50:44,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 21:50:44,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 21:50:44,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 21:50:44,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 21:50:44,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 21:50:44,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 21:50:44,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 21:50:44,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 21:50:44,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 21:50:44,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 21:50:44,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 21:50:44,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 21:50:44,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 21:50:44,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 21:50:44,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 21:50:44,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 21:50:44,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 21:50:44,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 21:50:45,004 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 21:50:45,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 21:50:45,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 21:50:45,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 21:50:45,006 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 21:50:45,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 21:50:45,006 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 21:50:45,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 21:50:45,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 21:50:45,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 21:50:45,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 21:50:45,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 21:50:45,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 21:50:45,008 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 21:50:45,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 21:50:45,008 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 21:50:45,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 21:50:45,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 21:50:45,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 21:50:45,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 21:50:45,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 21:50:45,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:50:45,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 21:50:45,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 21:50:45,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 21:50:45,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 21:50:45,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 21:50:45,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 21:50:45,011 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/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/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 [2019-11-15 21:50:45,036 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 21:50:45,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 21:50:45,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 21:50:45,049 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 21:50:45,050 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 21:50:45,050 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2019-11-15 21:50:45,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/data/1d29fee8d/89d2da22aa1f4843a3c88299a5c945ca/FLAG58930c995 [2019-11-15 21:50:45,432 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 21:50:45,433 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2019-11-15 21:50:45,438 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/data/1d29fee8d/89d2da22aa1f4843a3c88299a5c945ca/FLAG58930c995 [2019-11-15 21:50:45,828 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/data/1d29fee8d/89d2da22aa1f4843a3c88299a5c945ca [2019-11-15 21:50:45,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 21:50:45,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 21:50:45,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 21:50:45,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 21:50:45,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 21:50:45,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:50:45" (1/1) ... [2019-11-15 21:50:45,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@645ba905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:45, skipping insertion in model container [2019-11-15 21:50:45,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:50:45" (1/1) ... [2019-11-15 21:50:45,847 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 21:50:45,861 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 21:50:46,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:50:46,041 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 21:50:46,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:50:46,141 INFO L192 MainTranslator]: Completed translation [2019-11-15 21:50:46,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46 WrapperNode [2019-11-15 21:50:46,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 21:50:46,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 21:50:46,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 21:50:46,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 21:50:46,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (1/1) ... [2019-11-15 21:50:46,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (1/1) ... [2019-11-15 21:50:46,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 21:50:46,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 21:50:46,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 21:50:46,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 21:50:46,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (1/1) ... [2019-11-15 21:50:46,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (1/1) ... [2019-11-15 21:50:46,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (1/1) ... [2019-11-15 21:50:46,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (1/1) ... [2019-11-15 21:50:46,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (1/1) ... [2019-11-15 21:50:46,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (1/1) ... [2019-11-15 21:50:46,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (1/1) ... [2019-11-15 21:50:46,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 21:50:46,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 21:50:46,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 21:50:46,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 21:50:46,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/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 [2019-11-15 21:50:46,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 21:50:46,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 21:50:46,413 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 21:50:46,413 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-15 21:50:46,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:50:46 BoogieIcfgContainer [2019-11-15 21:50:46,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 21:50:46,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 21:50:46,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 21:50:46,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 21:50:46,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 09:50:45" (1/3) ... [2019-11-15 21:50:46,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726e69d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:50:46, skipping insertion in model container [2019-11-15 21:50:46,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:50:46" (2/3) ... [2019-11-15 21:50:46,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726e69d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:50:46, skipping insertion in model container [2019-11-15 21:50:46,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:50:46" (3/3) ... [2019-11-15 21:50:46,431 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2019-11-15 21:50:46,440 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 21:50:46,451 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 21:50:46,468 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 21:50:46,496 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 21:50:46,496 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 21:50:46,497 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 21:50:46,497 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 21:50:46,498 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 21:50:46,498 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 21:50:46,499 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 21:50:46,500 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 21:50:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-15 21:50:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-15 21:50:46,518 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:50:46,519 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-15 21:50:46,520 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:50:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:50:46,526 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-11-15 21:50:46,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:50:46,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771095238] [2019-11-15 21:50:46,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:46,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:46,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:50:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:50:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:46,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771095238] [2019-11-15 21:50:46,738 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:50:46,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 21:50:46,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800388469] [2019-11-15 21:50:46,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 21:50:46,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:50:46,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 21:50:46,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:50:46,759 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2019-11-15 21:50:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:50:46,791 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-11-15 21:50:46,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 21:50:46,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-15 21:50:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:50:46,801 INFO L225 Difference]: With dead ends: 17 [2019-11-15 21:50:46,801 INFO L226 Difference]: Without dead ends: 7 [2019-11-15 21:50:46,804 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 [2019-11-15 21:50:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-15 21:50:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-15 21:50:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-15 21:50:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-15 21:50:46,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-15 21:50:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:50:46,837 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-15 21:50:46,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 21:50:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-15 21:50:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-15 21:50:46,838 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:50:46,838 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-15 21:50:46,838 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:50:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:50:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-11-15 21:50:46,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:50:46,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497382368] [2019-11-15 21:50:46,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:46,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:46,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:50:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:50:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:46,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497382368] [2019-11-15 21:50:46,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745868440] [2019-11-15 21:50:46,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/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 [2019-11-15 21:50:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:50:46,977 WARN L254 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 21:50:46,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:50:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:47,006 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:50:47,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2019-11-15 21:50:47,006 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026541063] [2019-11-15 21:50:47,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 21:50:47,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:50:47,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 21:50:47,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 21:50:47,008 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-11-15 21:50:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:50:47,057 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-15 21:50:47,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 21:50:47,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-11-15 21:50:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:50:47,058 INFO L225 Difference]: With dead ends: 12 [2019-11-15 21:50:47,059 INFO L226 Difference]: Without dead ends: 8 [2019-11-15 21:50:47,059 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 [2019-11-15 21:50:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-15 21:50:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-15 21:50:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-15 21:50:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-15 21:50:47,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-15 21:50:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:50:47,062 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-15 21:50:47,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 21:50:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-15 21:50:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-15 21:50:47,063 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:50:47,063 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-15 21:50:47,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:50:47,264 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:50:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:50:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-11-15 21:50:47,265 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:50:47,265 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667135363] [2019-11-15 21:50:47,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:47,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:47,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:50:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:50:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:47,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667135363] [2019-11-15 21:50:47,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333509220] [2019-11-15 21:50:47,387 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/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 [2019-11-15 21:50:47,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 21:50:47,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:50:47,420 WARN L254 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-15 21:50:47,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:50:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:47,464 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:50:47,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-15 21:50:47,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079394298] [2019-11-15 21:50:47,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 21:50:47,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:50:47,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 21:50:47,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-15 21:50:47,465 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2019-11-15 21:50:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:50:47,498 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-15 21:50:47,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 21:50:47,499 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-11-15 21:50:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:50:47,499 INFO L225 Difference]: With dead ends: 13 [2019-11-15 21:50:47,499 INFO L226 Difference]: Without dead ends: 9 [2019-11-15 21:50:47,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-15 21:50:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-15 21:50:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-15 21:50:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-15 21:50:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-15 21:50:47,502 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-11-15 21:50:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:50:47,503 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-15 21:50:47,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 21:50:47,503 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-15 21:50:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-15 21:50:47,503 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:50:47,504 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-11-15 21:50:47,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:50:47,704 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:50:47,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:50:47,705 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-11-15 21:50:47,705 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:50:47,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779856373] [2019-11-15 21:50:47,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:47,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:47,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:50:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:50:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:47,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779856373] [2019-11-15 21:50:47,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877087440] [2019-11-15 21:50:47,833 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/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 [2019-11-15 21:50:47,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-15 21:50:47,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:50:47,872 WARN L254 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-15 21:50:47,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:50:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:47,906 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:50:47,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-15 21:50:47,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278591850] [2019-11-15 21:50:47,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 21:50:47,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:50:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 21:50:47,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-15 21:50:47,908 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2019-11-15 21:50:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:50:47,972 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-15 21:50:47,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 21:50:47,973 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-11-15 21:50:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:50:47,974 INFO L225 Difference]: With dead ends: 14 [2019-11-15 21:50:47,974 INFO L226 Difference]: Without dead ends: 10 [2019-11-15 21:50:47,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-15 21:50:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-15 21:50:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-15 21:50:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-15 21:50:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-15 21:50:47,978 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2019-11-15 21:50:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:50:47,978 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-15 21:50:47,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 21:50:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-15 21:50:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 21:50:47,979 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:50:47,979 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2019-11-15 21:50:48,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:50:48,180 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:50:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:50:48,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1174852536, now seen corresponding path program 4 times [2019-11-15 21:50:48,180 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:50:48,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083696660] [2019-11-15 21:50:48,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:48,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:48,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:50:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:50:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:48,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083696660] [2019-11-15 21:50:48,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853663312] [2019-11-15 21:50:48,309 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/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 [2019-11-15 21:50:48,356 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 21:50:48,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:50:48,358 WARN L254 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-15 21:50:48,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:50:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:48,390 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:50:48,390 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-15 21:50:48,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436878540] [2019-11-15 21:50:48,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 21:50:48,391 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:50:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 21:50:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-15 21:50:48,392 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2019-11-15 21:50:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:50:48,459 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-15 21:50:48,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 21:50:48,461 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2019-11-15 21:50:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:50:48,461 INFO L225 Difference]: With dead ends: 15 [2019-11-15 21:50:48,461 INFO L226 Difference]: Without dead ends: 11 [2019-11-15 21:50:48,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-15 21:50:48,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-15 21:50:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-15 21:50:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-15 21:50:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-15 21:50:48,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-11-15 21:50:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:50:48,465 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-15 21:50:48,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 21:50:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-15 21:50:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 21:50:48,466 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:50:48,466 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2019-11-15 21:50:48,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:50:48,673 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:50:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:50:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2059024878, now seen corresponding path program 5 times [2019-11-15 21:50:48,673 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:50:48,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465420151] [2019-11-15 21:50:48,674 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:48,674 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:48,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:50:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:50:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:48,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465420151] [2019-11-15 21:50:48,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547321001] [2019-11-15 21:50:48,834 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/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 [2019-11-15 21:50:48,871 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-15 21:50:48,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:50:48,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-15 21:50:48,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:50:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:50:48,914 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:50:48,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-15 21:50:48,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751578007] [2019-11-15 21:50:48,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 21:50:48,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:50:48,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 21:50:48,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-15 21:50:48,915 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2019-11-15 21:50:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:50:48,967 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-15 21:50:48,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 21:50:48,968 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-11-15 21:50:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:50:48,968 INFO L225 Difference]: With dead ends: 16 [2019-11-15 21:50:48,969 INFO L226 Difference]: Without dead ends: 12 [2019-11-15 21:50:48,969 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 [2019-11-15 21:50:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-15 21:50:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-15 21:50:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-15 21:50:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-15 21:50:48,972 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-15 21:50:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:50:48,972 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-15 21:50:48,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 21:50:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-15 21:50:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 21:50:48,973 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:50:48,973 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2019-11-15 21:50:49,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:50:49,174 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:50:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:50:49,175 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 6 times [2019-11-15 21:50:49,175 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:50:49,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855406312] [2019-11-15 21:50:49,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:49,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:50:49,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:50:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:50:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:50:49,219 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:50:49,219 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 21:50:49,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 09:50:49 BoogieIcfgContainer [2019-11-15 21:50:49,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 21:50:49,237 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 21:50:49,237 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 21:50:49,238 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 21:50:49,238 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:50:46" (3/4) ... [2019-11-15 21:50:49,240 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 21:50:49,287 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_47ff7627-2aba-40e3-9d59-1464eb932c6d/bin/uautomizer/witness.graphml [2019-11-15 21:50:49,287 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 21:50:49,289 INFO L168 Benchmark]: Toolchain (without parser) took 3456.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 944.7 MB in the beginning and 958.8 MB in the end (delta: -14.1 MB). Peak memory consumption was 116.9 MB. Max. memory is 11.5 GB. [2019-11-15 21:50:49,290 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:50:49,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -179.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 21:50:49,291 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.67 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. [2019-11-15 21:50:49,291 INFO L168 Benchmark]: Boogie Preprocessor took 15.89 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. [2019-11-15 21:50:49,292 INFO L168 Benchmark]: RCFGBuilder took 224.37 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-15 21:50:49,292 INFO L168 Benchmark]: TraceAbstraction took 2821.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 958.8 MB in the end (delta: 148.7 MB). Peak memory consumption was 148.7 MB. Max. memory is 11.5 GB. [2019-11-15 21:50:49,292 INFO L168 Benchmark]: Witness Printer took 50.34 ms. Allocated memory is still 1.2 GB. Free memory is still 958.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:50:49,295 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 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 309.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -179.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.67 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 15.89 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 224.37 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2821.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 958.8 MB in the end (delta: 148.7 MB). Peak memory consumption was 148.7 MB. Max. memory is 11.5 GB. * Witness Printer took 50.34 ms. Allocated memory is still 1.2 GB. Free memory is still 958.8 MB. There was no memory consumed. 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: 2.7s, 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, 0.8s 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...