./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.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_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/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 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 ................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:30:32,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:30:32,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:30:32,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:30:32,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:30:32,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:30:32,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:30:32,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:30:32,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:30:32,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:30:32,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:30:32,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:30:32,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:30:32,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:30:32,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:30:32,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:30:32,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:30:32,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:30:32,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:30:32,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:30:32,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:30:32,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:30:32,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:30:32,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:30:32,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:30:32,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:30:32,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:30:32,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:30:32,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:30:32,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:30:32,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:30:32,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:30:32,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:30:32,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:30:32,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:30:32,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:30:32,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:30:32,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:30:32,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:30:32,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:30:32,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:30:32,130 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:30:32,154 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:30:32,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:30:32,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:30:32,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:30:32,156 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:30:32,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:30:32,157 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:30:32,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:30:32,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:30:32,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:30:32,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:30:32,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:30:32,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:30:32,159 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:30:32,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:30:32,160 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:30:32,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:30:32,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:30:32,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:30:32,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:30:32,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:30:32,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:30:32,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:30:32,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:30:32,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:30:32,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:30:32,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:30:32,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:30:32,164 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_d453f32e-fc86-4283-8d29-48ec74951350/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 -> 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 [2019-11-16 00:30:32,221 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:30:32,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:30:32,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:30:32,250 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:30:32,250 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:30:32,251 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2019-11-16 00:30:32,332 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/data/b331722bc/7df3650a69294422a6a8c1ed31c28561/FLAGa97db3247 [2019-11-16 00:30:32,780 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:30:32,783 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2019-11-16 00:30:32,789 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/data/b331722bc/7df3650a69294422a6a8c1ed31c28561/FLAGa97db3247 [2019-11-16 00:30:33,145 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/data/b331722bc/7df3650a69294422a6a8c1ed31c28561 [2019-11-16 00:30:33,148 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:30:33,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:30:33,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:30:33,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:30:33,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:30:33,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24da03c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33, skipping insertion in model container [2019-11-16 00:30:33,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,168 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:30:33,186 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:30:33,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:30:33,422 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:30:33,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:30:33,548 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:30:33,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33 WrapperNode [2019-11-16 00:30:33,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:30:33,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:30:33,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:30:33,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:30:33,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:30:33,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:30:33,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:30:33,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:30:33,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (1/1) ... [2019-11-16 00:30:33,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:30:33,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:30:33,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:30:33,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:30:33,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/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 [2019-11-16 00:30:33,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:30:33,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:30:33,811 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:30:33,812 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-16 00:30:33,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:30:33 BoogieIcfgContainer [2019-11-16 00:30:33,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:30:33,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:30:33,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:30:33,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:30:33,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:30:33" (1/3) ... [2019-11-16 00:30:33,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d0fc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:30:33, skipping insertion in model container [2019-11-16 00:30:33,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:33" (2/3) ... [2019-11-16 00:30:33,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d0fc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:30:33, skipping insertion in model container [2019-11-16 00:30:33,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:30:33" (3/3) ... [2019-11-16 00:30:33,820 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2019-11-16 00:30:33,829 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:30:33,835 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:30:33,844 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:30:33,864 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:30:33,864 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:30:33,864 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:30:33,864 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:30:33,864 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:30:33,864 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:30:33,864 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:30:33,865 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:30:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-16 00:30:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-16 00:30:33,882 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:30:33,883 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-16 00:30:33,885 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:30:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:30:33,891 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-11-16 00:30:33,899 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:30:33,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066798455] [2019-11-16 00:30:33,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:33,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:33,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:30:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:30:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:34,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066798455] [2019-11-16 00:30:34,090 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:30:34,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-16 00:30:34,091 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927742160] [2019-11-16 00:30:34,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-16 00:30:34,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:30:34,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-16 00:30:34,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-16 00:30:34,116 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-16 00:30:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:30:34,160 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-11-16 00:30:34,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-16 00:30:34,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-16 00:30:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:30:34,173 INFO L225 Difference]: With dead ends: 17 [2019-11-16 00:30:34,173 INFO L226 Difference]: Without dead ends: 7 [2019-11-16 00:30:34,176 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-16 00:30:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-16 00:30:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-16 00:30:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-16 00:30:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-16 00:30:34,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-16 00:30:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:30:34,237 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-16 00:30:34,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-16 00:30:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-16 00:30:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-16 00:30:34,238 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:30:34,238 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-16 00:30:34,238 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:30:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:30:34,239 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-11-16 00:30:34,239 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:30:34,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325751828] [2019-11-16 00:30:34,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:34,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:34,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:30:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:30:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:34,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325751828] [2019-11-16 00:30:34,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714087986] [2019-11-16 00:30:34,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/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 [2019-11-16 00:30:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:30:34,395 WARN L254 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-16 00:30:34,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:30:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:34,437 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:30:34,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-11-16 00:30:34,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102659411] [2019-11-16 00:30:34,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:30:34,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:30:34,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:30:34,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:30:34,440 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-11-16 00:30:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:30:34,462 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-16 00:30:34,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:30:34,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-16 00:30:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:30:34,463 INFO L225 Difference]: With dead ends: 12 [2019-11-16 00:30:34,463 INFO L226 Difference]: Without dead ends: 8 [2019-11-16 00:30:34,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:30:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-16 00:30:34,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-16 00:30:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-16 00:30:34,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-16 00:30:34,467 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-16 00:30:34,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:30:34,468 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-16 00:30:34,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:30:34,468 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-16 00:30:34,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-16 00:30:34,468 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:30:34,469 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-16 00:30:34,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:30:34,672 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:30:34,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:30:34,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-11-16 00:30:34,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:30:34,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010537392] [2019-11-16 00:30:34,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:34,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:34,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:30:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:30:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:34,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010537392] [2019-11-16 00:30:34,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694050776] [2019-11-16 00:30:34,772 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/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 [2019-11-16 00:30:34,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:30:34,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:30:34,805 WARN L254 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-16 00:30:34,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:30:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:34,836 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:30:34,836 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-16 00:30:34,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624393774] [2019-11-16 00:30:34,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-16 00:30:34,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:30:34,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-16 00:30:34,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:30:34,838 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-11-16 00:30:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:30:34,884 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-16 00:30:34,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:30:34,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-16 00:30:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:30:34,886 INFO L225 Difference]: With dead ends: 13 [2019-11-16 00:30:34,886 INFO L226 Difference]: Without dead ends: 9 [2019-11-16 00:30:34,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:30:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-16 00:30:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-16 00:30:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-16 00:30:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-16 00:30:34,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-11-16 00:30:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:30:34,889 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-16 00:30:34,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-16 00:30:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-16 00:30:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-16 00:30:34,890 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:30:34,890 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-11-16 00:30:35,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:30:35,095 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:30:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:30:35,095 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-11-16 00:30:35,095 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:30:35,095 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510248519] [2019-11-16 00:30:35,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:35,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:35,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:30:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:30:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:35,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510248519] [2019-11-16 00:30:35,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504933299] [2019-11-16 00:30:35,208 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/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 [2019-11-16 00:30:35,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-16 00:30:35,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:30:35,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-16 00:30:35,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:30:35,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:30:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-16 00:30:35,344 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-16 00:30:35,344 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2019-11-16 00:30:35,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339836965] [2019-11-16 00:30:35,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:30:35,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:30:35,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:30:35,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:30:35,346 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2019-11-16 00:30:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:30:35,399 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-11-16 00:30:35,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:30:35,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-16 00:30:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:30:35,400 INFO L225 Difference]: With dead ends: 9 [2019-11-16 00:30:35,400 INFO L226 Difference]: Without dead ends: 0 [2019-11-16 00:30:35,400 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:30:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-16 00:30:35,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-16 00:30:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-16 00:30:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-16 00:30:35,401 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2019-11-16 00:30:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:30:35,402 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-16 00:30:35,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:30:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-16 00:30:35,402 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-16 00:30:35,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:30:35,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-16 00:30:35,631 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-16 00:30:35,632 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-16 00:30:35,632 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-16 00:30:35,632 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-16 00:30:35,632 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-16 00:30:35,633 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0)) (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 6)) [2019-11-16 00:30:35,633 INFO L443 ceAbstractionStarter]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2019-11-16 00:30:35,633 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-16 00:30:35,633 INFO L446 ceAbstractionStarter]: At program point L4-2(lines 1 20) the Hoare annotation is: true [2019-11-16 00:30:35,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:30:35 BoogieIcfgContainer [2019-11-16 00:30:35,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:30:35,645 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:30:35,645 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:30:35,645 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:30:35,645 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:30:33" (3/4) ... [2019-11-16 00:30:35,649 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-16 00:30:35,659 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-16 00:30:35,659 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-16 00:30:35,695 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d453f32e-fc86-4283-8d29-48ec74951350/bin/uautomizer/witness.graphml [2019-11-16 00:30:35,695 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:30:35,697 INFO L168 Benchmark]: Toolchain (without parser) took 2547.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 944.8 MB in the beginning and 1.0 GB in the end (delta: -94.6 MB). Peak memory consumption was 55.3 MB. Max. memory is 11.5 GB. [2019-11-16 00:30:35,698 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 962.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:30:35,699 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -202.5 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:30:35,699 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.52 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. [2019-11-16 00:30:35,699 INFO L168 Benchmark]: Boogie Preprocessor took 20.42 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. [2019-11-16 00:30:35,700 INFO L168 Benchmark]: RCFGBuilder took 200.02 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-16 00:30:35,701 INFO L168 Benchmark]: TraceAbstraction took 1830.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 81.5 MB). Peak memory consumption was 81.5 MB. Max. memory is 11.5 GB. [2019-11-16 00:30:35,701 INFO L168 Benchmark]: Witness Printer took 50.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:30:35,704 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 962.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 400.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -202.5 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.52 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 20.42 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 200.02 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1830.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 81.5 MB). Peak memory consumption was 81.5 MB. Max. memory is 11.5 GB. * Witness Printer took 50.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB 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: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (x <= 0 && 0 <= x) || (x + 4294967295) % 4294967296 < 6 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: SAFE, OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 3 SDslu, 17 SDs, 0 SdLazy, 40 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 16 HoareAnnotationTreeSize, 2 FomulaSimplifications, 28 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 47 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 976 SizeOfPredicates, 3 NumberOfNonLiveVariables, 67 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 6/20 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 correct! Received shutdown request...