./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test16.c -s /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/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 fa042b443dc45a7f1744078ac68f117b1cbe89b6 ................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 19:01:41,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:01:41,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:01:41,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:01:41,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:01:41,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:01:41,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:01:41,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:01:41,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:01:41,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:01:41,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:01:41,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:01:41,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:01:41,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:01:41,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:01:41,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:01:41,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:01:41,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:01:41,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:01:41,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:01:41,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:01:41,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:01:41,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:01:41,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:01:41,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:01:41,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:01:41,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:01:41,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:01:41,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:01:41,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:01:41,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:01:41,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:01:41,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:01:41,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:01:41,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:01:41,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:01:41,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:01:41,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:01:41,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:01:41,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:01:41,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:01:41,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 19:01:41,228 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:01:41,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:01:41,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 19:01:41,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 19:01:41,230 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 19:01:41,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:01:41,230 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 19:01:41,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 19:01:41,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 19:01:41,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:01:41,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:01:41,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:01:41,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:01:41,231 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 19:01:41,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:01:41,231 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:01:41,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:01:41,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:01:41,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 19:01:41,232 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:01:41,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:01:41,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:01:41,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:01:41,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:01:41,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:01:41,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 19:01:41,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 19:01:41,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:01:41,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:01:41,233 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_22e0e2e2-8da9-4654-a817-7bf7be9f992b/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 -> fa042b443dc45a7f1744078ac68f117b1cbe89b6 [2019-12-07 19:01:41,332 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:01:41,341 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:01:41,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:01:41,344 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:01:41,344 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:01:41,345 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test16.c [2019-12-07 19:01:41,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/data/6c1bb02be/7ecb22b781a44715998416df6eefd3d6/FLAGe7069d394 [2019-12-07 19:01:41,798 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:01:41,798 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/sv-benchmarks/c/ldv-regression/test16.c [2019-12-07 19:01:41,802 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/data/6c1bb02be/7ecb22b781a44715998416df6eefd3d6/FLAGe7069d394 [2019-12-07 19:01:41,812 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/data/6c1bb02be/7ecb22b781a44715998416df6eefd3d6 [2019-12-07 19:01:41,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:01:41,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:01:41,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:01:41,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:01:41,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:01:41,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:41,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f08bf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41, skipping insertion in model container [2019-12-07 19:01:41,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:41,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:01:41,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:01:41,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:01:41,975 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:01:41,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:01:41,999 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:01:42,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41 WrapperNode [2019-12-07 19:01:42,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:01:42,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:01:42,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:01:42,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:01:42,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:42,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:42,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:01:42,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:01:42,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:01:42,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:01:42,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:42,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:42,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:42,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:42,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:42,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:42,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (1/1) ... [2019-12-07 19:01:42,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:01:42,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:01:42,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:01:42,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:01:42,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/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 [2019-12-07 19:01:42,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 19:01:42,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:01:42,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:01:42,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 19:01:42,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-12-07 19:01:42,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 19:01:42,191 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:01:42,191 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 19:01:42,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:01:42 BoogieIcfgContainer [2019-12-07 19:01:42,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:01:42,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:01:42,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:01:42,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:01:42,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:01:41" (1/3) ... [2019-12-07 19:01:42,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2050496e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:01:42, skipping insertion in model container [2019-12-07 19:01:42,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:01:41" (2/3) ... [2019-12-07 19:01:42,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2050496e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:01:42, skipping insertion in model container [2019-12-07 19:01:42,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:01:42" (3/3) ... [2019-12-07 19:01:42,196 INFO L109 eAbstractionObserver]: Analyzing ICFG test16.c [2019-12-07 19:01:42,202 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:01:42,206 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:01:42,214 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:01:42,228 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:01:42,228 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:01:42,228 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:01:42,228 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:01:42,228 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:01:42,228 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:01:42,228 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:01:42,228 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:01:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-12-07 19:01:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 19:01:42,240 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:01:42,241 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 19:01:42,241 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:01:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:01:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash 925607, now seen corresponding path program 1 times [2019-12-07 19:01:42,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 19:01:42,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755304352] [2019-12-07 19:01:42,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:01:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:01:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:01:42,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755304352] [2019-12-07 19:01:42,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:01:42,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 19:01:42,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336961665] [2019-12-07 19:01:42,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 19:01:42,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 19:01:42,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 19:01:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:01:42,400 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2019-12-07 19:01:42,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:01:42,425 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2019-12-07 19:01:42,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 19:01:42,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 19:01:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:01:42,432 INFO L225 Difference]: With dead ends: 13 [2019-12-07 19:01:42,432 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 19:01:42,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:01:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 19:01:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 19:01:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 19:01:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 19:01:42,450 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2019-12-07 19:01:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:01:42,450 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 19:01:42,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 19:01:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 19:01:42,450 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 19:01:42,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 19:01:42,466 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 19:01:42,466 INFO L246 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2019-12-07 19:01:42,467 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 19:01:42,467 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 19:01:42,467 INFO L242 CegarLoopResult]: At program point L27(lines 17 28) the Hoare annotation is: (not (= |~#b~0.base| |~#a~0.base|)) [2019-12-07 19:01:42,467 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2019-12-07 19:01:42,467 INFO L242 CegarLoopResult]: At program point L11(lines 4 12) the Hoare annotation is: (not (= |~#b~0.base| |~#a~0.base|)) [2019-12-07 19:01:42,467 INFO L242 CegarLoopResult]: At program point L6(lines 4 12) the Hoare annotation is: false [2019-12-07 19:01:42,468 INFO L246 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2019-12-07 19:01:42,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:01:42 BoogieIcfgContainer [2019-12-07 19:01:42,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:01:42,482 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:01:42,482 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:01:42,482 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:01:42,482 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:01:42" (3/4) ... [2019-12-07 19:01:42,485 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 19:01:42,492 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 19:01:42,492 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 19:01:42,492 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 19:01:42,522 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_22e0e2e2-8da9-4654-a817-7bf7be9f992b/bin/uautomizer/witness.graphml [2019-12-07 19:01:42,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:01:42,523 INFO L168 Benchmark]: Toolchain (without parser) took 708.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 939.7 MB in the beginning and 1.0 GB in the end (delta: -101.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:01:42,524 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:01:42,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.39 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -151.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-12-07 19:01:42,524 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.07 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:01:42,525 INFO L168 Benchmark]: Boogie Preprocessor took 15.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:01:42,525 INFO L168 Benchmark]: RCFGBuilder took 150.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 19:01:42,525 INFO L168 Benchmark]: TraceAbstraction took 289.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 11.5 GB. [2019-12-07 19:01:42,526 INFO L168 Benchmark]: Witness Printer took 40.24 ms. Allocated memory is still 1.1 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. [2019-12-07 19:01:42,528 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 184.39 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -151.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.07 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 150.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 289.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 11.5 GB. * Witness Printer took 40.24 ms. Allocated memory is still 1.1 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: 10]: 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: 4]: Loop Invariant Derived loop invariant: !(b == a) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: !(b == a) - InvariantResult [Line: 4]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: SAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 4 SDtfs, 4 SDslu, 4 SDs, 0 SdLazy, 3 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 5 NumberOfFragments, 9 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 24 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...