./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.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/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 264bfe6ed9d94f386b1000d33074dec83a5848c5 ................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 264bfe6ed9d94f386b1000d33074dec83a5848c5 ....................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:32,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:32,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:32,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:32,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:32,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:32,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:32,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:32,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:32,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:32,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:32,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:32,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:32,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:32,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:32,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:32,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:32,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:32,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:32,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:32,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:32,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:32,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:32,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:33,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:33,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:33,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:33,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:33,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:33,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:33,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:33,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:33,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:33,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:33,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:33,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:33,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:33,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:33,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:33,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:33,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:33,016 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:21:33,037 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:33,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:33,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:33,038 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:33,038 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:33,038 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:33,038 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:21:33,039 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:33,039 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:33,039 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:21:33,039 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:21:33,039 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:33,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:33,040 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:33,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:21:33,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:33,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:33,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:21:33,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:33,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:21:33,041 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:33,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:21:33,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:21:33,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:33,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:33,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:33,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:33,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:33,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:33,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:33,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:21:33,043 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:21:33,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:21:33,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:21:33,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:33,043 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan 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 -> Taipan 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 -> 264bfe6ed9d94f386b1000d33074dec83a5848c5 [2019-10-22 11:21:33,066 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:33,075 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:33,079 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:33,080 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:33,081 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:33,081 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2019-10-22 11:21:33,127 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/data/dcaee6135/09ba1b6152184b13904f23e7e4e3ce2f/FLAG2c9fcebdd [2019-10-22 11:21:33,556 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:33,557 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2019-10-22 11:21:33,563 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/data/dcaee6135/09ba1b6152184b13904f23e7e4e3ce2f/FLAG2c9fcebdd [2019-10-22 11:21:33,949 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/data/dcaee6135/09ba1b6152184b13904f23e7e4e3ce2f [2019-10-22 11:21:33,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:33,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:33,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:33,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:33,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:33,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:33" (1/1) ... [2019-10-22 11:21:33,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21830578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:33, skipping insertion in model container [2019-10-22 11:21:33,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:33" (1/1) ... [2019-10-22 11:21:33,967 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:33,981 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:34,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:34,122 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:34,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:34,202 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:34,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34 WrapperNode [2019-10-22 11:21:34,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:34,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:34,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:34,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:34,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:34,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:34,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:34,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:34,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:34,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:34,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:34,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:34,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:34,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:34,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:34,406 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:34,406 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:21:34,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:34 BoogieIcfgContainer [2019-10-22 11:21:34,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:34,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:34,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:34,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:34,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:33" (1/3) ... [2019-10-22 11:21:34,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d33382e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:34, skipping insertion in model container [2019-10-22 11:21:34,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (2/3) ... [2019-10-22 11:21:34,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d33382e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:34, skipping insertion in model container [2019-10-22 11:21:34,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:34" (3/3) ... [2019-10-22 11:21:34,414 INFO L109 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2019-10-22 11:21:34,422 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:34,427 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:21:34,435 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:21:34,453 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:34,453 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:34,453 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:34,454 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:34,454 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:34,454 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:34,454 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:34,454 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:21:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:21:34,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:34,473 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:21:34,475 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:34,479 INFO L82 PathProgramCache]: Analyzing trace with hash 30078084, now seen corresponding path program 1 times [2019-10-22 11:21:34,485 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:34,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308991804] [2019-10-22 11:21:34,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:34,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:34,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:34,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308991804] [2019-10-22 11:21:34,559 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:34,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:21:34,561 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121943385] [2019-10-22 11:21:34,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:21:34,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:34,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:21:34,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:21:34,575 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-10-22 11:21:34,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:34,586 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-10-22 11:21:34,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:21:34,587 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 11:21:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:34,594 INFO L225 Difference]: With dead ends: 19 [2019-10-22 11:21:34,594 INFO L226 Difference]: Without dead ends: 7 [2019-10-22 11:21:34,596 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:21:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-10-22 11:21:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-10-22 11:21:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-10-22 11:21:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-10-22 11:21:34,619 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-10-22 11:21:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:34,620 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-10-22 11:21:34,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:21:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-10-22 11:21:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 11:21:34,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:34,621 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 11:21:34,621 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 925774290, now seen corresponding path program 1 times [2019-10-22 11:21:34,621 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:34,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513418537] [2019-10-22 11:21:34,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:34,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:34,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:34,661 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:21:34,661 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:21:34,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:21:34 BoogieIcfgContainer [2019-10-22 11:21:34,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:21:34,678 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:21:34,678 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:21:34,679 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:21:34,679 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:34" (3/4) ... [2019-10-22 11:21:34,683 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 11:21:34,683 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:21:34,685 INFO L168 Benchmark]: Toolchain (without parser) took 732.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 943.2 MB in the beginning and 1.1 GB in the end (delta: -157.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:34,686 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:34,687 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 943.2 MB in the beginning and 1.1 GB in the end (delta: -197.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:34,687 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.51 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:34,687 INFO L168 Benchmark]: Boogie Preprocessor took 19.41 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:34,688 INFO L168 Benchmark]: RCFGBuilder took 160.47 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: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:34,688 INFO L168 Benchmark]: TraceAbstraction took 269.68 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: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:34,689 INFO L168 Benchmark]: Witness Printer took 5.00 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:34,691 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 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 249.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 943.2 MB in the beginning and 1.1 GB in the end (delta: -197.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.51 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 19.41 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 160.47 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: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 269.68 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: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * Witness Printer took 5.00 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 32, overapproximation of someBinaryArithmeticFLOAToperation at line 24. Possible FailurePath: [L15] float x = __VERIFIER_nondet_float() ; [L16] float exp = 1.0 ; [L17] float term = 1.0 ; [L18] unsigned int count = 1 ; [L19] float result = 2*(1/(1-x)) ; [L20] int temp ; [L22] COND TRUE 1 [L24] term = term * (x/count) [L25] exp = exp + term [L26] count++ [L28] temp = __VERIFIER_nondet_int() [L29] COND TRUE temp ==0 [L9] COND TRUE !(cond) [L9] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:36,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:36,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:36,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:36,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:36,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:36,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:36,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:36,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:36,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:36,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:36,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:36,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:36,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:36,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:36,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:36,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:36,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:36,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:36,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:36,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:36,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:36,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:36,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:36,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:36,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:36,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:36,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:36,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:36,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:36,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:36,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:36,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:36,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:36,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:36,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:36,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:36,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:36,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:36,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:36,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:36,818 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:21:36,835 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:36,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:36,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:36,846 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:36,847 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:36,847 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:36,847 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:36,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:36,847 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:36,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:36,848 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:36,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:36,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:36,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:21:36,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:36,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:21:36,849 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:21:36,849 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:21:36,849 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:36,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:21:36,850 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:21:36,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:21:36,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:36,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:36,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:36,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:36,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:36,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:36,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:36,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:21:36,853 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:21:36,853 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:21:36,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:21:36,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:36,854 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan 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 -> Taipan 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 -> 264bfe6ed9d94f386b1000d33074dec83a5848c5 [2019-10-22 11:21:36,900 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:36,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:36,917 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:36,919 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:36,919 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:36,921 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2019-10-22 11:21:36,977 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/data/15fda4a24/10a5bc67ec0d4800a5bf4c6b6b657de2/FLAGcdccef222 [2019-10-22 11:21:37,333 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:37,334 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2019-10-22 11:21:37,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/data/15fda4a24/10a5bc67ec0d4800a5bf4c6b6b657de2/FLAGcdccef222 [2019-10-22 11:21:37,740 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/data/15fda4a24/10a5bc67ec0d4800a5bf4c6b6b657de2 [2019-10-22 11:21:37,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:37,743 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:37,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:37,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:37,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:37,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:37" (1/1) ... [2019-10-22 11:21:37,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@487a8b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:37, skipping insertion in model container [2019-10-22 11:21:37,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:37" (1/1) ... [2019-10-22 11:21:37,758 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:37,773 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:37,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:37,979 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:37,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:38,012 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:38,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38 WrapperNode [2019-10-22 11:21:38,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:38,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:38,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:38,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:38,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (1/1) ... [2019-10-22 11:21:38,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (1/1) ... [2019-10-22 11:21:38,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:38,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:38,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:38,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:38,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (1/1) ... [2019-10-22 11:21:38,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (1/1) ... [2019-10-22 11:21:38,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (1/1) ... [2019-10-22 11:21:38,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (1/1) ... [2019-10-22 11:21:38,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (1/1) ... [2019-10-22 11:21:38,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (1/1) ... [2019-10-22 11:21:38,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (1/1) ... [2019-10-22 11:21:38,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:38,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:38,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:38,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:38,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:38,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:42,469 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:42,470 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:21:42,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:42 BoogieIcfgContainer [2019-10-22 11:21:42,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:42,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:42,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:42,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:42,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:37" (1/3) ... [2019-10-22 11:21:42,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73479c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:42, skipping insertion in model container [2019-10-22 11:21:42,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:38" (2/3) ... [2019-10-22 11:21:42,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73479c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:42, skipping insertion in model container [2019-10-22 11:21:42,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:42" (3/3) ... [2019-10-22 11:21:42,479 INFO L109 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2019-10-22 11:21:42,489 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:42,508 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:21:42,526 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:21:42,547 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:42,547 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:42,547 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:42,548 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:42,548 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:42,548 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:42,548 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:42,548 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:21:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:21:42,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:42,568 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:21:42,570 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:42,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:42,576 INFO L82 PathProgramCache]: Analyzing trace with hash 30078084, now seen corresponding path program 1 times [2019-10-22 11:21:42,586 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:42,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021682052] [2019-10-22 11:21:42,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-10-22 11:21:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:42,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 11:21:42,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:42,890 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:42,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021682052] [2019-10-22 11:21:42,894 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:42,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:21:42,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691753570] [2019-10-22 11:21:42,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:21:42,899 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:21:42,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:21:42,916 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-10-22 11:21:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:42,931 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-10-22 11:21:42,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:21:42,932 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 11:21:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:42,940 INFO L225 Difference]: With dead ends: 19 [2019-10-22 11:21:42,940 INFO L226 Difference]: Without dead ends: 7 [2019-10-22 11:21:42,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:21:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-10-22 11:21:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-10-22 11:21:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-10-22 11:21:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-10-22 11:21:42,970 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-10-22 11:21:42,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:42,971 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-10-22 11:21:42,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:21:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-10-22 11:21:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 11:21:42,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:42,972 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 11:21:43,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-10-22 11:21:43,184 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:43,185 INFO L82 PathProgramCache]: Analyzing trace with hash 925774290, now seen corresponding path program 1 times [2019-10-22 11:21:43,185 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:43,185 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793691711] [2019-10-22 11:21:43,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-10-22 11:21:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:44,357 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:21:44,358 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:21:44,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-10-22 11:21:44,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:21:44 BoogieIcfgContainer [2019-10-22 11:21:44,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:21:44,582 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:21:44,582 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:21:44,583 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:21:44,583 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:42" (3/4) ... [2019-10-22 11:21:44,585 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:21:44,618 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f9cdab41-47f4-4173-a224-244dc8471202/bin/utaipan/witness.graphml [2019-10-22 11:21:44,618 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:21:44,620 INFO L168 Benchmark]: Toolchain (without parser) took 6876.55 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 86.5 MB). Free memory was 951.0 MB in the beginning and 1.0 GB in the end (delta: -64.4 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:44,621 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:44,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.07 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:44,622 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.08 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 86.5 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -141.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:44,622 INFO L168 Benchmark]: Boogie Preprocessor took 26.52 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: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:44,623 INFO L168 Benchmark]: RCFGBuilder took 4331.87 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: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:44,623 INFO L168 Benchmark]: TraceAbstraction took 2109.99 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: 33.1 MB). Peak memory consumption was 33.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:44,624 INFO L168 Benchmark]: Witness Printer took 35.56 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: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:44,627 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 269.07 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 99.08 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 86.5 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -141.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.52 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: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 4331.87 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: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2109.99 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: 33.1 MB). Peak memory consumption was 33.1 MB. Max. memory is 11.5 GB. * Witness Printer took 35.56 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: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] float x = __VERIFIER_nondet_float() ; [L16] float exp = 1.0 ; [L17] float term = 1.0 ; [L18] unsigned int count = 1 ; [L19] float result = 2*(1/(1-x)) ; [L20] int temp ; [L22] COND TRUE 1 [L24] term = term * (x/count) [L25] exp = exp + term [L26] count++ [L28] temp = __VERIFIER_nondet_int() [L29] COND TRUE temp ==0 [L9] COND TRUE !(cond) [L9] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 32 SizeOfPredicates, 0 NumberOfNonLiveVariables, 12 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 incorrect! Received shutdown request...