./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0e23aa9bbb10ea2680f8206f9d74b19166b1199 ............................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0e23aa9bbb10ea2680f8206f9d74b19166b1199 ................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-28 07:38:24,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:38:25,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:38:25,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:38:25,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:38:25,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:38:25,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:38:25,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:38:25,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:38:25,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:38:25,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:38:25,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:38:25,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:38:25,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:38:25,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:38:25,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:38:25,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:38:25,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:38:25,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:38:25,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:38:25,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:38:25,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:38:25,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:38:25,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:38:25,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:38:25,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:38:25,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:38:25,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:38:25,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:38:25,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:38:25,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:38:25,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:38:25,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:38:25,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:38:25,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:38:25,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:38:25,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:38:25,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:38:25,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:38:25,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:38:25,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:38:25,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:38:25,172 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:38:25,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:38:25,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:38:25,173 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:38:25,174 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:38:25,174 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:38:25,174 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:38:25,174 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:38:25,175 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:38:25,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:38:25,175 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:38:25,175 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:38:25,175 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:38:25,176 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:38:25,176 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:38:25,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:38:25,177 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:38:25,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:38:25,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:38:25,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:38:25,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:38:25,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:38:25,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:38:25,179 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:38:25,179 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:38:25,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:38:25,179 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:38:25,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:38:25,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:38:25,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:38:25,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:38:25,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:25,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:38:25,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:38:25,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:38:25,181 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:38:25,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:38:25,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:38:25,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:38:25,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:38:25,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-11-28 07:38:25,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:38:25,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:38:25,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:38:25,419 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:38:25,420 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:38:25,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-11-28 07:38:25,498 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/data/7ec73b0d4/01a29d6066c84d709f197487c56871d4/FLAG55d1dc716 [2020-11-28 07:38:25,938 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:38:25,939 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-11-28 07:38:25,947 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/data/7ec73b0d4/01a29d6066c84d709f197487c56871d4/FLAG55d1dc716 [2020-11-28 07:38:25,975 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/data/7ec73b0d4/01a29d6066c84d709f197487c56871d4 [2020-11-28 07:38:25,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:38:25,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:38:25,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:25,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:38:25,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:38:25,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:25" (1/1) ... [2020-11-28 07:38:26,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@623f5733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:25, skipping insertion in model container [2020-11-28 07:38:26,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:25" (1/1) ... [2020-11-28 07:38:26,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:38:26,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:38:26,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:26,256 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:38:26,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:26,293 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:38:26,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26 WrapperNode [2020-11-28 07:38:26,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:26,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:26,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:38:26,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:38:26,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (1/1) ... [2020-11-28 07:38:26,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (1/1) ... [2020-11-28 07:38:26,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:26,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:38:26,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:38:26,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:38:26,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (1/1) ... [2020-11-28 07:38:26,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (1/1) ... [2020-11-28 07:38:26,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (1/1) ... [2020-11-28 07:38:26,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (1/1) ... [2020-11-28 07:38:26,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (1/1) ... [2020-11-28 07:38:26,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (1/1) ... [2020-11-28 07:38:26,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (1/1) ... [2020-11-28 07:38:26,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:38:26,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:38:26,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:38:26,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:38:26,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/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 [2020-11-28 07:38:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:38:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:38:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:38:26,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:38:26,650 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:38:26,651 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:38:26,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:26 BoogieIcfgContainer [2020-11-28 07:38:26,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:38:26,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:38:26,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:38:26,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:38:26,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:38:25" (1/3) ... [2020-11-28 07:38:26,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f70ec35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:26, skipping insertion in model container [2020-11-28 07:38:26,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:26" (2/3) ... [2020-11-28 07:38:26,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f70ec35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:26, skipping insertion in model container [2020-11-28 07:38:26,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:26" (3/3) ... [2020-11-28 07:38:26,679 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-11-28 07:38:26,689 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:38:26,692 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:38:26,704 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:38:26,738 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:38:26,739 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:38:26,739 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:38:26,739 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:38:26,739 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:38:26,739 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:38:26,740 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:38:26,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:38:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-11-28 07:38:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:38:26,754 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:26,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:38:26,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 63087505, now seen corresponding path program 1 times [2020-11-28 07:38:26,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:26,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463854148] [2020-11-28 07:38:26,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:26,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463854148] [2020-11-28 07:38:26,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:26,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:38:26,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707339598] [2020-11-28 07:38:26,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:38:26,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:26,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:38:26,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:38:26,927 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 2 states. [2020-11-28 07:38:26,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:26,940 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-11-28 07:38:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:38:26,941 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-28 07:38:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:26,947 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:38:26,948 INFO L226 Difference]: Without dead ends: 7 [2020-11-28 07:38:26,950 INFO L677 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 [2020-11-28 07:38:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-28 07:38:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-28 07:38:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 07:38:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-11-28 07:38:26,978 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-11-28 07:38:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:26,978 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-11-28 07:38:26,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:38:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-11-28 07:38:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:38:26,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:26,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:38:26,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:38:26,979 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:26,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:26,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1928748880, now seen corresponding path program 1 times [2020-11-28 07:38:26,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:26,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859962949] [2020-11-28 07:38:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:27,036 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:27,075 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:27,090 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:38:27,090 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:38:27,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:38:27,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:27 BoogieIcfgContainer [2020-11-28 07:38:27,111 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:27,111 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:27,111 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:27,112 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:27,112 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:26" (3/4) ... [2020-11-28 07:38:27,119 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:38:27,119 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:27,125 INFO L168 Benchmark]: Toolchain (without parser) took 1139.12 ms. Allocated memory is still 111.1 MB. Free memory was 77.3 MB in the beginning and 50.7 MB in the end (delta: 26.6 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:27,125 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory was 38.5 MB in the beginning and 38.4 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:27,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.20 ms. Allocated memory is still 111.1 MB. Free memory was 77.1 MB in the beginning and 86.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:27,127 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.91 ms. Allocated memory is still 111.1 MB. Free memory was 86.3 MB in the beginning and 84.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:27,128 INFO L168 Benchmark]: Boogie Preprocessor took 32.77 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 84.3 MB in the end (delta: 566.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:27,129 INFO L168 Benchmark]: RCFGBuilder took 291.53 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 70.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:27,130 INFO L168 Benchmark]: TraceAbstraction took 457.38 ms. Allocated memory is still 111.1 MB. Free memory was 70.1 MB in the beginning and 50.7 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:27,130 INFO L168 Benchmark]: Witness Printer took 8.13 ms. Allocated memory is still 111.1 MB. Free memory is still 50.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:27,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory was 38.5 MB in the beginning and 38.4 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.20 ms. Allocated memory is still 111.1 MB. Free memory was 77.1 MB in the beginning and 86.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.91 ms. Allocated memory is still 111.1 MB. Free memory was 86.3 MB in the beginning and 84.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.77 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 84.3 MB in the end (delta: 566.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 291.53 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 70.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 457.38 ms. Allocated memory is still 111.1 MB. Free memory was 70.1 MB in the beginning and 50.7 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Witness Printer took 8.13 ms. Allocated memory is still 111.1 MB. Free memory is still 50.7 MB. There was no memory consumed. Max. memory is 16.1 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 37, overapproximation of someBinaryArithmeticFLOAToperation at line 29. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L9] __assert_fail("0", "loop1-2.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 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=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: 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, ACCELERATED_INTERPOLATION: 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 0.2.0-a4ecdab [2020-11-28 07:38:29,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:38:29,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:38:29,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:38:29,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:38:29,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:38:29,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:38:29,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:38:29,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:38:29,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:38:29,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:38:29,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:38:29,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:38:29,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:38:29,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:38:29,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:38:29,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:38:29,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:38:29,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:38:29,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:38:29,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:38:29,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:38:29,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:38:29,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:38:29,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:38:29,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:38:29,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:38:29,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:38:29,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:38:29,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:38:29,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:38:29,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:38:29,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:38:29,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:38:29,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:38:29,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:38:29,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:38:29,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:38:29,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:38:29,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:38:29,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:38:29,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-28 07:38:29,774 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:38:29,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:38:29,777 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:38:29,777 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:38:29,777 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:38:29,777 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:38:29,778 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:38:29,778 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:38:29,778 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:38:29,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:38:29,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:38:29,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:38:29,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:38:29,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:38:29,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:38:29,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:38:29,782 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:38:29,783 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 07:38:29,783 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 07:38:29,783 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:38:29,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:38:29,784 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:38:29,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:38:29,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:38:29,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 07:38:29,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:38:29,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:38:29,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:29,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:38:29,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:38:29,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:38:29,786 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-28 07:38:29,786 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 07:38:29,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:38:29,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:38:29,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:38:29,787 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-11-28 07:38:30,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:38:30,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:38:30,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:38:30,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:38:30,221 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:38:30,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-11-28 07:38:30,296 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/data/ba67c2992/c053352a262848a0948789007abf8e0f/FLAG98286846e [2020-11-28 07:38:30,843 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:38:30,844 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-11-28 07:38:30,850 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/data/ba67c2992/c053352a262848a0948789007abf8e0f/FLAG98286846e [2020-11-28 07:38:31,221 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/data/ba67c2992/c053352a262848a0948789007abf8e0f [2020-11-28 07:38:31,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:38:31,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:38:31,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:31,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:38:31,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:38:31,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f485b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31, skipping insertion in model container [2020-11-28 07:38:31,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:38:31,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:38:31,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:31,498 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:38:31,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:31,530 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:38:31,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31 WrapperNode [2020-11-28 07:38:31,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:31,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:31,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:38:31,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:38:31,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:31,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:38:31,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:38:31,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:38:31,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (1/1) ... [2020-11-28 07:38:31,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:38:31,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:38:31,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:38:31,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:38:31,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/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 [2020-11-28 07:38:31,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 07:38:31,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:38:31,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:38:31,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:38:35,317 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:38:35,317 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:38:35,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:35 BoogieIcfgContainer [2020-11-28 07:38:35,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:38:35,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:38:35,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:38:35,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:38:35,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:38:31" (1/3) ... [2020-11-28 07:38:35,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ed0b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:35, skipping insertion in model container [2020-11-28 07:38:35,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:31" (2/3) ... [2020-11-28 07:38:35,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ed0b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:35, skipping insertion in model container [2020-11-28 07:38:35,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:35" (3/3) ... [2020-11-28 07:38:35,343 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-11-28 07:38:35,358 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:38:35,372 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:38:35,396 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:38:35,420 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:38:35,421 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:38:35,421 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:38:35,421 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:38:35,421 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:38:35,421 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:38:35,422 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:38:35,422 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:38:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-28 07:38:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:38:35,458 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:35,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:38:35,459 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:35,467 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-11-28 07:38:35,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:38:35,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125903340] [2020-11-28 07:38:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/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 [2020-11-28 07:38:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:35,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-28 07:38:35,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:35,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:35,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125903340] [2020-11-28 07:38:35,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:35,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-28 07:38:35,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792129278] [2020-11-28 07:38:35,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:38:35,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:38:35,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:38:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:38:35,850 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-28 07:38:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:35,865 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-28 07:38:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:38:35,866 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-28 07:38:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:35,874 INFO L225 Difference]: With dead ends: 21 [2020-11-28 07:38:35,874 INFO L226 Difference]: Without dead ends: 8 [2020-11-28 07:38:35,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:38:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-28 07:38:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-28 07:38:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 07:38:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-11-28 07:38:35,908 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-11-28 07:38:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:35,908 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-11-28 07:38:35,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:38:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-11-28 07:38:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:38:35,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:35,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:36,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 07:38:36,123 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:36,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-11-28 07:38:36,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:38:36,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424977722] [2020-11-28 07:38:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/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 [2020-11-28 07:38:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:36,928 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:37,543 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:37,612 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-28 07:38:37,612 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:38:37,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 07:38:37,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:37 BoogieIcfgContainer [2020-11-28 07:38:37,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:37,842 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:37,842 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:37,842 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:37,843 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:35" (3/4) ... [2020-11-28 07:38:37,845 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:38:37,896 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7edfc75b-2fe6-4b71-980e-fef03badc2a3/bin/utaipan/witness.graphml [2020-11-28 07:38:37,897 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:37,900 INFO L168 Benchmark]: Toolchain (without parser) took 6671.13 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 33.0 MB in the beginning and 50.1 MB in the end (delta: -17.1 MB). Peak memory consumption was 875.5 kB. Max. memory is 16.1 GB. [2020-11-28 07:38:37,901 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 54.5 MB. Free memory was 36.2 MB in the beginning and 36.2 MB in the end (delta: 25.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:37,903 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.31 ms. Allocated memory is still 54.5 MB. Free memory was 32.8 MB in the beginning and 22.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:37,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.74 ms. Allocated memory is still 54.5 MB. Free memory was 22.6 MB in the beginning and 21.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:37,909 INFO L168 Benchmark]: Boogie Preprocessor took 33.79 ms. Allocated memory is still 54.5 MB. Free memory was 21.1 MB in the beginning and 37.6 MB in the end (delta: -16.5 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:37,910 INFO L168 Benchmark]: RCFGBuilder took 3717.78 ms. Allocated memory is still 54.5 MB. Free memory was 37.6 MB in the beginning and 25.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:37,911 INFO L168 Benchmark]: TraceAbstraction took 2520.53 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 25.6 MB in the beginning and 52.0 MB in the end (delta: -26.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:37,911 INFO L168 Benchmark]: Witness Printer took 54.80 ms. Allocated memory is still 71.3 MB. Free memory was 52.0 MB in the beginning and 50.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:37,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 54.5 MB. Free memory was 36.2 MB in the beginning and 36.2 MB in the end (delta: 25.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 301.31 ms. Allocated memory is still 54.5 MB. Free memory was 32.8 MB in the beginning and 22.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.74 ms. Allocated memory is still 54.5 MB. Free memory was 22.6 MB in the beginning and 21.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.79 ms. Allocated memory is still 54.5 MB. Free memory was 21.1 MB in the beginning and 37.6 MB in the end (delta: -16.5 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3717.78 ms. Allocated memory is still 54.5 MB. Free memory was 37.6 MB in the beginning and 25.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2520.53 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 25.6 MB in the beginning and 52.0 MB in the end (delta: -26.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. * Witness Printer took 54.80 ms. Allocated memory is still 71.3 MB. Free memory was 52.0 MB in the beginning and 50.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L9] __assert_fail("0", "loop1-2.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 0.9s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 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, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...