./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 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer --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 Automizer --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_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer --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 Automizer --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 0.2.0-69874e2 [2020-12-01 15:36:34,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:36:34,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:36:35,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:36:35,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:36:35,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:36:35,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:36:35,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:36:35,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:36:35,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:36:35,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:36:35,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:36:35,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:36:35,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:36:35,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:36:35,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:36:35,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:36:35,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:36:35,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:36:35,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:36:35,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:36:35,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:36:35,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:36:35,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:36:35,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:36:35,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:36:35,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:36:35,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:36:35,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:36:35,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:36:35,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:36:35,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:36:35,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:36:35,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:36:35,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:36:35,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:36:35,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:36:35,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:36:35,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:36:35,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:36:35,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:36:35,157 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:36:35,206 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:36:35,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:36:35,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:36:35,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:36:35,208 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:36:35,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:36:35,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:36:35,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:36:35,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:36:35,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:36:35,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:36:35,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:36:35,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:36:35,210 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:36:35,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:36:35,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:36:35,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:36:35,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:36:35,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:36:35,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:36:35,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:36:35,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:36:35,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:36:35,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:36:35,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:36:35,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:36:35,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:36:35,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:36:35,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:36:35,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-12-01 15:36:35,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:36:35,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:36:35,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:36:35,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:36:35,562 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:36:35,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-12-01 15:36:35,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/data/696382214/a18be7804ca942b8a20dda352fae7fac/FLAGebb33545d [2020-12-01 15:36:36,253 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:36:36,254 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-12-01 15:36:36,271 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/data/696382214/a18be7804ca942b8a20dda352fae7fac/FLAGebb33545d [2020-12-01 15:36:36,594 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/data/696382214/a18be7804ca942b8a20dda352fae7fac [2020-12-01 15:36:36,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:36:36,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:36:36,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:36:36,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:36:36,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:36:36,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:36:36" (1/1) ... [2020-12-01 15:36:36,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6ca5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:36, skipping insertion in model container [2020-12-01 15:36:36,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:36:36" (1/1) ... [2020-12-01 15:36:36,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:36:36,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:36:36,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:36:36,943 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:36:36,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:36:37,004 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:36:37,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37 WrapperNode [2020-12-01 15:36:37,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:36:37,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:36:37,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:36:37,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:36:37,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (1/1) ... [2020-12-01 15:36:37,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (1/1) ... [2020-12-01 15:36:37,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:36:37,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:36:37,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:36:37,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:36:37,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (1/1) ... [2020-12-01 15:36:37,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (1/1) ... [2020-12-01 15:36:37,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (1/1) ... [2020-12-01 15:36:37,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (1/1) ... [2020-12-01 15:36:37,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (1/1) ... [2020-12-01 15:36:37,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (1/1) ... [2020-12-01 15:36:37,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (1/1) ... [2020-12-01 15:36:37,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:36:37,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:36:37,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:36:37,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:36:37,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:36:37,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:36:37,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:36:37,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:36:37,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:36:37,400 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:36:37,401 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-01 15:36:37,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:36:37 BoogieIcfgContainer [2020-12-01 15:36:37,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:36:37,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:36:37,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:36:37,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:36:37,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:36:36" (1/3) ... [2020-12-01 15:36:37,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1dea74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:36:37, skipping insertion in model container [2020-12-01 15:36:37,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:37" (2/3) ... [2020-12-01 15:36:37,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1dea74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:36:37, skipping insertion in model container [2020-12-01 15:36:37,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:36:37" (3/3) ... [2020-12-01 15:36:37,415 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-12-01 15:36:37,432 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:36:37,436 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:36:37,450 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:36:37,479 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:36:37,479 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:36:37,480 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:36:37,480 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:36:37,480 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:36:37,480 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:36:37,481 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:36:37,481 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:36:37,497 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-01 15:36:37,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-01 15:36:37,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:36:37,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-01 15:36:37,505 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:36:37,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:36:37,526 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-12-01 15:36:37,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:36:37,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686444906] [2020-12-01 15:36:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:36:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:36:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:36:37,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686444906] [2020-12-01 15:36:37,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:36:37,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:36:37,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982339268] [2020-12-01 15:36:37,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 15:36:37,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:36:37,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 15:36:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:36:37,872 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-01 15:36:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:36:37,892 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-01 15:36:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 15:36:37,893 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-01 15:36:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:36:37,909 INFO L225 Difference]: With dead ends: 21 [2020-12-01 15:36:37,909 INFO L226 Difference]: Without dead ends: 8 [2020-12-01 15:36:37,922 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 [2020-12-01 15:36:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-01 15:36:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-01 15:36:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-01 15:36:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-01 15:36:37,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-01 15:36:37,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:36:37,972 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-01 15:36:37,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 15:36:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-01 15:36:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-01 15:36:37,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:36:37,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:36:37,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:36:37,975 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:36:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:36:37,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-12-01 15:36:37,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:36:37,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336570087] [2020-12-01 15:36:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:36:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:36:38,034 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:36:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:36:38,094 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:36:38,124 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:36:38,125 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:36:38,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 15:36:38,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:36:38 BoogieIcfgContainer [2020-12-01 15:36:38,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:36:38,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:36:38,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:36:38,170 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:36:38,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:36:37" (3/4) ... [2020-12-01 15:36:38,176 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-01 15:36:38,176 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:36:38,180 INFO L168 Benchmark]: Toolchain (without parser) took 1569.28 ms. Allocated memory is still 92.3 MB. Free memory was 60.8 MB in the beginning and 35.5 MB in the end (delta: 25.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:36:38,182 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 71.3 MB. Free memory was 37.8 MB in the beginning and 37.8 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:36:38,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.77 ms. Allocated memory is still 92.3 MB. Free memory was 60.8 MB in the beginning and 70.0 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:36:38,185 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.84 ms. Allocated memory is still 92.3 MB. Free memory was 70.0 MB in the beginning and 68.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:36:38,187 INFO L168 Benchmark]: Boogie Preprocessor took 27.67 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:36:38,188 INFO L168 Benchmark]: RCFGBuilder took 320.51 ms. Allocated memory is still 92.3 MB. Free memory was 67.3 MB in the beginning and 56.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:36:38,190 INFO L168 Benchmark]: TraceAbstraction took 763.63 ms. Allocated memory is still 92.3 MB. Free memory was 56.0 MB in the beginning and 36.2 MB in the end (delta: 19.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-01 15:36:38,192 INFO L168 Benchmark]: Witness Printer took 6.26 ms. Allocated memory is still 92.3 MB. Free memory was 35.8 MB in the beginning and 35.5 MB in the end (delta: 310.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:36:38,204 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 71.3 MB. Free memory was 37.8 MB in the beginning and 37.8 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 389.77 ms. Allocated memory is still 92.3 MB. Free memory was 60.8 MB in the beginning and 70.0 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 45.84 ms. Allocated memory is still 92.3 MB. Free memory was 70.0 MB in the beginning and 68.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.67 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 320.51 ms. Allocated memory is still 92.3 MB. Free memory was 67.3 MB in the beginning and 56.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 763.63 ms. Allocated memory is still 92.3 MB. Free memory was 56.0 MB in the beginning and 36.2 MB in the end (delta: 19.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Witness Printer took 6.26 ms. Allocated memory is still 92.3 MB. Free memory was 35.8 MB in the beginning and 35.5 MB in the end (delta: 310.0 kB). 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, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, 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, 2 GetRequests, 2 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 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 0.2.0-69874e2 [2020-12-01 15:36:41,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:36:41,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:36:41,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:36:41,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:36:41,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:36:41,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:36:41,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:36:41,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:36:41,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:36:41,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:36:41,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:36:41,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:36:41,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:36:41,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:36:41,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:36:41,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:36:41,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:36:41,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:36:41,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:36:41,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:36:41,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:36:41,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:36:41,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:36:41,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:36:41,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:36:41,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:36:41,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:36:41,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:36:41,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:36:41,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:36:41,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:36:41,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:36:41,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:36:41,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:36:41,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:36:41,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:36:41,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:36:41,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:36:41,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:36:41,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:36:41,473 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-01 15:36:41,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:36:41,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:36:41,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:36:41,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:36:41,509 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:36:41,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:36:41,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:36:41,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:36:41,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:36:41,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:36:41,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:36:41,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:36:41,512 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-01 15:36:41,512 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-01 15:36:41,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:36:41,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:36:41,513 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:36:41,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:36:41,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:36:41,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:36:41,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:36:41,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:36:41,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:36:41,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:36:41,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:36:41,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:36:41,516 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-01 15:36:41,516 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-01 15:36:41,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:36:41,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:36:41,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-01 15:36:41,518 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_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-12-01 15:36:42,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:36:42,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:36:42,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:36:42,093 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:36:42,094 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:36:42,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-12-01 15:36:42,205 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/data/668c11bbd/848067d44fc54dadb58844117fe37676/FLAG1a549646d [2020-12-01 15:36:42,818 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:36:42,819 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-12-01 15:36:42,830 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/data/668c11bbd/848067d44fc54dadb58844117fe37676/FLAG1a549646d [2020-12-01 15:36:43,171 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/data/668c11bbd/848067d44fc54dadb58844117fe37676 [2020-12-01 15:36:43,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:36:43,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:36:43,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:36:43,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:36:43,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:36:43,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b002094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43, skipping insertion in model container [2020-12-01 15:36:43,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:36:43,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:36:43,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:36:43,443 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:36:43,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:36:43,512 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:36:43,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43 WrapperNode [2020-12-01 15:36:43,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:36:43,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:36:43,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:36:43,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:36:43,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:36:43,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:36:43,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:36:43,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:36:43,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (1/1) ... [2020-12-01 15:36:43,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:36:43,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:36:43,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:36:43,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:36:43,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:36:43,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-01 15:36:43,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:36:43,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:36:43,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:36:48,286 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:36:48,302 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-01 15:36:48,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:36:48 BoogieIcfgContainer [2020-12-01 15:36:48,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:36:48,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:36:48,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:36:48,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:36:48,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:36:43" (1/3) ... [2020-12-01 15:36:48,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f37f4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:36:48, skipping insertion in model container [2020-12-01 15:36:48,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:36:43" (2/3) ... [2020-12-01 15:36:48,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f37f4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:36:48, skipping insertion in model container [2020-12-01 15:36:48,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:36:48" (3/3) ... [2020-12-01 15:36:48,329 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-12-01 15:36:48,357 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:36:48,360 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:36:48,379 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:36:48,416 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:36:48,417 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:36:48,417 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:36:48,417 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:36:48,433 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:36:48,434 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:36:48,434 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:36:48,434 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:36:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-01 15:36:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-01 15:36:48,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:36:48,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-01 15:36:48,476 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:36:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:36:48,482 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-12-01 15:36:48,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 15:36:48,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387967823] [2020-12-01 15:36:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/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 [2020-12-01 15:36:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:36:48,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-01 15:36:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:36:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:36:48,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-01 15:36:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:36:49,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387967823] [2020-12-01 15:36:49,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:36:49,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-01 15:36:49,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584936386] [2020-12-01 15:36:49,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 15:36:49,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-01 15:36:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 15:36:49,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:36:49,045 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-01 15:36:49,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:36:49,063 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-01 15:36:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 15:36:49,065 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-01 15:36:49,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:36:49,075 INFO L225 Difference]: With dead ends: 21 [2020-12-01 15:36:49,075 INFO L226 Difference]: Without dead ends: 8 [2020-12-01 15:36:49,079 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 [2020-12-01 15:36:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-01 15:36:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-01 15:36:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-01 15:36:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-01 15:36:49,119 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-01 15:36:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:36:49,120 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-01 15:36:49,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 15:36:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-01 15:36:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-01 15:36:49,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:36:49,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:36:49,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-01 15:36:49,338 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:36:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:36:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-12-01 15:36:49,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 15:36:49,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709506531] [2020-12-01 15:36:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/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 [2020-12-01 15:36:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:36:50,016 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:36:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:36:50,763 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:36:50,834 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-01 15:36:50,834 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:36:51,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-01 15:36:51,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:36:51 BoogieIcfgContainer [2020-12-01 15:36:51,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:36:51,067 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:36:51,068 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:36:51,068 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:36:51,068 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:36:48" (3/4) ... [2020-12-01 15:36:51,083 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:36:51,131 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e9bfa72c-1437-4112-a88c-7ef965ca614b/bin/uautomizer/witness.graphml [2020-12-01 15:36:51,131 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:36:51,133 INFO L168 Benchmark]: Toolchain (without parser) took 7955.06 ms. Allocated memory is still 73.4 MB. Free memory was 58.7 MB in the beginning and 40.7 MB in the end (delta: 18.0 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:36:51,134 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 73.4 MB. Free memory is still 56.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:36:51,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.66 ms. Allocated memory is still 73.4 MB. Free memory was 58.7 MB in the beginning and 48.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:36:51,136 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.22 ms. Allocated memory is still 73.4 MB. Free memory was 48.5 MB in the beginning and 58.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:36:51,137 INFO L168 Benchmark]: Boogie Preprocessor took 89.49 ms. Allocated memory is still 73.4 MB. Free memory was 58.1 MB in the beginning and 56.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:36:51,138 INFO L168 Benchmark]: RCFGBuilder took 4598.49 ms. Allocated memory is still 73.4 MB. Free memory was 56.8 MB in the beginning and 44.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:36:51,139 INFO L168 Benchmark]: TraceAbstraction took 2759.79 ms. Allocated memory is still 73.4 MB. Free memory was 44.4 MB in the beginning and 42.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:36:51,139 INFO L168 Benchmark]: Witness Printer took 63.88 ms. Allocated memory is still 73.4 MB. Free memory was 42.4 MB in the beginning and 40.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:36:51,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 73.4 MB. Free memory is still 56.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.66 ms. Allocated memory is still 73.4 MB. Free memory was 58.7 MB in the beginning and 48.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 101.22 ms. Allocated memory is still 73.4 MB. Free memory was 48.5 MB in the beginning and 58.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 89.49 ms. Allocated memory is still 73.4 MB. Free memory was 58.1 MB in the beginning and 56.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 4598.49 ms. Allocated memory is still 73.4 MB. Free memory was 56.8 MB in the beginning and 44.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2759.79 ms. Allocated memory is still 73.4 MB. Free memory was 44.4 MB in the beginning and 42.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Witness Printer took 63.88 ms. Allocated memory is still 73.4 MB. Free memory was 42.4 MB in the beginning and 40.7 MB in the end (delta: 1.7 MB). There was no memory consumed. 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: 2.6s, 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, 1.0s 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...