./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.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_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/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 02e16371708027ec56fdf0402c3e1a5d4f23a0ff .......................................................................................................................................................................................................................................................................................................... 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_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/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 02e16371708027ec56fdf0402c3e1a5d4f23a0ff ................................................................................................................................................................................................................................................................................................................................................................. 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 07:30:02,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:30:02,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:30:02,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:30:02,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:30:02,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:30:02,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:30:02,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:30:02,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:30:02,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:30:02,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:30:02,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:30:02,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:30:02,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:30:02,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:30:02,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:30:02,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:30:02,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:30:02,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:30:02,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:30:02,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:30:02,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:30:02,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:30:02,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:30:02,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:30:02,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:30:02,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:30:02,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:30:02,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:30:02,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:30:02,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:30:02,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:30:02,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:30:02,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:30:02,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:30:02,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:30:02,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:30:02,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:30:02,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:30:02,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:30:02,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:30:02,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:30:02,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:30:02,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:30:03,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:30:03,001 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:30:03,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:30:03,002 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:30:03,002 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:30:03,002 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:30:03,003 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:30:03,003 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:30:03,003 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:30:03,003 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:30:03,004 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:30:03,004 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:30:03,004 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:30:03,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:30:03,005 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:30:03,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:30:03,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:30:03,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:30:03,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:30:03,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:30:03,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:30:03,007 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:30:03,008 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:30:03,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:30:03,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:30:03,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:30:03,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:30:03,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:30:03,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:30:03,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:30:03,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:30:03,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:30:03,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:30:03,011 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:30:03,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:30:03,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:30:03,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:30:03,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:30:03,012 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_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2020-11-28 07:30:03,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:30:03,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:30:03,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:30:03,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:30:03,406 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:30:03,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-28 07:30:03,493 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/data/3c0a09a3f/6f5f4a02d87e4479b57213031c01b0bd/FLAGc7ad369dd [2020-11-28 07:30:04,004 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:30:04,005 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-28 07:30:04,011 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/data/3c0a09a3f/6f5f4a02d87e4479b57213031c01b0bd/FLAGc7ad369dd [2020-11-28 07:30:04,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/data/3c0a09a3f/6f5f4a02d87e4479b57213031c01b0bd [2020-11-28 07:30:04,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:30:04,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:30:04,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:30:04,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:30:04,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:30:04,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de8a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04, skipping insertion in model container [2020-11-28 07:30:04,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:30:04,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:30:04,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:30:04,651 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:30:04,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:30:04,703 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:30:04,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04 WrapperNode [2020-11-28 07:30:04,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:30:04,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:30:04,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:30:04,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:30:04,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:30:04,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:30:04,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:30:04,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:30:04,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (1/1) ... [2020-11-28 07:30:04,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:30:04,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:30:04,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:30:04,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:30:04,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/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 07:30:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:30:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:30:04,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:30:04,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:30:05,412 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:30:05,412 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-28 07:30:05,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:05 BoogieIcfgContainer [2020-11-28 07:30:05,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:30:05,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:30:05,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:30:05,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:30:05,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:30:04" (1/3) ... [2020-11-28 07:30:05,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38818cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:30:05, skipping insertion in model container [2020-11-28 07:30:05,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:04" (2/3) ... [2020-11-28 07:30:05,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38818cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:30:05, skipping insertion in model container [2020-11-28 07:30:05,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:05" (3/3) ... [2020-11-28 07:30:05,423 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-11-28 07:30:05,434 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:30:05,439 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:30:05,453 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:30:05,478 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:30:05,478 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:30:05,479 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:30:05,479 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:30:05,479 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:30:05,479 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:30:05,480 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:30:05,480 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:30:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-11-28 07:30:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:30:05,498 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:05,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:30:05,499 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:05,506 INFO L82 PathProgramCache]: Analyzing trace with hash 82167647, now seen corresponding path program 1 times [2020-11-28 07:30:05,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:05,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460380946] [2020-11-28 07:30:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:05,640 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 07:30:05,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460380946] [2020-11-28 07:30:05,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:05,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:30:05,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687458317] [2020-11-28 07:30:05,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:30:05,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:30:05,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:30:05,663 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 2 states. [2020-11-28 07:30:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:05,677 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-11-28 07:30:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:30:05,679 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-28 07:30:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:05,687 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:30:05,687 INFO L226 Difference]: Without dead ends: 7 [2020-11-28 07:30:05,690 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 07:30:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-28 07:30:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-28 07:30:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 07:30:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-11-28 07:30:05,735 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-11-28 07:30:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:05,736 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-11-28 07:30:05,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:30:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-11-28 07:30:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:30:05,738 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:05,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:30:05,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:30:05,739 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:05,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1748875412, now seen corresponding path program 1 times [2020-11-28 07:30:05,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:05,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172339365] [2020-11-28 07:30:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:30:05,819 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:30:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:30:05,849 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:30:05,871 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:30:05,872 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:30:05,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:30:05,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:30:05 BoogieIcfgContainer [2020-11-28 07:30:05,900 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:30:05,901 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:30:05,901 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:30:05,902 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:30:05,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:05" (3/4) ... [2020-11-28 07:30:05,905 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:30:05,906 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:30:05,908 INFO L168 Benchmark]: Toolchain (without parser) took 1536.81 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 42.0 MB in the beginning and 57.2 MB in the end (delta: -15.2 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:05,909 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 79.7 MB. Free memory was 58.2 MB in the beginning and 58.1 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:30:05,910 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.99 ms. Allocated memory is still 79.7 MB. Free memory was 41.8 MB in the beginning and 56.9 MB in the end (delta: -15.1 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:05,911 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.72 ms. Allocated memory is still 79.7 MB. Free memory was 56.7 MB in the beginning and 55.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:05,914 INFO L168 Benchmark]: Boogie Preprocessor took 62.22 ms. Allocated memory is still 79.7 MB. Free memory was 55.2 MB in the beginning and 54.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:30:05,916 INFO L168 Benchmark]: RCFGBuilder took 588.69 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 54.2 MB in the beginning and 78.6 MB in the end (delta: -24.5 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:05,918 INFO L168 Benchmark]: TraceAbstraction took 484.25 ms. Allocated memory is still 102.8 MB. Free memory was 78.6 MB in the beginning and 57.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:05,919 INFO L168 Benchmark]: Witness Printer took 4.63 ms. Allocated memory is still 102.8 MB. Free memory was 57.7 MB in the beginning and 57.2 MB in the end (delta: 504.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:30:05,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 79.7 MB. Free memory was 58.2 MB in the beginning and 58.1 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 313.99 ms. Allocated memory is still 79.7 MB. Free memory was 41.8 MB in the beginning and 56.9 MB in the end (delta: -15.1 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.72 ms. Allocated memory is still 79.7 MB. Free memory was 56.7 MB in the beginning and 55.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.22 ms. Allocated memory is still 79.7 MB. Free memory was 55.2 MB in the beginning and 54.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 588.69 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 54.2 MB in the beginning and 78.6 MB in the end (delta: -24.5 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 484.25 ms. Allocated memory is still 102.8 MB. Free memory was 78.6 MB in the beginning and 57.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.63 ms. Allocated memory is still 102.8 MB. Free memory was 57.7 MB in the beginning and 57.2 MB in the end (delta: 504.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 49, overapproximation of someBinaryArithmeticFLOAToperation at line 32. Possible FailurePath: [L14] float pi = 3.14159 ; [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=314159/100000] [L30] COND TRUE 1 [L32] term = term * (x/count) [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=314159/100000] [L12] COND TRUE !(cond) VAL [pi=314159/100000] [L7] __assert_fail("0", "loop2-1.c", 7, "reach_error") VAL [pi=314159/100000] - 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 07:30:08,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:30:08,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:30:08,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:30:08,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:30:08,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:30:08,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:30:08,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:30:08,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:30:08,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:30:08,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:30:08,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:30:08,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:30:08,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:30:08,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:30:08,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:30:08,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:30:08,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:30:08,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:30:08,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:30:08,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:30:08,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:30:08,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:30:08,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:30:08,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:30:08,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:30:08,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:30:08,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:30:08,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:30:08,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:30:08,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:30:08,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:30:08,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:30:08,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:30:08,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:30:08,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:30:08,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:30:08,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:30:08,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:30:08,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:30:08,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:30:08,638 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-28 07:30:08,688 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:30:08,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:30:08,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:30:08,690 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:30:08,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:30:08,691 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:30:08,691 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:30:08,691 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:30:08,692 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:30:08,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:30:08,694 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:30:08,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:30:08,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:30:08,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:30:08,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:30:08,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:30:08,696 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:30:08,696 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 07:30:08,696 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 07:30:08,696 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:30:08,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:30:08,697 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:30:08,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:30:08,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:30:08,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 07:30:08,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:30:08,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:30:08,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:30:08,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:30:08,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:30:08,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:30:08,699 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-28 07:30:08,699 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 07:30:08,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:30:08,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:30:08,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:30:08,700 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_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2020-11-28 07:30:09,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:30:09,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:30:09,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:30:09,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:30:09,183 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:30:09,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-28 07:30:09,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/data/ff1f15c79/13cb18f781dc4c6388045dd584cd17d8/FLAG594bd2a49 [2020-11-28 07:30:09,908 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:30:09,908 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-28 07:30:09,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/data/ff1f15c79/13cb18f781dc4c6388045dd584cd17d8/FLAG594bd2a49 [2020-11-28 07:30:10,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/data/ff1f15c79/13cb18f781dc4c6388045dd584cd17d8 [2020-11-28 07:30:10,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:30:10,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:30:10,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:30:10,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:30:10,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:30:10,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c11b3d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10, skipping insertion in model container [2020-11-28 07:30:10,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:30:10,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:30:10,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:30:10,519 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:30:10,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:30:10,558 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:30:10,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10 WrapperNode [2020-11-28 07:30:10,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:30:10,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:30:10,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:30:10,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:30:10,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:30:10,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:30:10,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:30:10,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:30:10,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (1/1) ... [2020-11-28 07:30:10,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:30:10,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:30:10,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:30:10,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:30:10,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/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 07:30:10,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 07:30:10,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:30:10,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:30:10,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:30:16,122 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:30:16,123 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-28 07:30:16,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:16 BoogieIcfgContainer [2020-11-28 07:30:16,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:30:16,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:30:16,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:30:16,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:30:16,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:30:10" (1/3) ... [2020-11-28 07:30:16,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3721163d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:30:16, skipping insertion in model container [2020-11-28 07:30:16,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:10" (2/3) ... [2020-11-28 07:30:16,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3721163d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:30:16, skipping insertion in model container [2020-11-28 07:30:16,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:16" (3/3) ... [2020-11-28 07:30:16,133 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-11-28 07:30:16,144 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:30:16,149 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:30:16,162 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:30:16,190 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:30:16,191 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:30:16,191 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:30:16,191 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:30:16,191 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:30:16,191 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:30:16,191 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:30:16,191 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:30:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-28 07:30:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:30:16,204 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:16,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:16,205 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:16,209 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-11-28 07:30:16,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:30:16,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328919827] [2020-11-28 07:30:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/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 07:30:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:16,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-28 07:30:16,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:16,487 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 07:30:16,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:16,492 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 07:30:16,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328919827] [2020-11-28 07:30:16,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:16,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-28 07:30:16,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381395764] [2020-11-28 07:30:16,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:30:16,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:30:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:30:16,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:30:16,517 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-11-28 07:30:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:16,537 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-11-28 07:30:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:30:16,538 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-28 07:30:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:16,558 INFO L225 Difference]: With dead ends: 30 [2020-11-28 07:30:16,558 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 07:30:16,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 07:30:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 07:30:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-28 07:30:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:30:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-28 07:30:16,597 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-11-28 07:30:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:16,598 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-28 07:30:16,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:30:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-28 07:30:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:30:16,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:16,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:16,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 07:30:16,815 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:16,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-11-28 07:30:16,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:30:16,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639945834] [2020-11-28 07:30:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/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 07:30:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:17,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:30:17,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:17,810 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 07:30:17,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:17,833 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 07:30:17,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639945834] [2020-11-28 07:30:17,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:17,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:30:17,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010704023] [2020-11-28 07:30:17,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:30:17,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:30:17,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:30:17,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:30:17,845 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-11-28 07:30:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:23,280 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-11-28 07:30:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:30:23,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 07:30:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:23,282 INFO L225 Difference]: With dead ends: 24 [2020-11-28 07:30:23,282 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 07:30:23,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:30:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 07:30:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-11-28 07:30:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 07:30:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-28 07:30:23,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-11-28 07:30:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:23,287 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-28 07:30:23,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:30:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-28 07:30:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:30:23,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:23,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:23,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 07:30:23,502 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:23,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:23,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-11-28 07:30:23,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:30:23,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991692152] [2020-11-28 07:30:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-28 07:30:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:30:24,610 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:30:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:30:25,623 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:30:25,731 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-28 07:30:25,731 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:30:25,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-28 07:30:25,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:30:25 BoogieIcfgContainer [2020-11-28 07:30:25,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:30:25,986 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:30:25,987 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:30:25,987 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:30:25,988 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:16" (3/4) ... [2020-11-28 07:30:25,990 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:30:26,050 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b7d43e91-a4da-4e7c-b944-c57cb398bbb9/bin/utaipan/witness.graphml [2020-11-28 07:30:26,051 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:30:26,053 INFO L168 Benchmark]: Toolchain (without parser) took 15770.78 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.7 MB in the beginning and 40.4 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:30:26,054 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 50.3 MB. Free memory was 32.1 MB in the beginning and 32.0 MB in the end (delta: 25.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:30:26,055 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.83 ms. Allocated memory is still 50.3 MB. Free memory was 26.5 MB in the beginning and 31.6 MB in the end (delta: -5.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:26,056 INFO L168 Benchmark]: Boogie Procedure Inliner took 112.11 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 31.6 MB in the beginning and 43.8 MB in the end (delta: -12.2 MB). Peak memory consumption was 2.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:26,057 INFO L168 Benchmark]: Boogie Preprocessor took 55.06 ms. Allocated memory is still 60.8 MB. Free memory was 43.8 MB in the beginning and 42.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:30:26,058 INFO L168 Benchmark]: RCFGBuilder took 5391.48 ms. Allocated memory is still 60.8 MB. Free memory was 42.5 MB in the beginning and 29.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:26,059 INFO L168 Benchmark]: TraceAbstraction took 9859.53 ms. Allocated memory is still 60.8 MB. Free memory was 28.6 MB in the beginning and 42.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:26,060 INFO L168 Benchmark]: Witness Printer took 64.77 ms. Allocated memory is still 60.8 MB. Free memory was 42.5 MB in the beginning and 40.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:26,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 50.3 MB. Free memory was 32.1 MB in the beginning and 32.0 MB in the end (delta: 25.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 276.83 ms. Allocated memory is still 50.3 MB. Free memory was 26.5 MB in the beginning and 31.6 MB in the end (delta: -5.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 112.11 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 31.6 MB in the beginning and 43.8 MB in the end (delta: -12.2 MB). Peak memory consumption was 2.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.06 ms. Allocated memory is still 60.8 MB. Free memory was 43.8 MB in the beginning and 42.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 5391.48 ms. Allocated memory is still 60.8 MB. Free memory was 42.5 MB in the beginning and 29.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9859.53 ms. Allocated memory is still 60.8 MB. Free memory was 28.6 MB in the beginning and 42.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Witness Printer took 64.77 ms. Allocated memory is still 60.8 MB. Free memory was 42.5 MB in the beginning and 40.4 MB in the end (delta: 2.1 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: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] float pi = 3.14159 ; VAL [pi=3.141590118408203] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=3.141590118408203] [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=3.141590118408203] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [pi=3.141590118408203] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=3.141590118408203] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=3.141590118408203] [L12] COND TRUE !(cond) VAL [pi=3.141590118408203] [L7] __assert_fail("0", "loop2-1.c", 7, "reach_error") VAL [pi=3.141590118408203] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 2 SDslu, 7 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 438 SizeOfPredicates, 1 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...