./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2_false-unreach-call.c.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2_false-unreach-call.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac1c2f023046690eb69a7c8f4224e12d57f24d83 ........................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2_false-unreach-call.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac1c2f023046690eb69a7c8f4224e12d57f24d83 ................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 15:16:20,777 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 15:16:20,778 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 15:16:20,787 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 15:16:20,787 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 15:16:20,788 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 15:16:20,789 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 15:16:20,790 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 15:16:20,791 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 15:16:20,791 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 15:16:20,791 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 15:16:20,792 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 15:16:20,792 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 15:16:20,793 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 15:16:20,793 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 15:16:20,793 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 15:16:20,794 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 15:16:20,795 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 15:16:20,796 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 15:16:20,796 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 15:16:20,797 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 15:16:20,798 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 15:16:20,799 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 15:16:20,799 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 15:16:20,799 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 15:16:20,799 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 15:16:20,800 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 15:16:20,800 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 15:16:20,801 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 15:16:20,801 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 15:16:20,802 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 15:16:20,802 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 15:16:20,802 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 15:16:20,802 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 15:16:20,803 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 15:16:20,803 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 15:16:20,803 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 15:16:20,810 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 15:16:20,810 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 15:16:20,811 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 15:16:20,811 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 15:16:20,811 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 15:16:20,811 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 15:16:20,811 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 15:16:20,812 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 15:16:20,812 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 15:16:20,813 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 15:16:20,813 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 15:16:20,813 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 15:16:20,813 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 15:16:20,813 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 15:16:20,813 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 15:16:20,813 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 15:16:20,813 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 15:16:20,813 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 15:16:20,813 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 15:16:20,813 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 15:16:20,814 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac1c2f023046690eb69a7c8f4224e12d57f24d83 [2018-12-01 15:16:20,831 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 15:16:20,840 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 15:16:20,843 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 15:16:20,844 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 15:16:20,844 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 15:16:20,845 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2_false-unreach-call.c.i [2018-12-01 15:16:20,884 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/data/4563dec26/f436c0af818544f19bfe7d0778b8eca4/FLAGa4c2a8f8f [2018-12-01 15:16:21,231 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 15:16:21,232 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/sv-benchmarks/c/loop-floats-scientific-comp/loop2_false-unreach-call.c.i [2018-12-01 15:16:21,236 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/data/4563dec26/f436c0af818544f19bfe7d0778b8eca4/FLAGa4c2a8f8f [2018-12-01 15:16:21,622 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/data/4563dec26/f436c0af818544f19bfe7d0778b8eca4 [2018-12-01 15:16:21,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 15:16:21,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 15:16:21,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 15:16:21,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 15:16:21,627 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 15:16:21,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf0b28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21, skipping insertion in model container [2018-12-01 15:16:21,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 15:16:21,643 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 15:16:21,730 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 15:16:21,732 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 15:16:21,742 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 15:16:21,750 INFO L195 MainTranslator]: Completed translation [2018-12-01 15:16:21,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21 WrapperNode [2018-12-01 15:16:21,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 15:16:21,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 15:16:21,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 15:16:21,751 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 15:16:21,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 15:16:21,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 15:16:21,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 15:16:21,764 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 15:16:21,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (1/1) ... [2018-12-01 15:16:21,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 15:16:21,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 15:16:21,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 15:16:21,777 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 15:16:21,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/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 [2018-12-01 15:16:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 15:16:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 15:16:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 15:16:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 15:16:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 15:16:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 15:16:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-01 15:16:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-01 15:16:21,925 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 15:16:21,926 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-01 15:16:21,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:16:21 BoogieIcfgContainer [2018-12-01 15:16:21,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 15:16:21,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 15:16:21,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 15:16:21,928 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 15:16:21,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:16:21" (1/3) ... [2018-12-01 15:16:21,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a54908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:16:21, skipping insertion in model container [2018-12-01 15:16:21,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:21" (2/3) ... [2018-12-01 15:16:21,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a54908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:16:21, skipping insertion in model container [2018-12-01 15:16:21,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:16:21" (3/3) ... [2018-12-01 15:16:21,931 INFO L112 eAbstractionObserver]: Analyzing ICFG loop2_false-unreach-call.c.i [2018-12-01 15:16:21,936 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 15:16:21,940 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 15:16:21,950 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 15:16:21,967 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 15:16:21,968 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 15:16:21,968 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 15:16:21,968 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 15:16:21,968 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 15:16:21,968 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 15:16:21,968 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 15:16:21,968 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 15:16:21,968 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 15:16:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-12-01 15:16:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-01 15:16:21,982 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 15:16:21,983 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 15:16:21,984 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 15:16:21,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 15:16:21,988 INFO L82 PathProgramCache]: Analyzing trace with hash 23164375, now seen corresponding path program 1 times [2018-12-01 15:16:21,989 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 15:16:21,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 15:16:22,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 15:16:22,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 15:16:22,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 15:16:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 15:16:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 15:16:22,057 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 15:16:22,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-01 15:16:22,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-01 15:16:22,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-01 15:16:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-01 15:16:22,069 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-12-01 15:16:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 15:16:22,080 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-12-01 15:16:22,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-01 15:16:22,081 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-12-01 15:16:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 15:16:22,085 INFO L225 Difference]: With dead ends: 34 [2018-12-01 15:16:22,085 INFO L226 Difference]: Without dead ends: 15 [2018-12-01 15:16:22,087 INFO L631 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 [2018-12-01 15:16:22,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-01 15:16:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-01 15:16:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-01 15:16:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-12-01 15:16:22,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2018-12-01 15:16:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 15:16:22,107 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-12-01 15:16:22,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-01 15:16:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-12-01 15:16:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-01 15:16:22,107 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 15:16:22,108 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 15:16:22,108 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 15:16:22,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 15:16:22,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2126491567, now seen corresponding path program 1 times [2018-12-01 15:16:22,108 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 15:16:22,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 15:16:22,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 15:16:22,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 15:16:22,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 15:16:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 15:16:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 15:16:22,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 15:16:22,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-01 15:16:22,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-01 15:16:22,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-01 15:16:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-01 15:16:22,166 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2018-12-01 15:16:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 15:16:22,177 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-12-01 15:16:22,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-01 15:16:22,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-12-01 15:16:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 15:16:22,178 INFO L225 Difference]: With dead ends: 27 [2018-12-01 15:16:22,178 INFO L226 Difference]: Without dead ends: 18 [2018-12-01 15:16:22,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-01 15:16:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-01 15:16:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-12-01 15:16:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-01 15:16:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-01 15:16:22,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-12-01 15:16:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 15:16:22,181 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-01 15:16:22,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-01 15:16:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-01 15:16:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-01 15:16:22,181 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 15:16:22,182 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 15:16:22,182 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 15:16:22,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 15:16:22,182 INFO L82 PathProgramCache]: Analyzing trace with hash -351484205, now seen corresponding path program 1 times [2018-12-01 15:16:22,182 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 15:16:22,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 15:16:22,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 15:16:22,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 15:16:22,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 15:16:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 15:16:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 15:16:22,205 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-01 15:16:22,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:16:22 BoogieIcfgContainer [2018-12-01 15:16:22,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 15:16:22,220 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 15:16:22,220 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 15:16:22,220 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 15:16:22,220 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:16:21" (3/4) ... [2018-12-01 15:16:22,222 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-01 15:16:22,222 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 15:16:22,223 INFO L168 Benchmark]: Toolchain (without parser) took 598.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 68.2 MB). Free memory was 961.4 MB in the beginning and 1.0 GB in the end (delta: -45.8 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-12-01 15:16:22,224 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 15:16:22,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 125.45 ms. Allocated memory is still 1.0 GB. Free memory was 961.4 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 15:16:22,224 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.41 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 15:16:22,225 INFO L168 Benchmark]: Boogie Preprocessor took 13.22 ms. Allocated memory is still 1.0 GB. Free memory was 950.6 MB in the beginning and 945.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-01 15:16:22,225 INFO L168 Benchmark]: RCFGBuilder took 149.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 68.2 MB). Free memory was 945.3 MB in the beginning and 1.0 GB in the end (delta: -98.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2018-12-01 15:16:22,226 INFO L168 Benchmark]: TraceAbstraction took 293.02 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 36.8 MB). Peak memory consumption was 36.8 MB. Max. memory is 11.5 GB. [2018-12-01 15:16:22,226 INFO L168 Benchmark]: Witness Printer took 2.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 15:16:22,229 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 125.45 ms. Allocated memory is still 1.0 GB. Free memory was 961.4 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.41 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.22 ms. Allocated memory is still 1.0 GB. Free memory was 950.6 MB in the beginning and 945.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 149.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 68.2 MB). Free memory was 945.3 MB in the beginning and 1.0 GB in the end (delta: -98.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 293.02 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 36.8 MB). Peak memory consumption was 36.8 MB. Max. memory is 11.5 GB. * Witness Printer took 2.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 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 44, overapproximation of someBinaryArithmeticFLOAToperation at line 30. Possible FailurePath: [L9] float pi = 3.14159 ; VAL [\old(pi)=2, pi=314159/100000] [L15] float x = __VERIFIER_nondet_float() ; [L16] float octant = pi/3 ; [L18] float oddExp = x ; [L19] float evenExp = 1.0 ; [L20] float term = x ; [L21] unsigned int count = 2 ; [L22] int multFactor = 0 ; [L23] int temp ; VAL [count=2, evenExp=1, multFactor=0, oddExp=3, pi=314159/100000, term=3, x=3] [L25] COND TRUE 1 [L27] term = term * (x/count) VAL [count=2, evenExp=1, multFactor=0, oddExp=3, pi=314159/100000, x=3] [L28] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [(count>>1 % 2 == 0) ? 1 : -1=-1, count=2, evenExp=1, multFactor=0, oddExp=3, pi=314159/100000, x=3] [L28] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L30] evenExp = evenExp + multFactor*term [L32] count++ [L34] term = term * (x/count) [L36] oddExp = oddExp + multFactor*term [L38] count++ [L40] temp = __VERIFIER_nondet_int() [L41] COND TRUE temp == 0 VAL [count=4, multFactor=-1, pi=314159/100000, temp=0, x=3] [L44] CALL __VERIFIER_assert( oddExp >= evenExp ) VAL [\old(cond)=0, pi=314159/100000] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, pi=314159/100000] [L7] __VERIFIER_error() VAL [\old(cond)=0, cond=0, pi=314159/100000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. UNSAFE Result, 0.2s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 37 SDtfs, 1 SDslu, 12 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 529 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-01 15:16:23,552 INFO L170 SettingsManager]: Resetting all preferences to default values... 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[2018-12-01 15:16:23,571 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 15:16:23,571 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 15:16:23,571 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 15:16:23,572 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 15:16:23,572 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 15:16:23,573 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 15:16:23,573 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 15:16:23,573 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 15:16:23,574 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 15:16:23,574 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 15:16:23,574 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 15:16:23,575 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 15:16:23,575 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 15:16:23,575 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-12-01 15:16:23,582 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 15:16:23,582 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 15:16:23,583 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 15:16:23,583 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 15:16:23,583 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 15:16:23,583 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 15:16:23,584 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 15:16:23,584 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 15:16:23,584 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 15:16:23,584 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 15:16:23,584 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 15:16:23,584 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 15:16:23,584 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 15:16:23,585 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 15:16:23,585 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-01 15:16:23,585 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-01 15:16:23,585 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 15:16:23,585 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 15:16:23,585 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 15:16:23,585 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 15:16:23,585 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 15:16:23,586 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 15:16:23,586 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 15:16:23,586 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 15:16:23,586 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 15:16:23,586 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 15:16:23,586 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 15:16:23,586 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 15:16:23,586 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-12-01 15:16:23,587 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 15:16:23,587 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-01 15:16:23,587 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-01 15:16:23,587 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac1c2f023046690eb69a7c8f4224e12d57f24d83 [2018-12-01 15:16:23,606 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 15:16:23,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 15:16:23,616 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 15:16:23,617 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 15:16:23,617 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 15:16:23,618 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2_false-unreach-call.c.i [2018-12-01 15:16:23,653 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/data/2728f6d57/733a449b4be249e2b583f7fbd8d3ed49/FLAGac75f78db [2018-12-01 15:16:23,996 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 15:16:23,997 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/sv-benchmarks/c/loop-floats-scientific-comp/loop2_false-unreach-call.c.i [2018-12-01 15:16:24,000 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/data/2728f6d57/733a449b4be249e2b583f7fbd8d3ed49/FLAGac75f78db [2018-12-01 15:16:24,385 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/data/2728f6d57/733a449b4be249e2b583f7fbd8d3ed49 [2018-12-01 15:16:24,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 15:16:24,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 15:16:24,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 15:16:24,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 15:16:24,391 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 15:16:24,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@504a9c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24, skipping insertion in model container [2018-12-01 15:16:24,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 15:16:24,415 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 15:16:24,507 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 15:16:24,510 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 15:16:24,522 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 15:16:24,530 INFO L195 MainTranslator]: Completed translation [2018-12-01 15:16:24,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24 WrapperNode [2018-12-01 15:16:24,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 15:16:24,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 15:16:24,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 15:16:24,531 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 15:16:24,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 15:16:24,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 15:16:24,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 15:16:24,544 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 15:16:24,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (1/1) ... [2018-12-01 15:16:24,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 15:16:24,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 15:16:24,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 15:16:24,560 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 15:16:24,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/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 [2018-12-01 15:16:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 15:16:24,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 15:16:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 15:16:24,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 15:16:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 15:16:24,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 15:16:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-01 15:16:24,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-01 15:16:28,110 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 15:16:28,110 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-01 15:16:28,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:16:28 BoogieIcfgContainer [2018-12-01 15:16:28,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 15:16:28,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 15:16:28,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 15:16:28,113 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 15:16:28,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:16:24" (1/3) ... [2018-12-01 15:16:28,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da34dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:16:28, skipping insertion in model container [2018-12-01 15:16:28,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:16:24" (2/3) ... [2018-12-01 15:16:28,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da34dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:16:28, skipping insertion in model container [2018-12-01 15:16:28,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:16:28" (3/3) ... [2018-12-01 15:16:28,115 INFO L112 eAbstractionObserver]: Analyzing ICFG loop2_false-unreach-call.c.i [2018-12-01 15:16:28,121 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 15:16:28,125 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 15:16:28,134 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 15:16:28,150 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 15:16:28,151 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 15:16:28,151 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 15:16:28,151 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 15:16:28,151 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 15:16:28,151 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 15:16:28,151 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 15:16:28,151 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 15:16:28,151 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 15:16:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-12-01 15:16:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-01 15:16:28,163 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 15:16:28,164 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 15:16:28,165 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 15:16:28,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 15:16:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash 23164375, now seen corresponding path program 1 times [2018-12-01 15:16:28,170 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-01 15:16:28,171 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/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 [2018-12-01 15:16:28,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 15:16:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 15:16:28,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 15:16:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 15:16:28,246 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 15:16:28,255 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 15:16:28,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-01 15:16:28,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-01 15:16:28,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-01 15:16:28,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-01 15:16:28,268 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-12-01 15:16:28,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 15:16:28,279 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-12-01 15:16:28,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-01 15:16:28,280 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-12-01 15:16:28,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 15:16:28,285 INFO L225 Difference]: With dead ends: 34 [2018-12-01 15:16:28,285 INFO L226 Difference]: Without dead ends: 15 [2018-12-01 15:16:28,287 INFO L631 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 [2018-12-01 15:16:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-01 15:16:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-01 15:16:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-01 15:16:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-12-01 15:16:28,306 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2018-12-01 15:16:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 15:16:28,307 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-12-01 15:16:28,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-01 15:16:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-12-01 15:16:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-01 15:16:28,307 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 15:16:28,307 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 15:16:28,308 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 15:16:28,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 15:16:28,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2126491567, now seen corresponding path program 1 times [2018-12-01 15:16:28,308 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-01 15:16:28,309 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/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 [2018-12-01 15:16:28,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 15:16:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 15:16:28,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 15:16:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 15:16:28,980 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 15:16:28,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 15:16:28,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-01 15:16:28,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-01 15:16:28,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-01 15:16:28,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-01 15:16:28,994 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2018-12-01 15:16:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 15:16:32,067 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-12-01 15:16:32,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-01 15:16:32,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-12-01 15:16:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 15:16:32,068 INFO L225 Difference]: With dead ends: 27 [2018-12-01 15:16:32,068 INFO L226 Difference]: Without dead ends: 18 [2018-12-01 15:16:32,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-01 15:16:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-01 15:16:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-12-01 15:16:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-01 15:16:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-01 15:16:32,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-12-01 15:16:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 15:16:32,072 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-01 15:16:32,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-01 15:16:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-01 15:16:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-01 15:16:32,072 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 15:16:32,072 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 15:16:32,072 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 15:16:32,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 15:16:32,072 INFO L82 PathProgramCache]: Analyzing trace with hash -351484205, now seen corresponding path program 1 times [2018-12-01 15:16:32,073 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-01 15:16:32,073 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/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 [2018-12-01 15:16:32,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 15:16:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 15:16:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 15:16:33,416 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-01 15:16:33,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:16:33 BoogieIcfgContainer [2018-12-01 15:16:33,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 15:16:33,435 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 15:16:33,435 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 15:16:33,435 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 15:16:33,436 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:16:28" (3/4) ... [2018-12-01 15:16:33,437 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-01 15:16:33,464 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_577deb9c-2603-4c74-bd34-0b9f8d91653a/bin-2019/uautomizer/witness.graphml [2018-12-01 15:16:33,464 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 15:16:33,465 INFO L168 Benchmark]: Toolchain (without parser) took 9077.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 943.4 MB in the beginning and 1.0 GB in the end (delta: -104.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. [2018-12-01 15:16:33,466 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 15:16:33,466 INFO L168 Benchmark]: CACSL2BoogieTranslator took 142.51 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 15:16:33,466 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.07 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 15:16:33,467 INFO L168 Benchmark]: Boogie Preprocessor took 15.60 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-01 15:16:33,467 INFO L168 Benchmark]: RCFGBuilder took 3550.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -180.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. [2018-12-01 15:16:33,467 INFO L168 Benchmark]: TraceAbstraction took 5324.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.0 MB). Peak memory consumption was 60.0 MB. Max. memory is 11.5 GB. [2018-12-01 15:16:33,468 INFO L168 Benchmark]: Witness Printer took 29.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 15:16:33,469 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 142.51 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.07 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.60 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 3550.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -180.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5324.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.0 MB). Peak memory consumption was 60.0 MB. Max. memory is 11.5 GB. * Witness Printer took 29.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 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: [L9] float pi = 3.14159 ; VAL [\old(pi)=0.000000000000000000000000000000000000000000001401298464324817, pi=3.141590118408203] [L15] float x = __VERIFIER_nondet_float() ; [L16] float octant = pi/3 ; [L18] float oddExp = x ; [L19] float evenExp = 1.0 ; [L20] float term = x ; [L21] unsigned int count = 2 ; [L22] int multFactor = 0 ; [L23] int temp ; VAL [count=2, evenExp=1.0, multFactor=0, octant=1.0471967458724976, oddExp=0.00000000000000000010842021724855044, pi=3.141590118408203, term=0.00000000000000000010842021724855044, x=0.00000000000000000010842021724855044] [L25] COND TRUE 1 [L27] term = term * (x/count) VAL [count=2, evenExp=1.0, multFactor=0, octant=1.0471967458724976, oddExp=0.00000000000000000010842021724855044, pi=3.141590118408203, term=0.0000000000000000000000000000000000000058774717541114375, x=0.00000000000000000010842021724855044] [L28] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [(count>>1 % 2 == 0) ? 1 : -1=-1, count=2, evenExp=1.0, multFactor=0, octant=1.0471967458724976, oddExp=0.00000000000000000010842021724855044, pi=3.141590118408203, term=0.0000000000000000000000000000000000000058774717541114375, x=0.00000000000000000010842021724855044] [L28] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L30] evenExp = evenExp + multFactor*term [L32] count++ [L34] term = term * (x/count) [L36] oddExp = oddExp + multFactor*term [L38] count++ [L40] temp = __VERIFIER_nondet_int() [L41] COND TRUE temp == 0 VAL [count=4, evenExp=1.0, multFactor=4294967295, octant=1.0471967458724976, oddExp=0.00000000000000000010842021724855044, pi=3.141590118408203, temp=0, term=0.0, x=0.00000000000000000010842021724855044] [L44] CALL __VERIFIER_assert( oddExp >= evenExp ) VAL [\old(cond)=0, pi=3.141590118408203] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, pi=3.141590118408203] [L7] __VERIFIER_error() VAL [\old(cond)=0, cond=0, pi=3.141590118408203] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. UNSAFE Result, 5.2s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 3.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 36 SDtfs, 1 SDslu, 11 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 373 SizeOfPredicates, 1 NumberOfNonLiveVariables, 61 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...