./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_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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 [2020-11-29 21:35:11,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:35:11,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:35:11,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:35:11,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:35:11,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:35:11,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:35:11,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:35:11,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:35:11,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:35:11,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:35:11,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:35:11,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:35:11,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:35:11,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:35:11,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:35:11,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:35:11,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:35:11,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:35:11,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:35:11,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:35:11,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:35:11,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:35:11,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:35:11,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:35:11,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:35:11,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:35:11,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:35:11,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:35:11,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:35:11,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:35:11,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:35:11,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:35:11,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:35:11,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:35:11,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:35:11,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:35:11,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:35:11,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:35:11,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:35:11,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:35:11,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:35:11,685 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:35:11,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:35:11,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:35:11,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:35:11,692 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:35:11,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:35:11,693 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:35:11,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:35:11,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:35:11,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:35:11,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:35:11,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:35:11,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:35:11,696 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:35:11,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:35:11,696 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:35:11,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:35:11,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:35:11,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:35:11,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:35:11,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:35:11,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:35:11,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:35:11,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:35:11,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:35:11,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:35:11,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:35:11,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:35:11,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:35:11,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2020-11-29 21:35:11,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:35:11,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:35:11,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:35:11,980 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:35:11,981 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:35:11,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-29 21:35:12,068 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/data/93e4b9be4/c6b79c7e2d094e7a8d0996601a68c8f4/FLAG806bd58c6 [2020-11-29 21:35:12,495 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:35:12,495 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-29 21:35:12,502 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/data/93e4b9be4/c6b79c7e2d094e7a8d0996601a68c8f4/FLAG806bd58c6 [2020-11-29 21:35:12,901 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/data/93e4b9be4/c6b79c7e2d094e7a8d0996601a68c8f4 [2020-11-29 21:35:12,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:35:12,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:35:12,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:35:12,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:35:12,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:35:12,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:35:12" (1/1) ... [2020-11-29 21:35:12,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e3a9297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:12, skipping insertion in model container [2020-11-29 21:35:12,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:35:12" (1/1) ... [2020-11-29 21:35:12,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:35:12,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:35:13,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:35:13,132 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:35:13,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:35:13,165 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:35:13,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13 WrapperNode [2020-11-29 21:35:13,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:35:13,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:35:13,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:35:13,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:35:13,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (1/1) ... [2020-11-29 21:35:13,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (1/1) ... [2020-11-29 21:35:13,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:35:13,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:35:13,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:35:13,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:35:13,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (1/1) ... [2020-11-29 21:35:13,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (1/1) ... [2020-11-29 21:35:13,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (1/1) ... [2020-11-29 21:35:13,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (1/1) ... [2020-11-29 21:35:13,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (1/1) ... [2020-11-29 21:35:13,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (1/1) ... [2020-11-29 21:35:13,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (1/1) ... [2020-11-29 21:35:13,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:35:13,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:35:13,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:35:13,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:35:13,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:35:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:35:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:35:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:35:13,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:35:13,634 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:35:13,634 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-29 21:35:13,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:35:13 BoogieIcfgContainer [2020-11-29 21:35:13,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:35:13,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:35:13,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:35:13,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:35:13,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:35:12" (1/3) ... [2020-11-29 21:35:13,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a31e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:35:13, skipping insertion in model container [2020-11-29 21:35:13,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:13" (2/3) ... [2020-11-29 21:35:13,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a31e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:35:13, skipping insertion in model container [2020-11-29 21:35:13,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:35:13" (3/3) ... [2020-11-29 21:35:13,661 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-11-29 21:35:13,679 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:35:13,682 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:35:13,719 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:35:13,743 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:35:13,743 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:35:13,743 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:35:13,743 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:35:13,744 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:35:13,744 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:35:13,744 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:35:13,744 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:35:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-29 21:35:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 21:35:13,761 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:35:13,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:35:13,762 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:35:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:35:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-11-29 21:35:13,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:35:13,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895953464] [2020-11-29 21:35:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:35:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:35:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:35:13,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895953464] [2020-11-29 21:35:13,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:35:13,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 21:35:13,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022563831] [2020-11-29 21:35:13,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 21:35:13,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:35:13,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 21:35:13,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:35:13,914 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-11-29 21:35:13,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:35:13,926 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-11-29 21:35:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 21:35:13,927 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-29 21:35:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:35:13,934 INFO L225 Difference]: With dead ends: 30 [2020-11-29 21:35:13,934 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 21:35:13,937 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 [2020-11-29 21:35:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 21:35:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 21:35:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 21:35:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-29 21:35:14,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-11-29 21:35:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:35:14,012 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-29 21:35:14,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 21:35:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-29 21:35:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 21:35:14,013 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:35:14,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:35:14,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:35:14,014 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:35:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:35:14,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-11-29 21:35:14,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:35:14,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839751752] [2020-11-29 21:35:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:35:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:35:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:35:14,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839751752] [2020-11-29 21:35:14,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:35:14,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:35:14,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471888909] [2020-11-29 21:35:14,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:35:14,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:35:14,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:35:14,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:35:14,124 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-11-29 21:35:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:35:14,174 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-11-29 21:35:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:35:14,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-29 21:35:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:35:14,176 INFO L225 Difference]: With dead ends: 23 [2020-11-29 21:35:14,176 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 21:35:14,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:35:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 21:35:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-11-29 21:35:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 21:35:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-29 21:35:14,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-11-29 21:35:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:35:14,181 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-29 21:35:14,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:35:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-29 21:35:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 21:35:14,182 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:35:14,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:35:14,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 21:35:14,182 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:35:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:35:14,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-11-29 21:35:14,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:35:14,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172312785] [2020-11-29 21:35:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:35:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:35:14,210 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:35:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:35:14,237 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:35:14,269 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:35:14,269 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 21:35:14,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 21:35:14,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:35:14 BoogieIcfgContainer [2020-11-29 21:35:14,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:35:14,298 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:35:14,298 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:35:14,298 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:35:14,299 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:35:13" (3/4) ... [2020-11-29 21:35:14,302 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 21:35:14,302 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:35:14,304 INFO L168 Benchmark]: Toolchain (without parser) took 1395.02 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 54.7 MB in the beginning and 75.7 MB in the end (delta: -21.1 MB). Peak memory consumption was 991.5 kB. Max. memory is 16.1 GB. [2020-11-29 21:35:14,304 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:35:14,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.45 ms. Allocated memory is still 86.0 MB. Free memory was 54.5 MB in the beginning and 64.0 MB in the end (delta: -9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:35:14,306 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.34 ms. Allocated memory is still 86.0 MB. Free memory was 64.0 MB in the beginning and 62.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:35:14,307 INFO L168 Benchmark]: Boogie Preprocessor took 23.38 ms. Allocated memory is still 86.0 MB. Free memory was 62.6 MB in the beginning and 61.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:35:14,308 INFO L168 Benchmark]: RCFGBuilder took 410.14 ms. Allocated memory is still 86.0 MB. Free memory was 61.2 MB in the beginning and 49.0 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:35:14,308 INFO L168 Benchmark]: TraceAbstraction took 649.14 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 48.6 MB in the beginning and 76.3 MB in the end (delta: -27.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:35:14,309 INFO L168 Benchmark]: Witness Printer took 3.78 ms. Allocated memory is still 109.1 MB. Free memory was 76.3 MB in the beginning and 75.7 MB in the end (delta: 511.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:35:14,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.45 ms. Allocated memory is still 86.0 MB. Free memory was 54.5 MB in the beginning and 64.0 MB in the end (delta: -9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.34 ms. Allocated memory is still 86.0 MB. Free memory was 64.0 MB in the beginning and 62.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.38 ms. Allocated memory is still 86.0 MB. Free memory was 62.6 MB in the beginning and 61.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 410.14 ms. Allocated memory is still 86.0 MB. Free memory was 61.2 MB in the beginning and 49.0 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 649.14 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 48.6 MB in the beginning and 76.3 MB in the end (delta: -27.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.78 ms. Allocated memory is still 109.1 MB. Free memory was 76.3 MB in the beginning and 75.7 MB in the end (delta: 511.1 kB). Peak memory consumption was 2.1 MB. 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 35. Possible FailurePath: [L14] float pi = 3.14159 ; VAL [pi=314159/100000] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=314159/100000] [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) VAL [pi=314159/100000] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=314159/100000] [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, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 1 SDslu, 8 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 189 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate 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 [2020-11-29 21:35:16,714 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-11-29 21:35:16,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:35:16,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:35:16,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:35:16,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:35:16,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:35:16,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:35:16,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:35:16,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:35:16,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:35:16,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:35:16,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:35:16,858 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 21:35:16,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:35:16,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:35:16,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:35:16,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:35:16,905 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:35:16,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:35:16,906 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:35:16,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:35:16,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:35:16,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:35:16,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:35:16,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:35:16,908 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 21:35:16,908 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 21:35:16,909 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:35:16,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:35:16,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:35:16,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:35:16,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:35:16,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:35:16,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:35:16,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:35:16,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:35:16,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:35:16,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:35:16,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:35:16,911 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 21:35:16,911 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 21:35:16,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:35:16,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:35:16,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 21:35:16,912 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_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2020-11-29 21:35:17,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:35:17,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:35:17,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:35:17,351 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:35:17,352 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:35:17,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-29 21:35:17,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/data/e817f326b/47806e57d57a4839b76c55200c67f470/FLAGc66e76b77 [2020-11-29 21:35:17,927 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:35:17,928 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-11-29 21:35:17,935 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/data/e817f326b/47806e57d57a4839b76c55200c67f470/FLAGc66e76b77 [2020-11-29 21:35:18,340 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/data/e817f326b/47806e57d57a4839b76c55200c67f470 [2020-11-29 21:35:18,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:35:18,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:35:18,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:35:18,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:35:18,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:35:18,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4503c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18, skipping insertion in model container [2020-11-29 21:35:18,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:35:18,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:35:18,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:35:18,603 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:35:18,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:35:18,664 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:35:18,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18 WrapperNode [2020-11-29 21:35:18,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:35:18,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:35:18,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:35:18,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:35:18,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:35:18,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:35:18,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:35:18,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:35:18,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (1/1) ... [2020-11-29 21:35:18,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:35:18,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:35:18,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:35:18,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:35:18,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:35:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 21:35:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:35:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:35:18,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:35:23,642 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:35:23,642 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-29 21:35:23,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:35:23 BoogieIcfgContainer [2020-11-29 21:35:23,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:35:23,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:35:23,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:35:23,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:35:23,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:35:18" (1/3) ... [2020-11-29 21:35:23,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2dbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:35:23, skipping insertion in model container [2020-11-29 21:35:23,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:35:18" (2/3) ... [2020-11-29 21:35:23,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2dbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:35:23, skipping insertion in model container [2020-11-29 21:35:23,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:35:23" (3/3) ... [2020-11-29 21:35:23,650 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-11-29 21:35:23,661 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:35:23,665 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:35:23,677 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:35:23,707 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:35:23,709 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:35:23,709 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:35:23,710 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:35:23,710 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:35:23,710 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:35:23,710 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:35:23,710 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:35:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-29 21:35:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 21:35:23,726 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:35:23,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:35:23,727 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:35:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:35:23,732 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-11-29 21:35:23,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:35:23,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577038934] [2020-11-29 21:35:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-29 21:35:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:35:23,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 21:35:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:35:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:35:24,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:35:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:35:24,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577038934] [2020-11-29 21:35:24,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:35:24,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 21:35:24,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577028974] [2020-11-29 21:35:24,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 21:35:24,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:35:24,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 21:35:24,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:35:24,034 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-11-29 21:35:24,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:35:24,053 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-11-29 21:35:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 21:35:24,054 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-29 21:35:24,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:35:24,096 INFO L225 Difference]: With dead ends: 30 [2020-11-29 21:35:24,097 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 21:35:24,099 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 [2020-11-29 21:35:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 21:35:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 21:35:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 21:35:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-29 21:35:24,130 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-11-29 21:35:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:35:24,130 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-29 21:35:24,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 21:35:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-29 21:35:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 21:35:24,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:35:24,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:35:24,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 21:35:24,347 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:35:24,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:35:24,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-11-29 21:35:24,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:35:24,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203267947] [2020-11-29 21:35:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-29 21:35:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:35:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 21:35:25,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:35:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:35:25,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:35:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:35:25,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203267947] [2020-11-29 21:35:25,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:35:25,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-29 21:35:25,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89568737] [2020-11-29 21:35:25,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:35:25,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:35:25,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:35:25,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:35:25,215 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-11-29 21:35:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:35:30,778 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-11-29 21:35:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:35:30,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 21:35:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:35:30,779 INFO L225 Difference]: With dead ends: 24 [2020-11-29 21:35:30,779 INFO L226 Difference]: Without dead ends: 16 [2020-11-29 21:35:30,780 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 [2020-11-29 21:35:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-29 21:35:30,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-11-29 21:35:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 21:35:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-29 21:35:30,785 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-11-29 21:35:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:35:30,785 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-29 21:35:30,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:35:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-29 21:35:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 21:35:30,786 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:35:30,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:35:30,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 21:35:30,997 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:35:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:35:30,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-11-29 21:35:30,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:35:30,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457374094] [2020-11-29 21:35:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/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 [2020-11-29 21:35:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:35:31,862 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:35:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:35:32,699 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:35:32,792 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 21:35:32,792 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 21:35:32,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 21:35:33,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:35:33 BoogieIcfgContainer [2020-11-29 21:35:33,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:35:33,039 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:35:33,039 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:35:33,040 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:35:33,040 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:35:23" (3/4) ... [2020-11-29 21:35:33,049 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 21:35:33,112 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e4f064d6-85e9-4294-9653-b8fa29fcf8cd/bin/uautomizer/witness.graphml [2020-11-29 21:35:33,112 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:35:33,114 INFO L168 Benchmark]: Toolchain (without parser) took 14767.49 ms. Allocated memory is still 83.9 MB. Free memory was 50.2 MB in the beginning and 38.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2020-11-29 21:35:33,115 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory was 66.6 MB in the beginning and 66.5 MB in the end (delta: 66.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:35:33,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.10 ms. Allocated memory is still 83.9 MB. Free memory was 50.0 MB in the beginning and 67.3 MB in the end (delta: -17.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-29 21:35:33,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.19 ms. Allocated memory is still 83.9 MB. Free memory was 67.3 MB in the beginning and 65.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:35:33,124 INFO L168 Benchmark]: Boogie Preprocessor took 58.11 ms. Allocated memory is still 83.9 MB. Free memory was 65.8 MB in the beginning and 64.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:35:33,125 INFO L168 Benchmark]: RCFGBuilder took 4858.54 ms. Allocated memory is still 83.9 MB. Free memory was 64.3 MB in the beginning and 50.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:35:33,125 INFO L168 Benchmark]: TraceAbstraction took 9393.69 ms. Allocated memory is still 83.9 MB. Free memory was 50.2 MB in the beginning and 40.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:35:33,126 INFO L168 Benchmark]: Witness Printer took 73.33 ms. Allocated memory is still 83.9 MB. Free memory was 40.3 MB in the beginning and 38.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:35:33,128 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory was 66.6 MB in the beginning and 66.5 MB in the end (delta: 66.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.10 ms. Allocated memory is still 83.9 MB. Free memory was 50.0 MB in the beginning and 67.3 MB in the end (delta: -17.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.19 ms. Allocated memory is still 83.9 MB. Free memory was 67.3 MB in the beginning and 65.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.11 ms. Allocated memory is still 83.9 MB. Free memory was 65.8 MB in the beginning and 64.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4858.54 ms. Allocated memory is still 83.9 MB. Free memory was 64.3 MB in the beginning and 50.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9393.69 ms. Allocated memory is still 83.9 MB. Free memory was 50.2 MB in the beginning and 40.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. * Witness Printer took 73.33 ms. Allocated memory is still 83.9 MB. Free memory was 40.3 MB in the beginning and 38.2 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: 9.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 2 SDslu, 7 SDs, 0 SdLazy, 6 SolverSat, 1 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5.0s 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: 0.0s SsaConstructionTime, 1.6s 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...