./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 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 0.1.25-9a8b2e8 [2020-10-20 00:40:37,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:37,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:37,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:37,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:37,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:37,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:37,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:37,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:37,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:37,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:37,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:37,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:37,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:37,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:37,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:37,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:37,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:37,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:37,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:37,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:37,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:37,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:37,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:37,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:37,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:37,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:37,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:37,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:37,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:37,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:37,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:37,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:37,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:37,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:37,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:37,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:37,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:37,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:37,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:37,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:37,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:40:37,725 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:37,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:37,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:37,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:37,727 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:37,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:37,734 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:37,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:40:37,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:37,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:37,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:37,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:37,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:37,736 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:37,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:37,736 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:37,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:37,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:37,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:37,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:37,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:37,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:37,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:37,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:37,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:37,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:40:37,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:40:37,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:37,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:37,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 [2020-10-20 00:40:37,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:37,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:37,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:37,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:37,973 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:37,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-10-20 00:40:38,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f10504f/fe3d9f08725e4fc78c4b594ab2be6c2f/FLAGce4044401 [2020-10-20 00:40:38,479 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:38,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-10-20 00:40:38,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f10504f/fe3d9f08725e4fc78c4b594ab2be6c2f/FLAGce4044401 [2020-10-20 00:40:38,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f10504f/fe3d9f08725e4fc78c4b594ab2be6c2f [2020-10-20 00:40:38,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:38,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:38,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:38,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:38,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:38,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:38" (1/1) ... [2020-10-20 00:40:38,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f65094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:38, skipping insertion in model container [2020-10-20 00:40:38,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:38" (1/1) ... [2020-10-20 00:40:38,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:38,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:39,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:39,210 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:39,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:39,267 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:39,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39 WrapperNode [2020-10-20 00:40:39,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:39,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:39,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:39,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:39,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:39,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:39,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:39,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:39,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... [2020-10-20 00:40:39,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:39,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:39,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:39,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:39,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:40:39,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:40:39,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:39,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:39,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:39,631 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:39,631 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-20 00:40:39,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:39 BoogieIcfgContainer [2020-10-20 00:40:39,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:39,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:39,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:39,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:39,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:38" (1/3) ... [2020-10-20 00:40:39,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307a9d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:39, skipping insertion in model container [2020-10-20 00:40:39,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:39" (2/3) ... [2020-10-20 00:40:39,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307a9d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:39, skipping insertion in model container [2020-10-20 00:40:39,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:39" (3/3) ... [2020-10-20 00:40:39,643 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-10-20 00:40:39,654 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:39,662 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:39,683 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:39,727 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:39,727 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:39,728 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:39,728 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:39,728 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:39,728 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:39,729 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:39,729 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-20 00:40:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:40:39,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:39,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:39,758 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:39,765 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-10-20 00:40:39,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:39,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357934273] [2020-10-20 00:40:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:39,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357934273] [2020-10-20 00:40:39,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:39,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:40:39,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029765391] [2020-10-20 00:40:39,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:39,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:39,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:39,941 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-20 00:40:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:39,959 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-10-20 00:40:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:39,960 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 00:40:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:39,974 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:40:39,975 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:40:39,978 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 [2020-10-20 00:40:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:40:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 00:40:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 00:40:40,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-20 00:40:40,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-10-20 00:40:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:40,014 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-20 00:40:40,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-20 00:40:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:40,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:40,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:40,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:40:40,016 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:40,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-10-20 00:40:40,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:40,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922464882] [2020-10-20 00:40:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:40,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922464882] [2020-10-20 00:40:40,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:40,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:40:40,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453788486] [2020-10-20 00:40:40,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:40:40,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:40,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:40:40,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:40:40,102 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-20 00:40:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:40,128 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-20 00:40:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:40:40,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-20 00:40:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:40,130 INFO L225 Difference]: With dead ends: 23 [2020-10-20 00:40:40,130 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 00:40:40,131 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 [2020-10-20 00:40:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 00:40:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-20 00:40:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 00:40:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-20 00:40:40,136 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-20 00:40:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:40,137 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-20 00:40:40,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:40:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-20 00:40:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:40,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:40,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:40,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:40:40,139 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:40,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:40,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-10-20 00:40:40,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:40,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658244507] [2020-10-20 00:40:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:40,166 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:40,193 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:40,218 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:40:40,219 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:40:40,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:40:40,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:40 BoogieIcfgContainer [2020-10-20 00:40:40,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:40,265 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:40,266 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:40,271 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:40,272 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:39" (3/4) ... [2020-10-20 00:40:40,275 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:40:40,275 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:40,278 INFO L168 Benchmark]: Toolchain (without parser) took 1423.22 ms. Allocated memory was 39.3 MB in the beginning and 48.2 MB in the end (delta: 8.9 MB). Free memory was 14.5 MB in the beginning and 31.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 11.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:40,280 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 38.8 MB. Free memory was 18.1 MB in the beginning and 18.1 MB in the end (delta: 47.3 kB). Peak memory consumption was 47.3 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:40,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 404.10 ms. Allocated memory was 39.3 MB in the beginning and 44.6 MB in the end (delta: 5.2 MB). Free memory was 13.6 MB in the beginning and 28.3 MB in the end (delta: -14.7 MB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:40,282 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.51 ms. Allocated memory is still 44.6 MB. Free memory was 28.3 MB in the beginning and 26.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:40,283 INFO L168 Benchmark]: Boogie Preprocessor took 24.08 ms. Allocated memory is still 44.6 MB. Free memory was 26.6 MB in the beginning and 25.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:40,284 INFO L168 Benchmark]: RCFGBuilder took 306.44 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 25.1 MB in the beginning and 25.3 MB in the end (delta: -226.1 kB). Peak memory consumption was 13.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:40,285 INFO L168 Benchmark]: TraceAbstraction took 630.56 ms. Allocated memory is still 46.7 MB. Free memory was 24.9 MB in the beginning and 10.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:40,286 INFO L168 Benchmark]: Witness Printer took 10.17 ms. Allocated memory was 46.7 MB in the beginning and 48.2 MB in the end (delta: 1.6 MB). Free memory was 10.2 MB in the beginning and 31.1 MB in the end (delta: -20.9 MB). Peak memory consumption was 66.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:40,292 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 38.8 MB. Free memory was 18.1 MB in the beginning and 18.1 MB in the end (delta: 47.3 kB). Peak memory consumption was 47.3 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 404.10 ms. Allocated memory was 39.3 MB in the beginning and 44.6 MB in the end (delta: 5.2 MB). Free memory was 13.6 MB in the beginning and 28.3 MB in the end (delta: -14.7 MB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 33.51 ms. Allocated memory is still 44.6 MB. Free memory was 28.3 MB in the beginning and 26.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 24.08 ms. Allocated memory is still 44.6 MB. Free memory was 26.6 MB in the beginning and 25.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 306.44 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 25.1 MB in the beginning and 25.3 MB in the end (delta: -226.1 kB). Peak memory consumption was 13.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 630.56 ms. Allocated memory is still 46.7 MB. Free memory was 24.9 MB in the beginning and 10.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 14.3 GB. * Witness Printer took 10.17 ms. Allocated memory was 46.7 MB in the beginning and 48.2 MB in the end (delta: 1.6 MB). Free memory was 10.2 MB in the beginning and 31.1 MB in the end (delta: -20.9 MB). Peak memory consumption was 66.7 kB. Max. memory is 14.3 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: 0.4s, 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 0.1.25-9a8b2e8 [2020-10-20 00:40:42,525 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-10-20 00:40:42,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:42,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:42,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:42,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:42,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:42,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:42,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:42,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:42,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:42,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:42,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:42,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:40:42,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:42,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:42,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:42,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:42,616 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:42,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:42,617 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:42,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:42,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:42,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:42,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:42,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:42,618 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:40:42,619 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:40:42,619 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:42,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:42,619 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:42,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:42,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:42,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:42,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:42,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:42,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:42,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:42,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:42,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:42,622 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:40:42,623 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:40:42,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:42,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:42,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:40:42,624 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 [2020-10-20 00:40:42,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:42,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:42,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:42,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:42,847 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:42,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-10-20 00:40:42,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b9bb2f3e/75182617fd2c49fdbd53dd04614183cf/FLAG7d2989f27 [2020-10-20 00:40:43,313 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:43,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-10-20 00:40:43,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b9bb2f3e/75182617fd2c49fdbd53dd04614183cf/FLAG7d2989f27 [2020-10-20 00:40:43,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b9bb2f3e/75182617fd2c49fdbd53dd04614183cf [2020-10-20 00:40:43,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:43,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:43,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:43,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:43,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:43,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:43" (1/1) ... [2020-10-20 00:40:43,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c6d4adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:43, skipping insertion in model container [2020-10-20 00:40:43,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:43" (1/1) ... [2020-10-20 00:40:43,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:43,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:44,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:44,117 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:44,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:44,193 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:44,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44 WrapperNode [2020-10-20 00:40:44,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:44,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:44,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:44,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:44,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (1/1) ... [2020-10-20 00:40:44,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (1/1) ... [2020-10-20 00:40:44,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:44,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:44,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:44,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:44,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (1/1) ... [2020-10-20 00:40:44,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (1/1) ... [2020-10-20 00:40:44,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (1/1) ... [2020-10-20 00:40:44,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (1/1) ... [2020-10-20 00:40:44,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (1/1) ... [2020-10-20 00:40:44,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (1/1) ... [2020-10-20 00:40:44,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (1/1) ... [2020-10-20 00:40:44,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:44,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:44,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:44,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:44,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:40:44,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:40:44,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:44,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:44,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:49,203 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:49,203 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-20 00:40:49,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:49 BoogieIcfgContainer [2020-10-20 00:40:49,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:49,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:49,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:49,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:49,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:43" (1/3) ... [2020-10-20 00:40:49,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39161e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:49, skipping insertion in model container [2020-10-20 00:40:49,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:44" (2/3) ... [2020-10-20 00:40:49,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39161e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:49, skipping insertion in model container [2020-10-20 00:40:49,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:49" (3/3) ... [2020-10-20 00:40:49,215 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-10-20 00:40:49,227 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:49,234 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:49,248 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:49,280 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:49,280 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:49,280 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:49,281 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:49,281 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:49,281 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:49,282 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:49,282 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-20 00:40:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:40:49,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:49,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:49,302 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:49,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:49,307 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-10-20 00:40:49,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:49,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566906511] [2020-10-20 00:40:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:40:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:49,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:40:49,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:49,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:49,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566906511] [2020-10-20 00:40:49,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:49,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:40:49,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967774499] [2020-10-20 00:40:49,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:49,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:49,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:49,534 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-20 00:40:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:49,549 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-10-20 00:40:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:49,551 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 00:40:49,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:49,561 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:40:49,562 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:40:49,565 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 [2020-10-20 00:40:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:40:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 00:40:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 00:40:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-20 00:40:49,612 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-10-20 00:40:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:49,613 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-20 00:40:49,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-20 00:40:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:49,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:49,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:49,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:40:49,830 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:49,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:49,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-10-20 00:40:49,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:49,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748466648] [2020-10-20 00:40:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:40:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 00:40:50,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:50,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:50,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748466648] [2020-10-20 00:40:50,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:50,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 00:40:50,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313678656] [2020-10-20 00:40:50,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:50,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:50,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:50,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:50,623 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-10-20 00:40:55,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:55,576 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-20 00:40:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:55,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:40:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:55,578 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:40:55,578 INFO L226 Difference]: Without dead ends: 16 [2020-10-20 00:40:55,579 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 [2020-10-20 00:40:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-20 00:40:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-20 00:40:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 00:40:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-20 00:40:55,584 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-20 00:40:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:55,585 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-20 00:40:55,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-20 00:40:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:55,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:55,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:55,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:40:55,793 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:55,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-10-20 00:40:55,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:55,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462240755] [2020-10-20 00:40:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:40:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:56,673 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:57,511 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:57,634 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-20 00:40:57,635 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:40:57,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:40:57,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:57 BoogieIcfgContainer [2020-10-20 00:40:57,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:57,887 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:57,887 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:57,888 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:57,889 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:49" (3/4) ... [2020-10-20 00:40:57,897 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:40:57,963 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:40:57,964 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:57,967 INFO L168 Benchmark]: Toolchain (without parser) took 14268.45 ms. Allocated memory was 36.2 MB in the beginning and 48.8 MB in the end (delta: 12.6 MB). Free memory was 12.6 MB in the beginning and 19.8 MB in the end (delta: -7.2 MB). Peak memory consumption was 5.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:57,967 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 34.1 MB. Free memory was 16.0 MB in the beginning and 15.9 MB in the end (delta: 35.0 kB). Peak memory consumption was 35.0 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:57,968 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.89 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 11.7 MB in the beginning and 19.9 MB in the end (delta: -8.3 MB). Peak memory consumption was 7.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:57,969 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.25 ms. Allocated memory is still 45.1 MB. Free memory was 19.8 MB in the beginning and 18.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:57,970 INFO L168 Benchmark]: Boogie Preprocessor took 32.60 ms. Allocated memory is still 45.1 MB. Free memory was 18.0 MB in the beginning and 16.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:57,971 INFO L168 Benchmark]: RCFGBuilder took 4931.95 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 16.4 MB in the beginning and 15.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:57,971 INFO L168 Benchmark]: TraceAbstraction took 8679.82 ms. Allocated memory was 47.2 MB in the beginning and 48.8 MB in the end (delta: 1.6 MB). Free memory was 14.8 MB in the beginning and 22.4 MB in the end (delta: -7.6 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:40:57,972 INFO L168 Benchmark]: Witness Printer took 76.76 ms. Allocated memory is still 48.8 MB. Free memory was 22.4 MB in the beginning and 19.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:57,977 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 34.1 MB. Free memory was 16.0 MB in the beginning and 15.9 MB in the end (delta: 35.0 kB). Peak memory consumption was 35.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 490.89 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 11.7 MB in the beginning and 19.9 MB in the end (delta: -8.3 MB). Peak memory consumption was 7.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 44.25 ms. Allocated memory is still 45.1 MB. Free memory was 19.8 MB in the beginning and 18.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 32.60 ms. Allocated memory is still 45.1 MB. Free memory was 18.0 MB in the beginning and 16.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 4931.95 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 16.4 MB in the beginning and 15.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 8679.82 ms. Allocated memory was 47.2 MB in the beginning and 48.8 MB in the end (delta: 1.6 MB). Free memory was 14.8 MB in the beginning and 22.4 MB in the end (delta: -7.6 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 76.76 ms. Allocated memory is still 48.8 MB. Free memory was 22.4 MB in the beginning and 19.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 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: 8.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 4.9s, 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, 4.3s 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, 1.5s 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...