./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2880296f 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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.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 a0e23aa9bbb10ea2680f8206f9d74b19166b1199 .................................................................................................................................................................................................................................................................................... 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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.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 a0e23aa9bbb10ea2680f8206f9d74b19166b1199 .......................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-2880296 [2020-12-02 16:22:34,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 16:22:34,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 16:22:34,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 16:22:34,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 16:22:34,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 16:22:34,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 16:22:34,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 16:22:34,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 16:22:34,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 16:22:34,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 16:22:34,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 16:22:34,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 16:22:34,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 16:22:34,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 16:22:34,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 16:22:34,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 16:22:34,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 16:22:34,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 16:22:34,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 16:22:34,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 16:22:34,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 16:22:34,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 16:22:34,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 16:22:34,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 16:22:34,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 16:22:34,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 16:22:34,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 16:22:34,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 16:22:34,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 16:22:34,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 16:22:34,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 16:22:34,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 16:22:34,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 16:22:34,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 16:22:34,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 16:22:34,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 16:22:34,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 16:22:34,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 16:22:34,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 16:22:34,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 16:22:34,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 16:22:34,731 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 16:22:34,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 16:22:34,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 16:22:34,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 16:22:34,735 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 16:22:34,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 16:22:34,735 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 16:22:34,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 16:22:34,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 16:22:34,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 16:22:34,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 16:22:34,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 16:22:34,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 16:22:34,738 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 16:22:34,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 16:22:34,738 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 16:22:34,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 16:22:34,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 16:22:34,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 16:22:34,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 16:22:34,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 16:22:34,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 16:22:34,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 16:22:34,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 16:22:34,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 16:22:34,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 16:22:34,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 16:22:34,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 16:22:34,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 16:22:34,741 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-12-02 16:22:35,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 16:22:35,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 16:22:35,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 16:22:35,213 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 16:22:35,214 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 16:22:35,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-12-02 16:22:35,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d29c1b5/6667854b866d49cda8fea19e92b81019/FLAG9c66751fe [2020-12-02 16:22:35,925 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 16:22:35,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-12-02 16:22:35,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d29c1b5/6667854b866d49cda8fea19e92b81019/FLAG9c66751fe [2020-12-02 16:22:35,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d29c1b5/6667854b866d49cda8fea19e92b81019 [2020-12-02 16:22:35,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 16:22:35,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 16:22:35,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 16:22:35,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 16:22:35,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 16:22:35,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:22:35" (1/1) ... [2020-12-02 16:22:35,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5ab966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:35, skipping insertion in model container [2020-12-02 16:22:35,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:22:35" (1/1) ... [2020-12-02 16:22:35,985 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 16:22:36,005 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 16:22:36,244 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-02 16:22:36,263 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:22:36,274 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 16:22:36,296 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-02 16:22:36,301 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:22:36,321 INFO L217 MainTranslator]: Completed translation [2020-12-02 16:22:36,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36 WrapperNode [2020-12-02 16:22:36,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 16:22:36,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 16:22:36,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 16:22:36,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 16:22:36,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (1/1) ... [2020-12-02 16:22:36,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (1/1) ... [2020-12-02 16:22:36,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 16:22:36,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 16:22:36,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 16:22:36,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 16:22:36,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (1/1) ... [2020-12-02 16:22:36,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (1/1) ... [2020-12-02 16:22:36,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (1/1) ... [2020-12-02 16:22:36,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (1/1) ... [2020-12-02 16:22:36,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (1/1) ... [2020-12-02 16:22:36,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (1/1) ... [2020-12-02 16:22:36,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (1/1) ... [2020-12-02 16:22:36,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 16:22:36,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 16:22:36,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 16:22:36,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 16:22:36,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (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 [2020-12-02 16:22:36,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 16:22:36,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 16:22:36,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 16:22:36,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 16:22:36,842 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 16:22:36,842 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-02 16:22:36,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:22:36 BoogieIcfgContainer [2020-12-02 16:22:36,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 16:22:36,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 16:22:36,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 16:22:36,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 16:22:36,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:22:35" (1/3) ... [2020-12-02 16:22:36,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb8e572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:22:36, skipping insertion in model container [2020-12-02 16:22:36,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:36" (2/3) ... [2020-12-02 16:22:36,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb8e572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:22:36, skipping insertion in model container [2020-12-02 16:22:36,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:22:36" (3/3) ... [2020-12-02 16:22:36,856 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-12-02 16:22:36,874 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 16:22:36,878 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 16:22:36,893 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 16:22:36,928 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 16:22:36,929 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 16:22:36,929 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 16:22:36,929 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 16:22:36,929 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 16:22:36,930 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 16:22:36,930 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 16:22:36,930 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 16:22:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-02 16:22:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 16:22:36,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:22:36,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 16:22:36,971 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:22:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:22:36,986 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-12-02 16:22:37,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:22:37,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69936546] [2020-12-02 16:22:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:22:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:22:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:22:37,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69936546] [2020-12-02 16:22:37,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:22:37,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 16:22:37,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174517446] [2020-12-02 16:22:37,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 16:22:37,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 16:22:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 16:22:37,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:22:37,191 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-02 16:22:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:22:37,209 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-02 16:22:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 16:22:37,211 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-02 16:22:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:22:37,220 INFO L225 Difference]: With dead ends: 20 [2020-12-02 16:22:37,221 INFO L226 Difference]: Without dead ends: 8 [2020-12-02 16:22:37,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:22:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-02 16:22:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-02 16:22:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-02 16:22:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-02 16:22:37,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-02 16:22:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:22:37,269 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-02 16:22:37,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 16:22:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-02 16:22:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-02 16:22:37,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:22:37,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:22:37,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 16:22:37,270 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:22:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:22:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-12-02 16:22:37,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:22:37,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967184319] [2020-12-02 16:22:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:22:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:22:37,309 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:22:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:22:37,330 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:22:37,353 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 16:22:37,354 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 16:22:37,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 16:22:37,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:22:37 BoogieIcfgContainer [2020-12-02 16:22:37,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 16:22:37,383 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 16:22:37,383 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 16:22:37,383 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 16:22:37,384 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:22:36" (3/4) ... [2020-12-02 16:22:37,388 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 16:22:37,388 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 16:22:37,391 INFO L168 Benchmark]: Toolchain (without parser) took 1426.88 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.2 MB in the beginning and 32.0 MB in the end (delta: -10.8 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:37,392 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 44.0 MB. Free memory was 29.3 MB in the beginning and 29.2 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:22:37,393 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.50 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 22.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:37,394 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.21 ms. Allocated memory is still 44.0 MB. Free memory was 22.2 MB in the beginning and 20.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:37,394 INFO L168 Benchmark]: Boogie Preprocessor took 26.76 ms. Allocated memory is still 44.0 MB. Free memory was 20.8 MB in the beginning and 19.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:22:37,396 INFO L168 Benchmark]: RCFGBuilder took 449.25 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.7 MB in the beginning and 38.4 MB in the end (delta: -18.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:37,396 INFO L168 Benchmark]: TraceAbstraction took 535.08 ms. Allocated memory is still 54.5 MB. Free memory was 38.2 MB in the beginning and 32.5 MB in the end (delta: 5.7 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:37,397 INFO L168 Benchmark]: Witness Printer took 5.20 ms. Allocated memory is still 54.5 MB. Free memory was 32.5 MB in the beginning and 32.0 MB in the end (delta: 501.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:22:37,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 44.0 MB. Free memory was 29.3 MB in the beginning and 29.2 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 357.50 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 22.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.21 ms. Allocated memory is still 44.0 MB. Free memory was 22.2 MB in the beginning and 20.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.76 ms. Allocated memory is still 44.0 MB. Free memory was 20.8 MB in the beginning and 19.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 449.25 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.7 MB in the beginning and 38.4 MB in the end (delta: -18.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 535.08 ms. Allocated memory is still 54.5 MB. Free memory was 38.2 MB in the beginning and 32.5 MB in the end (delta: 5.7 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Witness Printer took 5.20 ms. Allocated memory is still 54.5 MB. Free memory was 32.5 MB in the beginning and 32.0 MB in the end (delta: 501.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 29, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 37. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-2880296 [2020-12-02 16:22:40,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 16:22:40,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 16:22:40,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 16:22:40,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 16:22:40,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 16:22:40,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 16:22:40,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 16:22:40,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 16:22:40,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 16:22:40,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 16:22:40,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 16:22:40,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 16:22:40,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 16:22:40,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 16:22:40,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 16:22:40,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 16:22:40,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 16:22:40,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 16:22:40,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 16:22:40,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 16:22:40,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 16:22:40,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 16:22:40,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 16:22:40,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 16:22:40,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 16:22:40,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 16:22:40,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 16:22:40,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 16:22:40,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 16:22:40,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 16:22:40,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 16:22:40,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 16:22:40,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 16:22:40,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 16:22:40,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 16:22:40,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 16:22:40,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 16:22:40,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 16:22:40,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 16:22:40,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 16:22:40,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 16:22:40,268 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 16:22:40,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 16:22:40,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 16:22:40,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 16:22:40,271 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 16:22:40,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 16:22:40,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 16:22:40,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 16:22:40,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 16:22:40,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 16:22:40,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 16:22:40,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 16:22:40,272 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 16:22:40,273 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 16:22:40,273 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 16:22:40,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 16:22:40,273 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 16:22:40,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 16:22:40,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 16:22:40,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 16:22:40,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 16:22:40,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 16:22:40,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 16:22:40,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 16:22:40,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 16:22:40,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 16:22:40,275 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 16:22:40,275 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 16:22:40,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 16:22:40,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 16:22:40,276 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 16:22:40,276 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-12-02 16:22:40,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 16:22:40,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 16:22:40,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 16:22:40,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 16:22:40,731 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 16:22:40,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-12-02 16:22:40,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401b762fd/816eb2b11b5348628a5c72a9a3adf398/FLAG3dd15deba [2020-12-02 16:22:41,437 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 16:22:41,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-12-02 16:22:41,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401b762fd/816eb2b11b5348628a5c72a9a3adf398/FLAG3dd15deba [2020-12-02 16:22:41,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/401b762fd/816eb2b11b5348628a5c72a9a3adf398 [2020-12-02 16:22:41,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 16:22:41,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 16:22:41,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 16:22:41,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 16:22:41,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 16:22:41,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:22:41" (1/1) ... [2020-12-02 16:22:41,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e827f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:41, skipping insertion in model container [2020-12-02 16:22:41,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:22:41" (1/1) ... [2020-12-02 16:22:41,840 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 16:22:41,895 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 16:22:42,048 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-02 16:22:42,071 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:22:42,088 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 16:22:42,111 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-02 16:22:42,118 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:22:42,144 INFO L217 MainTranslator]: Completed translation [2020-12-02 16:22:42,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42 WrapperNode [2020-12-02 16:22:42,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 16:22:42,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 16:22:42,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 16:22:42,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 16:22:42,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (1/1) ... [2020-12-02 16:22:42,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (1/1) ... [2020-12-02 16:22:42,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 16:22:42,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 16:22:42,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 16:22:42,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 16:22:42,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (1/1) ... [2020-12-02 16:22:42,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (1/1) ... [2020-12-02 16:22:42,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (1/1) ... [2020-12-02 16:22:42,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (1/1) ... [2020-12-02 16:22:42,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (1/1) ... [2020-12-02 16:22:42,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (1/1) ... [2020-12-02 16:22:42,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (1/1) ... [2020-12-02 16:22:42,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 16:22:42,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 16:22:42,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 16:22:42,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 16:22:42,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (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 [2020-12-02 16:22:42,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-12-02 16:22:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 16:22:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 16:22:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 16:22:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 16:22:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-12-02 16:22:46,741 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 16:22:46,742 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-02 16:22:46,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:22:46 BoogieIcfgContainer [2020-12-02 16:22:46,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 16:22:46,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 16:22:46,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 16:22:46,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 16:22:46,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:22:41" (1/3) ... [2020-12-02 16:22:46,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438c47fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:22:46, skipping insertion in model container [2020-12-02 16:22:46,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:22:42" (2/3) ... [2020-12-02 16:22:46,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438c47fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:22:46, skipping insertion in model container [2020-12-02 16:22:46,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:22:46" (3/3) ... [2020-12-02 16:22:46,753 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-12-02 16:22:46,769 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 16:22:46,774 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 16:22:46,788 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 16:22:46,818 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 16:22:46,818 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 16:22:46,818 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 16:22:46,818 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 16:22:46,818 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 16:22:46,818 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 16:22:46,819 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 16:22:46,819 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 16:22:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-02 16:22:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 16:22:46,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:22:46,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 16:22:46,841 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:22:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:22:46,848 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-12-02 16:22:46,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:22:46,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222111644] [2020-12-02 16:22:46,861 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 [2020-12-02 16:22:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:22:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-02 16:22:47,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:22:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:22:47,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:22:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:22:47,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222111644] [2020-12-02 16:22:47,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:22:47,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-02 16:22:47,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162142005] [2020-12-02 16:22:47,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 16:22:47,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:22:47,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 16:22:47,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:22:47,292 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-02 16:22:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:22:47,309 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-02 16:22:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 16:22:47,311 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-02 16:22:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:22:47,320 INFO L225 Difference]: With dead ends: 20 [2020-12-02 16:22:47,320 INFO L226 Difference]: Without dead ends: 8 [2020-12-02 16:22:47,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:22:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-02 16:22:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-02 16:22:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-02 16:22:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-02 16:22:47,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-02 16:22:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:22:47,360 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-02 16:22:47,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 16:22:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-02 16:22:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-02 16:22:47,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:22:47,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:22:47,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 16:22:47,578 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:22:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:22:47,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-12-02 16:22:47,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:22:47,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510857896] [2020-12-02 16:22:47,581 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 [2020-12-02 16:22:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:22:48,565 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:22:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:22:49,322 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:22:49,416 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-02 16:22:49,416 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 16:22:49,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 16:22:49,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:22:49 BoogieIcfgContainer [2020-12-02 16:22:49,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 16:22:49,649 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 16:22:49,649 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 16:22:49,650 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 16:22:49,651 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:22:46" (3/4) ... [2020-12-02 16:22:49,653 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-02 16:22:49,721 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 16:22:49,724 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 16:22:49,728 INFO L168 Benchmark]: Toolchain (without parser) took 7938.85 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.1 MB in the beginning and 31.9 MB in the end (delta: -10.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:49,730 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 44.0 MB. Free memory was 30.2 MB in the beginning and 30.2 MB in the end (delta: 16.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:22:49,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.99 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.9 MB in the beginning and 37.6 MB in the end (delta: -16.7 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:49,732 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.54 ms. Allocated memory is still 54.5 MB. Free memory was 37.6 MB in the beginning and 36.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:49,733 INFO L168 Benchmark]: Boogie Preprocessor took 35.52 ms. Allocated memory is still 54.5 MB. Free memory was 36.0 MB in the beginning and 34.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:49,735 INFO L168 Benchmark]: RCFGBuilder took 4515.60 ms. Allocated memory is still 54.5 MB. Free memory was 34.7 MB in the beginning and 32.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:49,739 INFO L168 Benchmark]: TraceAbstraction took 2903.11 ms. Allocated memory is still 54.5 MB. Free memory was 32.1 MB in the beginning and 33.7 MB in the end (delta: -1.6 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:49,740 INFO L168 Benchmark]: Witness Printer took 74.95 ms. Allocated memory is still 54.5 MB. Free memory was 33.7 MB in the beginning and 31.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:49,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 44.0 MB. Free memory was 30.2 MB in the beginning and 30.2 MB in the end (delta: 16.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 355.99 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.9 MB in the beginning and 37.6 MB in the end (delta: -16.7 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.54 ms. Allocated memory is still 54.5 MB. Free memory was 37.6 MB in the beginning and 36.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.52 ms. Allocated memory is still 54.5 MB. Free memory was 36.0 MB in the beginning and 34.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4515.60 ms. Allocated memory is still 54.5 MB. Free memory was 34.7 MB in the beginning and 32.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2903.11 ms. Allocated memory is still 54.5 MB. Free memory was 32.1 MB in the beginning and 33.7 MB in the end (delta: -1.6 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * Witness Printer took 74.95 ms. Allocated memory is still 54.5 MB. Free memory was 33.7 MB in the beginning and 31.9 MB in the end (delta: 1.8 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] EXPR 1.0 [L21] float exp = 1.0 ; [L22] EXPR 1.0 [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] EXPR 1-x [L24] EXPR 1/(1-x) [L24] EXPR 2*(1/(1-x)) [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] EXPR x/count [L29] EXPR term * (x/count) [L29] term = term * (x/count) [L30] EXPR exp + term [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 36 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...