./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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 ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.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 259166f87cdd7847094aaf95c1b6c2506a27351f8fceb58c6f5bc2db5fb43f03 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:04:06,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:04:06,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:04:06,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:04:06,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:04:06,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:04:06,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:04:06,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:04:06,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:04:06,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:04:06,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:04:06,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:04:06,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:04:06,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:04:06,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:04:06,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:04:06,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:04:06,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:04:06,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:04:06,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:04:06,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:04:06,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:04:06,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:04:06,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:04:06,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:04:06,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:04:06,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:04:06,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:04:06,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:04:06,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:04:06,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:04:06,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:04:06,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:04:06,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:04:06,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:04:06,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:04:06,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:04:06,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:04:06,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:04:06,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:04:06,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:04:06,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:04:06,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:04:06,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:04:06,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:04:06,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:04:06,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:04:06,647 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:04:06,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:04:06,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:04:06,648 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:04:06,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:04:06,649 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:04:06,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:04:06,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:04:06,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:04:06,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:04:06,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:04:06,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:04:06,650 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:04:06,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:04:06,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:04:06,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:04:06,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:04:06,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:04:06,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:04:06,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:04:06,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:04:06,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:04:06,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:04:06,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:04:06,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:04:06,652 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:04:06,653 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:04:06,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:04:06,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:04:06,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 259166f87cdd7847094aaf95c1b6c2506a27351f8fceb58c6f5bc2db5fb43f03 [2021-12-21 12:04:06,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:04:06,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:04:06,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:04:06,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:04:06,851 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:04:06,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2021-12-21 12:04:06,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdcddb4cd/8ecf08dc00584cda856fe75a5ffa2c83/FLAG3df6ad75a [2021-12-21 12:04:07,253 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:04:07,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2021-12-21 12:04:07,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdcddb4cd/8ecf08dc00584cda856fe75a5ffa2c83/FLAG3df6ad75a [2021-12-21 12:04:07,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdcddb4cd/8ecf08dc00584cda856fe75a5ffa2c83 [2021-12-21 12:04:07,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:04:07,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:04:07,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:04:07,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:04:07,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:04:07,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5167b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07, skipping insertion in model container [2021-12-21 12:04:07,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:04:07,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:04:07,420 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c[497,510] [2021-12-21 12:04:07,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:04:07,441 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:04:07,450 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c[497,510] [2021-12-21 12:04:07,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:04:07,465 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:04:07,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07 WrapperNode [2021-12-21 12:04:07,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:04:07,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:04:07,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:04:07,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:04:07,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,485 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2021-12-21 12:04:07,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:04:07,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:04:07,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:04:07,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:04:07,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:04:07,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:04:07,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:04:07,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:04:07,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (1/1) ... [2021-12-21 12:04:07,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:04:07,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:04:07,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:04:07,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:04:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:04:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 12:04:07,588 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 12:04:07,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:04:07,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:04:07,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:04:07,631 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:04:07,632 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:04:07,734 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:04:07,741 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:04:07,741 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:04:07,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:07 BoogieIcfgContainer [2021-12-21 12:04:07,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:04:07,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:04:07,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:04:07,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:04:07,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:04:07" (1/3) ... [2021-12-21 12:04:07,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2e6906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:04:07, skipping insertion in model container [2021-12-21 12:04:07,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:07" (2/3) ... [2021-12-21 12:04:07,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2e6906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:04:07, skipping insertion in model container [2021-12-21 12:04:07,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:07" (3/3) ... [2021-12-21 12:04:07,749 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-1.c [2021-12-21 12:04:07,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:04:07,756 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:04:07,798 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:04:07,804 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:04:07,805 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:04:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:04:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 12:04:07,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:04:07,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:04:07,831 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:04:07,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:04:07,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1019803906, now seen corresponding path program 1 times [2021-12-21 12:04:07,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:04:07,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5170393] [2021-12-21 12:04:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:04:07,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:04:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:04:07,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 12:04:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:04:07,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:04:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:04:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:04:08,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:04:08,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5170393] [2021-12-21 12:04:08,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5170393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:04:08,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:04:08,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:04:08,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279171030] [2021-12-21 12:04:08,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:04:08,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:04:08,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:04:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:04:08,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:04:08,060 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:04:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:04:08,072 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-12-21 12:04:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:04:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-12-21 12:04:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:04:08,082 INFO L225 Difference]: With dead ends: 35 [2021-12-21 12:04:08,082 INFO L226 Difference]: Without dead ends: 15 [2021-12-21 12:04:08,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:04:08,088 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:04:08,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:04:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-21 12:04:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-21 12:04:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:04:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-21 12:04:08,119 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 17 [2021-12-21 12:04:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:04:08,119 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-21 12:04:08,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:04:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-21 12:04:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 12:04:08,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:04:08,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:04:08,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:04:08,123 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:04:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:04:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1211444824, now seen corresponding path program 1 times [2021-12-21 12:04:08,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:04:08,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475907085] [2021-12-21 12:04:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:04:08,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:04:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:04:08,155 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 12:04:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:04:08,177 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 12:04:08,177 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 12:04:08,179 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:04:08,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:04:08,183 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-21 12:04:08,184 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:04:08,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:04:08 BoogieIcfgContainer [2021-12-21 12:04:08,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:04:08,210 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:04:08,212 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:04:08,212 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:04:08,212 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:07" (3/4) ... [2021-12-21 12:04:08,215 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 12:04:08,215 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:04:08,215 INFO L158 Benchmark]: Toolchain (without parser) took 928.75ms. Allocated memory was 109.1MB in the beginning and 140.5MB in the end (delta: 31.5MB). Free memory was 81.1MB in the beginning and 79.3MB in the end (delta: 1.8MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. [2021-12-21 12:04:08,216 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory was 66.6MB in the beginning and 66.6MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:04:08,217 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.22ms. Allocated memory was 109.1MB in the beginning and 140.5MB in the end (delta: 31.5MB). Free memory was 80.7MB in the beginning and 116.3MB in the end (delta: -35.7MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2021-12-21 12:04:08,219 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.12ms. Allocated memory is still 140.5MB. Free memory was 116.3MB in the beginning and 115.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:04:08,220 INFO L158 Benchmark]: Boogie Preprocessor took 12.12ms. Allocated memory is still 140.5MB. Free memory was 115.0MB in the beginning and 114.0MB in the end (delta: 988.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:04:08,220 INFO L158 Benchmark]: RCFGBuilder took 244.47ms. Allocated memory is still 140.5MB. Free memory was 114.0MB in the beginning and 104.5MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 12:04:08,223 INFO L158 Benchmark]: TraceAbstraction took 465.65ms. Allocated memory is still 140.5MB. Free memory was 104.5MB in the beginning and 79.9MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-12-21 12:04:08,223 INFO L158 Benchmark]: Witness Printer took 4.66ms. Allocated memory is still 140.5MB. Free memory was 79.9MB in the beginning and 79.3MB in the end (delta: 554.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:04:08,226 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory was 66.6MB in the beginning and 66.6MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.22ms. Allocated memory was 109.1MB in the beginning and 140.5MB in the end (delta: 31.5MB). Free memory was 80.7MB in the beginning and 116.3MB in the end (delta: -35.7MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.12ms. Allocated memory is still 140.5MB. Free memory was 116.3MB in the beginning and 115.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.12ms. Allocated memory is still 140.5MB. Free memory was 115.0MB in the beginning and 114.0MB in the end (delta: 988.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 244.47ms. Allocated memory is still 140.5MB. Free memory was 114.0MB in the beginning and 104.5MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 465.65ms. Allocated memory is still 140.5MB. Free memory was 104.5MB in the beginning and 79.9MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 4.66ms. Allocated memory is still 140.5MB. Free memory was 79.9MB in the beginning and 79.3MB in the end (delta: 554.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 22, overapproximation of someBinaryFLOATComparisonOperation at line 39, overapproximation of someBinaryArithmeticFLOAToperation at line 31. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] CALL assume_abort_if_not(x > -1.0) VAL [\old(cond)=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L21] RET assume_abort_if_not(x > -1.0) [L22] CALL assume_abort_if_not(x < 1.0) VAL [\old(cond)=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L22] RET assume_abort_if_not(x < 1.0) [L23] float exp = 1.0 ; [L24] float term = 1.0 ; [L25] unsigned int count = 1 ; [L26] float result = 2*(1/(1-x)) ; [L27] int temp ; VAL [count=1, exp=1, term=1] [L29] COND TRUE 1 [L31] term = term * (x/count) [L32] exp = exp + term [L33] count++ [L35] temp = __VERIFIER_nondet_int() [L36] COND TRUE temp ==0 VAL [count=2, temp=0] [L39] CALL __VERIFIER_assert( result >= exp ) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 20 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 20 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 0.1s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 4/4 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 [2021-12-21 12:04:08,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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 ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.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 259166f87cdd7847094aaf95c1b6c2506a27351f8fceb58c6f5bc2db5fb43f03 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:04:09,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:04:09,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:04:09,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:04:09,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:04:09,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:04:09,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:04:09,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:04:09,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:04:09,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:04:09,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:04:09,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:04:09,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:04:09,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:04:09,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:04:09,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:04:09,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:04:09,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:04:09,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:04:09,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:04:09,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:04:09,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:04:09,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:04:09,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:04:09,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:04:09,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:04:09,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:04:09,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:04:09,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:04:09,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:04:09,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:04:09,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:04:09,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:04:09,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:04:09,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:04:09,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:04:09,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:04:09,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:04:09,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:04:09,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:04:09,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:04:09,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 12:04:09,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:04:09,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:04:09,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:04:09,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:04:09,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:04:09,957 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:04:09,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:04:09,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:04:09,958 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:04:09,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:04:09,959 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:04:09,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:04:09,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:04:09,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:04:09,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:04:09,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:04:09,960 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 12:04:09,960 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 12:04:09,960 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 12:04:09,960 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:04:09,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:04:09,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:04:09,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:04:09,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:04:09,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:04:09,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:04:09,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:04:09,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:04:09,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:04:09,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:04:09,962 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 12:04:09,962 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 12:04:09,962 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:04:09,963 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:04:09,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:04:09,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:04:09,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 12:04:09,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 259166f87cdd7847094aaf95c1b6c2506a27351f8fceb58c6f5bc2db5fb43f03 [2021-12-21 12:04:10,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:04:10,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:04:10,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:04:10,227 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:04:10,228 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:04:10,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2021-12-21 12:04:10,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c97a754/cac4c46ecd3a4c189c3407f92507717a/FLAGabc78968d [2021-12-21 12:04:10,678 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:04:10,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c [2021-12-21 12:04:10,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c97a754/cac4c46ecd3a4c189c3407f92507717a/FLAGabc78968d [2021-12-21 12:04:10,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c97a754/cac4c46ecd3a4c189c3407f92507717a [2021-12-21 12:04:10,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:04:10,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:04:10,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:04:10,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:04:10,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:04:10,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:10,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14880ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10, skipping insertion in model container [2021-12-21 12:04:10,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:10,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:04:10,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:04:10,841 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c[497,510] [2021-12-21 12:04:10,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:04:10,867 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:04:10,907 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-1.c[497,510] [2021-12-21 12:04:10,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:04:10,933 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:04:10,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10 WrapperNode [2021-12-21 12:04:10,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:04:10,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:04:10,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:04:10,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:04:10,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:10,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:10,970 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2021-12-21 12:04:10,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:04:10,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:04:10,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:04:10,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:04:10,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:10,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:10,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:10,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:10,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:11,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:11,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:11,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:04:11,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:04:11,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:04:11,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:04:11,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (1/1) ... [2021-12-21 12:04:11,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:04:11,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:04:11,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:04:11,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:04:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:04:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 12:04:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 12:04:11,117 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 12:04:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:04:11,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:04:11,170 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:04:11,171 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:04:13,681 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:04:13,685 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:04:13,685 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:04:13,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:13 BoogieIcfgContainer [2021-12-21 12:04:13,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:04:13,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:04:13,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:04:13,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:04:13,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:04:10" (1/3) ... [2021-12-21 12:04:13,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391253e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:04:13, skipping insertion in model container [2021-12-21 12:04:13,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:10" (2/3) ... [2021-12-21 12:04:13,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391253e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:04:13, skipping insertion in model container [2021-12-21 12:04:13,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:13" (3/3) ... [2021-12-21 12:04:13,691 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-1.c [2021-12-21 12:04:13,694 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:04:13,694 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:04:13,743 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:04:13,747 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:04:13,748 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:04:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:04:13,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 12:04:13,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:04:13,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:04:13,761 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:04:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:04:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1019803906, now seen corresponding path program 1 times [2021-12-21 12:04:13,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:04:13,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314723132] [2021-12-21 12:04:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:04:13,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:04:13,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:04:13,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 12:04:13,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 12:04:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:04:14,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 12:04:14,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:04:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:04:14,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:04:14,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 12:04:14,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314723132] [2021-12-21 12:04:14,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314723132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:04:14,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:04:14,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:04:14,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844771297] [2021-12-21 12:04:14,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:04:14,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:04:14,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 12:04:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:04:14,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:04:14,175 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 12:04:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:04:14,186 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-12-21 12:04:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:04:14,187 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-12-21 12:04:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:04:14,191 INFO L225 Difference]: With dead ends: 35 [2021-12-21 12:04:14,192 INFO L226 Difference]: Without dead ends: 15 [2021-12-21 12:04:14,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:04:14,196 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:04:14,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:04:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-21 12:04:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-21 12:04:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:04:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-12-21 12:04:14,218 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 17 [2021-12-21 12:04:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:04:14,218 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-12-21 12:04:14,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 12:04:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-12-21 12:04:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 12:04:14,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:04:14,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:04:14,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:04:14,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:04:14,434 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:04:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:04:14,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1211444824, now seen corresponding path program 1 times [2021-12-21 12:04:14,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:04:14,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450914775] [2021-12-21 12:04:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:04:14,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:04:14,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:04:14,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 12:04:14,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 12:04:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:04:15,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 12:04:15,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:04:40,434 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode .cse3)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1|))) (and (= |c_ULTIMATE.start_main_~exp~0#1| .cse0) (= |c_ULTIMATE.start_main_~term~0#1| .cse0) (= |c_ULTIMATE.start_main_~count~0#1| (_ bv1 32)) (= |c_ULTIMATE.start_main_~result~0#1| (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ bv2 32)) (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (_ bv1 32)))) (fp.div c_currentRoundingMode .cse1 (fp.sub c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~x~0#1|))))) (fp.gt .cse2 (fp.neg .cse3)) (fp.lt .cse2 .cse3) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from false [2021-12-21 12:04:57,280 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~x~0#1| (_ FloatingPoint 8 24))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven |ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (= (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven .cse1))) (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse0 (fp.div roundNearestTiesToEven |ULTIMATE.start_main_~x~0#1| ((_ to_fp_unsigned 8 24) roundNearestTiesToEven (_ bv1 32)))))) |c_ULTIMATE.start_main_~exp~0#1|) (fp.gt .cse2 (fp.neg .cse1)) (= |c_ULTIMATE.start_main_~result~0#1| (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (_ bv2 32)) (let ((.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv1 32)))) (fp.div roundNearestTiesToEven .cse3 (fp.sub roundNearestTiesToEven .cse3 |ULTIMATE.start_main_~x~0#1|))))) (fp.lt .cse2 .cse1)))) is different from false [2021-12-21 12:04:59,323 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~x~0#1| (_ FloatingPoint 8 24))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven |ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (= (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven .cse1))) (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse0 (fp.div roundNearestTiesToEven |ULTIMATE.start_main_~x~0#1| ((_ to_fp_unsigned 8 24) roundNearestTiesToEven (_ bv1 32)))))) |c_ULTIMATE.start_main_~exp~0#1|) (fp.gt .cse2 (fp.neg .cse1)) (= |c_ULTIMATE.start_main_~result~0#1| (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (_ bv2 32)) (let ((.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (_ bv1 32)))) (fp.div roundNearestTiesToEven .cse3 (fp.sub roundNearestTiesToEven .cse3 |ULTIMATE.start_main_~x~0#1|))))) (fp.lt .cse2 .cse1)))) is different from true