/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/floats-cdfpl/square_7.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:00:13,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:00:13,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:00:13,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:00:13,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:00:13,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:00:13,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:00:13,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:00:13,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:00:13,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:00:13,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:00:13,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:00:13,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:00:13,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:00:13,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:00:13,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:00:13,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:00:13,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:00:13,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:00:13,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:00:13,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:00:13,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:00:13,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:00:13,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:00:14,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:00:14,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:00:14,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:00:14,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:00:14,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:00:14,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:00:14,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:00:14,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:00:14,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:00:14,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:00:14,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:00:14,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:00:14,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:00:14,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:00:14,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:00:14,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:00:14,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:00:14,106 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:00:14,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:00:14,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:00:14,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:00:14,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:00:14,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:00:14,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:00:14,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:00:14,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:00:14,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:00:14,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:00:14,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:00:14,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:00:14,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:00:14,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:00:14,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:00:14,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:00:14,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:00:14,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:00:14,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:00:14,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:00:14,112 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:00:14,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:00:14,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:00:14,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:00:14,531 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:00:14,532 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:00:14,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_7.i [2021-01-06 16:00:14,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e890de3e6/833d0e5e44674da5a0eb582513db6f44/FLAGdb452bbe2 [2021-01-06 16:00:15,285 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:00:15,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_7.i [2021-01-06 16:00:15,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e890de3e6/833d0e5e44674da5a0eb582513db6f44/FLAGdb452bbe2 [2021-01-06 16:00:15,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e890de3e6/833d0e5e44674da5a0eb582513db6f44 [2021-01-06 16:00:15,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:00:15,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:00:15,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:00:15,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:00:15,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:00:15,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:15,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5a59eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15, skipping insertion in model container [2021-01-06 16:00:15,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:15,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:00:15,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:00:15,884 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_7.i[1127,1140] [2021-01-06 16:00:15,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:00:15,899 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:00:15,919 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_7.i[1127,1140] [2021-01-06 16:00:15,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:00:15,938 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:00:15,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15 WrapperNode [2021-01-06 16:00:15,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:00:15,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:00:15,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:00:15,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:00:15,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:15,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:15,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:00:15,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:00:15,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:00:15,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:00:15,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:15,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:15,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:15,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:15,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:16,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:16,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:16,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:00:16,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:00:16,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:00:16,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:00:16,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:00:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:00:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:00:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:00:16,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:00:16,466 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:00:16,467 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-06 16:00:16,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:16 BoogieIcfgContainer [2021-01-06 16:00:16,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:00:16,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:00:16,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:00:16,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:00:16,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:00:15" (1/3) ... [2021-01-06 16:00:16,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c7a1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:00:16, skipping insertion in model container [2021-01-06 16:00:16,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15" (2/3) ... [2021-01-06 16:00:16,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c7a1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:00:16, skipping insertion in model container [2021-01-06 16:00:16,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:16" (3/3) ... [2021-01-06 16:00:16,485 INFO L111 eAbstractionObserver]: Analyzing ICFG square_7.i [2021-01-06 16:00:16,492 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:00:16,498 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:00:16,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:00:16,583 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:00:16,584 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:00:16,584 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:00:16,584 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:00:16,584 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:00:16,584 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:00:16,585 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:00:16,585 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:00:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-01-06 16:00:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:00:16,647 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:16,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:00:16,649 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:16,659 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-01-06 16:00:16,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:16,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166015640] [2021-01-06 16:00:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:16,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166015640] [2021-01-06 16:00:16,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:00:16,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:00:16,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345575355] [2021-01-06 16:00:16,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:00:16,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:16,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:00:16,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:00:16,924 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2021-01-06 16:00:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:16,943 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-01-06 16:00:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:00:16,945 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:00:16,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:16,969 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:00:16,969 INFO L226 Difference]: Without dead ends: 7 [2021-01-06 16:00:16,972 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 [2021-01-06 16:00:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-01-06 16:00:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-01-06 16:00:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-01-06 16:00:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-01-06 16:00:17,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-01-06 16:00:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:17,015 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-01-06 16:00:17,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:00:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-01-06 16:00:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:00:17,016 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:17,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:00:17,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:00:17,018 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:17,021 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-01-06 16:00:17,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:17,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322349667] [2021-01-06 16:00:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:00:17,071 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:00:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:00:17,120 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:00:17,142 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:00:17,142 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:00:17,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:00:17,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:00:17 BoogieIcfgContainer [2021-01-06 16:00:17,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:00:17,169 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:00:17,169 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:00:17,169 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:00:17,170 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:16" (3/4) ... [2021-01-06 16:00:17,174 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:00:17,174 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:00:17,177 INFO L168 Benchmark]: Toolchain (without parser) took 1506.61 ms. Allocated memory is still 157.3 MB. Free memory was 132.9 MB in the beginning and 123.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:17,178 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 131.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:00:17,179 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.71 ms. Allocated memory is still 157.3 MB. Free memory was 132.7 MB in the beginning and 122.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:17,180 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.82 ms. Allocated memory is still 157.3 MB. Free memory was 122.8 MB in the beginning and 121.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:17,181 INFO L168 Benchmark]: Boogie Preprocessor took 23.27 ms. Allocated memory is still 157.3 MB. Free memory was 121.5 MB in the beginning and 120.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:17,182 INFO L168 Benchmark]: RCFGBuilder took 464.19 ms. Allocated memory is still 157.3 MB. Free memory was 120.5 MB in the beginning and 110.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:17,183 INFO L168 Benchmark]: TraceAbstraction took 695.62 ms. Allocated memory is still 157.3 MB. Free memory was 109.6 MB in the beginning and 123.5 MB in the end (delta: -14.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:00:17,183 INFO L168 Benchmark]: Witness Printer took 5.69 ms. Allocated memory is still 157.3 MB. Free memory was 123.5 MB in the beginning and 123.0 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:00:17,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 131.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.71 ms. Allocated memory is still 157.3 MB. Free memory was 132.7 MB in the beginning and 122.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.82 ms. Allocated memory is still 157.3 MB. Free memory was 122.8 MB in the beginning and 121.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.27 ms. Allocated memory is still 157.3 MB. Free memory was 121.5 MB in the beginning and 120.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 464.19 ms. Allocated memory is still 157.3 MB. Free memory was 120.5 MB in the beginning and 110.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 695.62 ms. Allocated memory is still 157.3 MB. Free memory was 109.6 MB in the beginning and 123.5 MB in the end (delta: -14.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 5.69 ms. Allocated memory is still 157.3 MB. Free memory was 123.5 MB in the beginning and 123.0 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 29]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.4f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 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=11occurred 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, 12 NumberOfCodeBlocks, 12 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...