/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_8.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:00:13,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:00:13,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:00:13,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:00:13,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:00:13,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:00:13,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:00:13,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:00:13,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:00:13,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:00:13,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:00:13,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:00:13,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:00:13,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:00:13,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:00:14,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:00:14,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:00:14,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:00:14,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:00:14,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:00:14,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:00:14,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:00:14,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:00:14,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:00:14,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 16:00:14,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 16:00:14,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 16:00:14,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 16:00:14,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 16:00:14,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 16:00:14,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:00:14,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:00:14,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:00:14,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:00:14,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:00:14,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:00:14,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:00:14,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:00:14,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:00:14,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:00:14,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:00:14,031 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 16:00:14,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:00:14,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:00:14,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:00:14,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:00:14,081 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:00:14,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:00:14,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:00:14,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:00:14,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:00:14,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:00:14,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:00:14,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:00:14,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:00:14,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:00:14,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:00:14,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:00:14,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:00:14,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:00:14,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:00:14,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:00:14,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:00:14,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:00:14,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:00:14,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:00:14,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:00:14,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:00:14,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:00:14,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:00:14,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:00:14,531 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:00:14,532 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:00:14,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_8.i [2021-01-06 16:00:14,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d0b2e8ec7/8b95ee7335f041ce863f9475b620276b/FLAGe63cf4acb [2021-01-06 16:00:15,272 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:00:15,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_8.i [2021-01-06 16:00:15,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d0b2e8ec7/8b95ee7335f041ce863f9475b620276b/FLAGe63cf4acb [2021-01-06 16:00:15,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d0b2e8ec7/8b95ee7335f041ce863f9475b620276b [2021-01-06 16:00:15,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:00:15,616 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:00:15,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:00:15,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:00:15,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:00:15,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:15,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a31638f 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 16:00:15,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:00:15" (1/1) ... [2021-01-06 16:00:15,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:00:15,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:00:15,816 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_8.i[1127,1140] [2021-01-06 16:00:15,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:00:15,832 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:00:15,851 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_8.i[1127,1140] [2021-01-06 16:00:15,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:00:15,868 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:00:15,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:15 WrapperNode [2021-01-06 16:00:15,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:00:15,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:00:15,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:00:15,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:00:15,879 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 16:00:15,887 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 16:00:15,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:00:15,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:00:15,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:00:15,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:00:15,916 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 16:00:15,916 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 16:00:15,917 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 16:00:15,918 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 16:00:15,922 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 16:00:15,925 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 16:00:15,926 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 16:00:15,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:00:15,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:00:15,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:00:15,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:00:15,930 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 16:00:16,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:00:16,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:00:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:00:16,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:00:16,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:00:16,320 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-06 16:00:16,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:16 BoogieIcfgContainer [2021-01-06 16:00:16,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:00:16,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:00:16,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:00:16,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:00:16,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:00:15" (1/3) ... [2021-01-06 16:00:16,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e50825 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 16:00:16,330 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 16:00:16,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e50825 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 16:00:16,331 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 16:00:16,333 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8.i [2021-01-06 16:00:16,341 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:00:16,346 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:00:16,368 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:00:16,401 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:00:16,401 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:00:16,401 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:00:16,401 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:00:16,402 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:00:16,402 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:00:16,402 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:00:16,402 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:00:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-01-06 16:00:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:00:16,426 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:16,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:00:16,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:16,435 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-01-06 16:00:16,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:16,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634007533] [2021-01-06 16:00:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:16,627 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 16:00:16,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634007533] [2021-01-06 16:00:16,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:00:16,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:00:16,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788423022] [2021-01-06 16:00:16,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:00:16,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:16,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:00:16,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:00:16,655 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2021-01-06 16:00:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:16,674 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-01-06 16:00:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:00:16,676 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:00:16,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:16,692 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:00:16,692 INFO L226 Difference]: Without dead ends: 7 [2021-01-06 16:00:16,695 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 16:00:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-01-06 16:00:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-01-06 16:00:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-01-06 16:00:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-01-06 16:00:16,735 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-01-06 16:00:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:16,736 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-01-06 16:00:16,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:00:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-01-06 16:00:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:00:16,737 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:16,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:00:16,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:00:16,739 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:16,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:16,742 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-01-06 16:00:16,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:16,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312372275] [2021-01-06 16:00:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:00:16,798 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:00:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:00:16,838 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:00:16,860 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:00:16,861 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:00:16,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:00:16,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:00:16 BoogieIcfgContainer [2021-01-06 16:00:16,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:00:16,933 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:00:16,933 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:00:16,936 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:00:16,937 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 16:00:16,945 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:00:16,945 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:00:16,965 INFO L168 Benchmark]: Toolchain (without parser) took 1330.38 ms. Allocated memory is still 153.1 MB. Free memory was 129.2 MB in the beginning and 135.4 MB in the end (delta: -6.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:00:16,968 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:00:16,970 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.23 ms. Allocated memory is still 153.1 MB. Free memory was 128.8 MB in the beginning and 119.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:16,976 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.90 ms. Allocated memory is still 153.1 MB. Free memory was 119.3 MB in the beginning and 117.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:16,977 INFO L168 Benchmark]: Boogie Preprocessor took 21.49 ms. Allocated memory is still 153.1 MB. Free memory was 117.7 MB in the beginning and 116.8 MB in the end (delta: 944.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:16,977 INFO L168 Benchmark]: RCFGBuilder took 393.93 ms. Allocated memory is still 153.1 MB. Free memory was 116.8 MB in the beginning and 106.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:16,978 INFO L168 Benchmark]: TraceAbstraction took 607.73 ms. Allocated memory is still 153.1 MB. Free memory was 105.8 MB in the beginning and 135.7 MB in the end (delta: -29.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:00:16,979 INFO L168 Benchmark]: Witness Printer took 12.29 ms. Allocated memory is still 153.1 MB. Free memory was 135.7 MB in the beginning and 135.4 MB in the end (delta: 240.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:00:16,992 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 250.23 ms. Allocated memory is still 153.1 MB. Free memory was 128.8 MB in the beginning and 119.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.90 ms. Allocated memory is still 153.1 MB. Free memory was 119.3 MB in the beginning and 117.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.49 ms. Allocated memory is still 153.1 MB. Free memory was 117.7 MB in the beginning and 116.8 MB in the end (delta: 944.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 393.93 ms. Allocated memory is still 153.1 MB. Free memory was 116.8 MB in the beginning and 106.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 607.73 ms. Allocated memory is still 153.1 MB. Free memory was 105.8 MB in the beginning and 135.7 MB in the end (delta: -29.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. * Witness Printer took 12.29 ms. Allocated memory is still 153.1 MB. Free memory was 135.7 MB in the beginning and 135.4 MB in the end (delta: 240.7 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 < 1.5f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, 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...