/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/loop-floats-scientific-comp/loop1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:12:52,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:12:52,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:12:52,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:12:52,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:12:52,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:12:52,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:12:52,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:12:52,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:12:52,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:12:52,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:12:52,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:12:52,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:12:52,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:12:52,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:12:52,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:12:52,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:12:52,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:12:52,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:12:52,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:12:53,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:12:53,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:12:53,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:12:53,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:12:53,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:12:53,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:12:53,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:12:53,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:12:53,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:12:53,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:12:53,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:12:53,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:12:53,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:12:53,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:12:53,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:12:53,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:12:53,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:12:53,073 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:12:53,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:12:53,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:12:53,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:12:53,079 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:12:53,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:12:53,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:12:53,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:12:53,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:12:53,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:12:53,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:12:53,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:12:53,082 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:12:53,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:12:53,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:12:53,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:12:53,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:12:53,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:12:53,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:12:53,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:12:53,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:12:53,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:12:53,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:12:53,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:12:53,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:12:53,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:12:53,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:12:53,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:12:53,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:12:53,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:12:53,524 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:12:53,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-12-23 06:12:53,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/122df03da/f277dfb23e114f05a967673035544966/FLAG1610ca610 [2020-12-23 06:12:54,240 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:12:54,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-12-23 06:12:54,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/122df03da/f277dfb23e114f05a967673035544966/FLAG1610ca610 [2020-12-23 06:12:54,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/122df03da/f277dfb23e114f05a967673035544966 [2020-12-23 06:12:54,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:12:54,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:12:54,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:12:54,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:12:54,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:12:54,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a5f0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54, skipping insertion in model container [2020-12-23 06:12:54,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:12:54,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:12:54,481 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/loop-floats-scientific-comp/loop1-2.c[538,551] left hand side expression in assignment: lhs: VariableLHS[~term~0,] left hand side expression in assignment: lhs: VariableLHS[~exp~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] [2020-12-23 06:12:54,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:12:54,517 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:12:54,531 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/loop-floats-scientific-comp/loop1-2.c[538,551] left hand side expression in assignment: lhs: VariableLHS[~term~0,] left hand side expression in assignment: lhs: VariableLHS[~exp~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] [2020-12-23 06:12:54,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:12:54,551 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:12:54,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54 WrapperNode [2020-12-23 06:12:54,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:12:54,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:12:54,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:12:54,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:12:54,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:12:54,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:12:54,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:12:54,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:12:54,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (1/1) ... [2020-12-23 06:12:54,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:12:54,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:12:54,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:12:54,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:12:54,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (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 [2020-12-23 06:12:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:12:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:12:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:12:54,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:12:54,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:12:54,965 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:12:54,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:54 BoogieIcfgContainer [2020-12-23 06:12:54,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:12:54,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:12:54,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:12:54,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:12:54,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:12:54" (1/3) ... [2020-12-23 06:12:54,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327032cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:12:54, skipping insertion in model container [2020-12-23 06:12:54,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:54" (2/3) ... [2020-12-23 06:12:54,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327032cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:12:54, skipping insertion in model container [2020-12-23 06:12:54,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:54" (3/3) ... [2020-12-23 06:12:54,977 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-12-23 06:12:54,984 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:12:54,989 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:12:55,069 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:12:55,123 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:12:55,123 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:12:55,123 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:12:55,123 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:12:55,124 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:12:55,124 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:12:55,124 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:12:55,124 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:12:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 06:12:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:12:55,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:55,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:12:55,152 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:55,160 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-12-23 06:12:55,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:55,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644977235] [2020-12-23 06:12:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:12:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:12:55,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644977235] [2020-12-23 06:12:55,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:12:55,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:12:55,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358515066] [2020-12-23 06:12:55,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:12:55,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:12:55,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:12:55,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:12:55,399 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-23 06:12:55,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:12:55,417 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-23 06:12:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:12:55,419 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 06:12:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:12:55,429 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:12:55,429 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 06:12:55,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:12:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 06:12:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 06:12:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 06:12:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 06:12:55,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-23 06:12:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:12:55,473 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 06:12:55,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:12:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 06:12:55,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:12:55,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:55,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:55,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:12:55,475 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:55,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:55,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-12-23 06:12:55,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:55,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195733242] [2020-12-23 06:12:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:12:55,527 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:12:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:12:55,582 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:12:55,619 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:12:55,620 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:12:55,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:12:55,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:12:55 BoogieIcfgContainer [2020-12-23 06:12:55,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:12:55,660 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:12:55,660 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:12:55,660 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:12:55,661 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:54" (3/4) ... [2020-12-23 06:12:55,665 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 06:12:55,665 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:12:55,670 INFO L168 Benchmark]: Toolchain (without parser) took 1396.35 ms. Allocated memory is still 155.2 MB. Free memory was 130.8 MB in the beginning and 118.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:55,672 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 155.2 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:12:55,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.25 ms. Allocated memory is still 155.2 MB. Free memory was 130.6 MB in the beginning and 120.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:55,676 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.08 ms. Allocated memory is still 155.2 MB. Free memory was 120.6 MB in the beginning and 119.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:55,677 INFO L168 Benchmark]: Boogie Preprocessor took 26.21 ms. Allocated memory is still 155.2 MB. Free memory was 119.3 MB in the beginning and 118.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:55,679 INFO L168 Benchmark]: RCFGBuilder took 343.87 ms. Allocated memory is still 155.2 MB. Free memory was 118.3 MB in the beginning and 106.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:55,679 INFO L168 Benchmark]: TraceAbstraction took 689.71 ms. Allocated memory is still 155.2 MB. Free memory was 106.5 MB in the beginning and 119.3 MB in the end (delta: -12.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:12:55,683 INFO L168 Benchmark]: Witness Printer took 5.38 ms. Allocated memory is still 155.2 MB. Free memory was 119.3 MB in the beginning and 118.8 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:55,700 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 155.2 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 279.25 ms. Allocated memory is still 155.2 MB. Free memory was 130.6 MB in the beginning and 120.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.08 ms. Allocated memory is still 155.2 MB. Free memory was 120.6 MB in the beginning and 119.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.21 ms. Allocated memory is still 155.2 MB. Free memory was 119.3 MB in the beginning and 118.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 343.87 ms. Allocated memory is still 155.2 MB. Free memory was 118.3 MB in the beginning and 106.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 689.71 ms. Allocated memory is still 155.2 MB. Free memory was 106.5 MB in the beginning and 119.3 MB in the end (delta: -12.8 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 5.38 ms. Allocated memory is still 155.2 MB. Free memory was 119.3 MB in the beginning and 118.8 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 29. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...