/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/loop2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:12:54,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:12:54,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:12:54,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:12:54,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:12:54,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:12:54,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:12:54,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:12:54,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:12:54,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:12:54,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:12:54,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:12:54,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:12:54,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:12:54,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:12:54,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:12:54,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:12:54,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:12:54,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:12:54,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:12:54,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:12:54,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:12:54,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:12:54,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:12:54,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:12:54,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:12:54,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:12:54,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:12:54,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:12:54,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:12:54,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:12:54,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:12:54,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:12:54,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:12:54,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:12:54,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:12:54,399 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 06:12:54,452 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:12:54,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:12:54,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:12:54,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:12:54,458 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:12:54,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:12:54,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:12:54,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:12:54,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:12:54,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:12:54,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:12:54,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:12:54,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:12:54,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:12:54,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:12:54,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:12:54,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:12:54,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:12:54,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:12:54,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:12:54,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:12:54,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:12:54,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:12:54,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:12:54,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:12:54,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:12:54,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:12:54,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:12:54,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:12:54,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:12:54,939 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:12:54,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-12-23 06:12:55,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95f84aa2c/704d99a6ddbd4812a34c7ded4c213fe0/FLAG4f61e798d [2020-12-23 06:12:55,711 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:12:55,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-12-23 06:12:55,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95f84aa2c/704d99a6ddbd4812a34c7ded4c213fe0/FLAG4f61e798d [2020-12-23 06:12:56,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95f84aa2c/704d99a6ddbd4812a34c7ded4c213fe0 [2020-12-23 06:12:56,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:12:56,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:12:56,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:12:56,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:12:56,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:12:56,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20167092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56, skipping insertion in model container [2020-12-23 06:12:56,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:12:56,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:12:56,326 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/loop2-1.c[474,487] left hand side expression in assignment: lhs: VariableLHS[~term~0,] left hand side expression in assignment: lhs: VariableLHS[~multFactor~0,] left hand side expression in assignment: lhs: VariableLHS[~evenExp~0,] left hand side expression in assignment: lhs: VariableLHS[~term~0,] left hand side expression in assignment: lhs: VariableLHS[~oddExp~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] [2020-12-23 06:12:56,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:12:56,381 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:12:56,401 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/loop2-1.c[474,487] left hand side expression in assignment: lhs: VariableLHS[~term~0,] left hand side expression in assignment: lhs: VariableLHS[~multFactor~0,] left hand side expression in assignment: lhs: VariableLHS[~evenExp~0,] left hand side expression in assignment: lhs: VariableLHS[~term~0,] left hand side expression in assignment: lhs: VariableLHS[~oddExp~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] [2020-12-23 06:12:56,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:12:56,446 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:12:56,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56 WrapperNode [2020-12-23 06:12:56,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:12:56,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:12:56,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:12:56,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:12:56,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:12:56,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:12:56,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:12:56,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:12:56,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (1/1) ... [2020-12-23 06:12:56,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:12:56,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:12:56,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:12:56,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:12:56,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (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 06:12:56,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:12:56,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:12:56,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:12:56,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:12:56,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:12:56,986 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 06:12:56,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:56 BoogieIcfgContainer [2020-12-23 06:12:56,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:12:56,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:12:56,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:12:57,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:12:57,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:12:56" (1/3) ... [2020-12-23 06:12:57,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e140b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:12:57, skipping insertion in model container [2020-12-23 06:12:57,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:56" (2/3) ... [2020-12-23 06:12:57,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e140b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:12:57, skipping insertion in model container [2020-12-23 06:12:57,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:56" (3/3) ... [2020-12-23 06:12:57,028 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-12-23 06:12:57,046 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:12:57,057 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:12:57,101 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:12:57,164 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:12:57,165 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:12:57,165 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:12:57,165 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:12:57,165 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:12:57,165 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:12:57,166 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:12:57,166 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:12:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 06:12:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:12:57,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:57,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:57,222 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:57,230 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-12-23 06:12:57,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:57,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105186748] [2020-12-23 06:12:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:12:57,424 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 06:12:57,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105186748] [2020-12-23 06:12:57,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:12:57,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:12:57,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255344610] [2020-12-23 06:12:57,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:12:57,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:12:57,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:12:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:12:57,455 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-23 06:12:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:12:57,474 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-12-23 06:12:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:12:57,476 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 06:12:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:12:57,486 INFO L225 Difference]: With dead ends: 29 [2020-12-23 06:12:57,486 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:12:57,490 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 06:12:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:12:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:12:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:12:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 06:12:57,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-23 06:12:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:12:57,532 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 06:12:57,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:12:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 06:12:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:12:57,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:57,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:57,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:12:57,534 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:57,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:57,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-12-23 06:12:57,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:57,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163283241] [2020-12-23 06:12:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:12:57,703 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 06:12:57,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163283241] [2020-12-23 06:12:57,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:12:57,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:12:57,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50079689] [2020-12-23 06:12:57,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:12:57,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:12:57,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:12:57,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:12:57,708 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-12-23 06:12:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:12:57,736 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-12-23 06:12:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:12:57,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-23 06:12:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:12:57,739 INFO L225 Difference]: With dead ends: 23 [2020-12-23 06:12:57,739 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:12:57,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:12:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:12:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-23 06:12:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:12:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-23 06:12:57,745 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-23 06:12:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:12:57,746 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-23 06:12:57,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:12:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-23 06:12:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:12:57,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:57,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:57,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:12:57,748 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-12-23 06:12:57,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:57,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289525714] [2020-12-23 06:12:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:12:57,796 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:12:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:12:57,850 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:12:57,892 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:12:57,892 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:12:57,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:12:57,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:12:57 BoogieIcfgContainer [2020-12-23 06:12:57,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:12:57,929 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:12:57,929 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:12:57,929 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:12:57,930 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:56" (3/4) ... [2020-12-23 06:12:57,934 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 06:12:57,934 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:12:57,936 INFO L168 Benchmark]: Toolchain (without parser) took 1858.35 ms. Allocated memory is still 172.0 MB. Free memory was 146.8 MB in the beginning and 124.1 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:57,937 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 172.0 MB. Free memory is still 143.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:12:57,938 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.36 ms. Allocated memory is still 172.0 MB. Free memory was 146.5 MB in the beginning and 136.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:57,939 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.83 ms. Allocated memory is still 172.0 MB. Free memory was 136.4 MB in the beginning and 134.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:57,940 INFO L168 Benchmark]: Boogie Preprocessor took 54.12 ms. Allocated memory is still 172.0 MB. Free memory was 134.9 MB in the beginning and 133.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:57,941 INFO L168 Benchmark]: RCFGBuilder took 436.46 ms. Allocated memory is still 172.0 MB. Free memory was 133.8 MB in the beginning and 153.4 MB in the end (delta: -19.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:57,942 INFO L168 Benchmark]: TraceAbstraction took 929.07 ms. Allocated memory is still 172.0 MB. Free memory was 153.4 MB in the beginning and 124.1 MB in the end (delta: 29.2 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:12:57,943 INFO L168 Benchmark]: Witness Printer took 5.28 ms. Allocated memory is still 172.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:12:57,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 172.0 MB. Free memory is still 143.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 368.36 ms. Allocated memory is still 172.0 MB. Free memory was 146.5 MB in the beginning and 136.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.83 ms. Allocated memory is still 172.0 MB. Free memory was 136.4 MB in the beginning and 134.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.12 ms. Allocated memory is still 172.0 MB. Free memory was 134.9 MB in the beginning and 133.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 436.46 ms. Allocated memory is still 172.0 MB. Free memory was 133.8 MB in the beginning and 153.4 MB in the end (delta: -19.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 929.07 ms. Allocated memory is still 172.0 MB. Free memory was 153.4 MB in the beginning and 124.1 MB in the end (delta: 29.2 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * Witness Printer took 5.28 ms. Allocated memory is still 172.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: 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 49, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L14] float pi = 3.14159 ; VAL [pi=314159/100000] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=314159/100000] [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=314159/100000] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [pi=314159/100000] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=314159/100000] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=314159/100000] [L12] COND TRUE !(cond) VAL [pi=314159/100000] [L12] reach_error() VAL [pi=314159/100000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 1 SDslu, 8 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 189 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...