/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/float-benchs/inv_square_int.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:07:09,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:07:09,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:07:09,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:07:09,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:07:09,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:07:09,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:07:09,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:07:09,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:07:09,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:07:09,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:07:09,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:07:09,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:07:09,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:07:09,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:07:09,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:07:09,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:07:09,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:07:09,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:07:09,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:07:09,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:07:09,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:07:09,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:07:09,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:07:09,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:07:09,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:07:09,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:07:09,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:07:09,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:07:09,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:07:09,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:07:09,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:07:09,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:07:09,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:07:09,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:07:09,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:07:09,305 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 06:07:09,332 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:07:09,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:07:09,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:07:09,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:07:09,335 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:07:09,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:07:09,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:07:09,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:07:09,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:07:09,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:07:09,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:07:09,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:07:09,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:07:09,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:07:09,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:07:09,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:07:09,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:07:09,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:07:09,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:07:09,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:07:09,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:07:09,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:07:09,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:07:09,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:07:09,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:07:09,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:07:09,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:07:09,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:07:09,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:07:09,746 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:07:09,746 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:07:09,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square_int.c [2020-12-23 06:07:09,838 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e9908f5d9/6fa9eab527524c6d826a56b8a7d0dd62/FLAG9d6d29d82 [2020-12-23 06:07:10,416 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:07:10,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square_int.c [2020-12-23 06:07:10,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e9908f5d9/6fa9eab527524c6d826a56b8a7d0dd62/FLAG9d6d29d82 [2020-12-23 06:07:10,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e9908f5d9/6fa9eab527524c6d826a56b8a7d0dd62 [2020-12-23 06:07:10,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:07:10,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:07:10,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:07:10,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:07:10,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:07:10,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:07:10" (1/1) ... [2020-12-23 06:07:10,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34dfcebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:10, skipping insertion in model container [2020-12-23 06:07:10,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:07:10" (1/1) ... [2020-12-23 06:07:10,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:07:10,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:07:10,978 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/float-benchs/inv_square_int.c[482,495] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2020-12-23 06:07:10,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:07:11,004 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:07:11,018 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/float-benchs/inv_square_int.c[482,495] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2020-12-23 06:07:11,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:07:11,038 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:07:11,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11 WrapperNode [2020-12-23 06:07:11,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:07:11,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:07:11,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:07:11,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:07:11,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (1/1) ... [2020-12-23 06:07:11,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (1/1) ... [2020-12-23 06:07:11,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:07:11,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:07:11,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:07:11,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:07:11,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (1/1) ... [2020-12-23 06:07:11,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (1/1) ... [2020-12-23 06:07:11,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (1/1) ... [2020-12-23 06:07:11,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (1/1) ... [2020-12-23 06:07:11,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (1/1) ... [2020-12-23 06:07:11,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (1/1) ... [2020-12-23 06:07:11,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (1/1) ... [2020-12-23 06:07:11,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:07:11,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:07:11,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:07:11,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:07:11,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (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 06:07:11,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:07:11,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:07:11,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:07:11,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:07:11,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:07:11,471 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 06:07:11,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:11 BoogieIcfgContainer [2020-12-23 06:07:11,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:07:11,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:07:11,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:07:11,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:07:11,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:07:10" (1/3) ... [2020-12-23 06:07:11,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58216435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:07:11, skipping insertion in model container [2020-12-23 06:07:11,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:11" (2/3) ... [2020-12-23 06:07:11,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58216435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:07:11, skipping insertion in model container [2020-12-23 06:07:11,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:11" (3/3) ... [2020-12-23 06:07:11,481 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-12-23 06:07:11,488 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:07:11,493 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:07:11,514 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:07:11,544 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:07:11,544 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:07:11,544 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:07:11,545 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:07:11,545 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:07:11,545 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:07:11,545 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:07:11,545 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:07:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-23 06:07:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:07:11,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:11,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:07:11,568 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:11,575 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-12-23 06:07:11,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:11,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299924627] [2020-12-23 06:07:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:11,797 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 06:07:11,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299924627] [2020-12-23 06:07:11,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:07:11,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:07:11,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774244908] [2020-12-23 06:07:11,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:07:11,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:11,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:07:11,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:07:11,826 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-23 06:07:11,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:11,843 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-23 06:07:11,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:07:11,845 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 06:07:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:11,854 INFO L225 Difference]: With dead ends: 19 [2020-12-23 06:07:11,854 INFO L226 Difference]: Without dead ends: 7 [2020-12-23 06:07:11,857 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 06:07:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-23 06:07:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-23 06:07:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-23 06:07:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-12-23 06:07:11,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-12-23 06:07:11,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:11,896 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-12-23 06:07:11,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:07:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-12-23 06:07:11,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:07:11,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:11,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:07:11,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:07:11,898 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:11,899 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-12-23 06:07:11,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:11,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330787582] [2020-12-23 06:07:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:07:11,936 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:07:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:07:11,982 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:07:12,016 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:07:12,017 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:07:12,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:07:12,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:07:12 BoogieIcfgContainer [2020-12-23 06:07:12,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:07:12,051 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:07:12,052 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:07:12,052 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:07:12,052 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:11" (3/4) ... [2020-12-23 06:07:12,056 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 06:07:12,056 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:07:12,062 INFO L168 Benchmark]: Toolchain (without parser) took 1277.60 ms. Allocated memory is still 157.3 MB. Free memory was 131.9 MB in the beginning and 124.1 MB in the end (delta: 7.8 MB). Peak memory consumption was 8.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:12,063 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 130.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:07:12,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.88 ms. Allocated memory is still 157.3 MB. Free memory was 131.6 MB in the beginning and 122.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:12,067 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.18 ms. Allocated memory is still 157.3 MB. Free memory was 122.0 MB in the beginning and 120.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:12,069 INFO L168 Benchmark]: Boogie Preprocessor took 21.49 ms. Allocated memory is still 157.3 MB. Free memory was 120.5 MB in the beginning and 119.6 MB in the end (delta: 944.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:12,071 INFO L168 Benchmark]: RCFGBuilder took 372.02 ms. Allocated memory is still 157.3 MB. Free memory was 119.6 MB in the beginning and 108.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:12,072 INFO L168 Benchmark]: TraceAbstraction took 576.21 ms. Allocated memory is still 157.3 MB. Free memory was 108.2 MB in the beginning and 124.6 MB in the end (delta: -16.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:07:12,075 INFO L168 Benchmark]: Witness Printer took 5.24 ms. Allocated memory is still 157.3 MB. Free memory was 124.6 MB in the beginning and 124.1 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:07:12,091 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory is still 130.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.88 ms. Allocated memory is still 157.3 MB. Free memory was 131.6 MB in the beginning and 122.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.18 ms. Allocated memory is still 157.3 MB. Free memory was 122.0 MB in the beginning and 120.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.49 ms. Allocated memory is still 157.3 MB. Free memory was 120.5 MB in the beginning and 119.6 MB in the end (delta: 944.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 372.02 ms. Allocated memory is still 157.3 MB. Free memory was 119.6 MB in the beginning and 108.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 576.21 ms. Allocated memory is still 157.3 MB. Free memory was 108.2 MB in the beginning and 124.6 MB in the end (delta: -16.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 5.24 ms. Allocated memory is still 157.3 MB. Free memory was 124.6 MB in the beginning and 124.1 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: 13]: 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 24, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] int x; [L18] float y, z; [L20] x = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L23] y = x*x - 2.f [L13] COND TRUE !(cond) [L13] 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...