/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/interpolation2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:01:20,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:01:20,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:01:20,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:01:20,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:01:20,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:01:20,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:01:20,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:01:20,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:01:20,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:01:20,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:01:20,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:01:20,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:01:20,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:01:20,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:01:20,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:01:20,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:01:20,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:01:20,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:01:20,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:01:20,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:01:20,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:01:20,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:01:20,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:01:20,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:01:20,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:01:20,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:01:20,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:01:20,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:01:20,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:01:20,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:01:20,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:01:20,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:01:20,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:01:20,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:01:20,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:01:20,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:01:20,377 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:01:20,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:01:20,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:01:20,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:01:20,382 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:01:20,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:01:20,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:01:20,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:01:20,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:01:20,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:01:20,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:01:20,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:01:20,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:01:20,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:01:20,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:01:20,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:01:20,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:01:20,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:01:20,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:01:20,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:01:20,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:01:20,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:01:20,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:01:20,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:01:20,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:01:20,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:01:20,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:01:20,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:01:20,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:01:20,804 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:01:20,805 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:01:20,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation2.c [2021-01-06 16:01:20,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2f75ce3fc/3000432e0d5e4667be5fc571d1889773/FLAG3bdb16e5b [2021-01-06 16:01:21,444 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:01:21,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation2.c [2021-01-06 16:01:21,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2f75ce3fc/3000432e0d5e4667be5fc571d1889773/FLAG3bdb16e5b [2021-01-06 16:01:21,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2f75ce3fc/3000432e0d5e4667be5fc571d1889773 [2021-01-06 16:01:21,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:01:21,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:01:21,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:21,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:01:21,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:01:21,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:21" (1/1) ... [2021-01-06 16:01:21,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72107e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:21, skipping insertion in model container [2021-01-06 16:01:21,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:21" (1/1) ... [2021-01-06 16:01:21,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:01:21,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:01:22,026 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/interpolation2.c[450,463] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2021-01-06 16:01:22,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:22,073 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:01:22,088 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/interpolation2.c[450,463] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2021-01-06 16:01:22,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:22,129 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:01:22,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22 WrapperNode [2021-01-06 16:01:22,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:22,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:22,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:01:22,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:01:22,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (1/1) ... [2021-01-06 16:01:22,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (1/1) ... [2021-01-06 16:01:22,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:22,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:01:22,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:01:22,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:01:22,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (1/1) ... [2021-01-06 16:01:22,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (1/1) ... [2021-01-06 16:01:22,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (1/1) ... [2021-01-06 16:01:22,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (1/1) ... [2021-01-06 16:01:22,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (1/1) ... [2021-01-06 16:01:22,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (1/1) ... [2021-01-06 16:01:22,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (1/1) ... [2021-01-06 16:01:22,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:01:22,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:01:22,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:01:22,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:01:22,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:01:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:01:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:01:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-01-06 16:01:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:01:22,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:01:22,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-01-06 16:01:22,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:01:22,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:01:22,961 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 16:01:23,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:23 BoogieIcfgContainer [2021-01-06 16:01:23,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:01:23,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:01:23,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:01:23,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:01:23,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:01:21" (1/3) ... [2021-01-06 16:01:23,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d15be65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:23, skipping insertion in model container [2021-01-06 16:01:23,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:22" (2/3) ... [2021-01-06 16:01:23,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d15be65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:23, skipping insertion in model container [2021-01-06 16:01:23,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:23" (3/3) ... [2021-01-06 16:01:23,026 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation2.c [2021-01-06 16:01:23,064 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:01:23,076 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:01:23,113 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:01:23,144 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:01:23,145 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:01:23,145 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:01:23,145 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:01:23,145 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:01:23,146 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:01:23,146 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:01:23,146 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:01:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 16:01:23,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:01:23,169 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:23,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:23,170 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1235833265, now seen corresponding path program 1 times [2021-01-06 16:01:23,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:23,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400843325] [2021-01-06 16:01:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:23,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400843325] [2021-01-06 16:01:23,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:23,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:01:23,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962446466] [2021-01-06 16:01:23,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:01:23,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:23,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:01:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:01:23,394 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 16:01:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:23,413 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-01-06 16:01:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:01:23,414 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 16:01:23,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:23,425 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:01:23,425 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:01:23,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:01:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:01:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:01:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:01:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-01-06 16:01:23,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-01-06 16:01:23,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:23,468 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-01-06 16:01:23,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:01:23,468 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-01-06 16:01:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:01:23,469 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:23,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:23,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:01:23,470 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1178902664, now seen corresponding path program 1 times [2021-01-06 16:01:23,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:23,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735019553] [2021-01-06 16:01:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:23,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735019553] [2021-01-06 16:01:23,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:23,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:01:23,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298261256] [2021-01-06 16:01:23,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:01:23,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:23,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:01:23,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:01:23,548 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2021-01-06 16:01:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:23,593 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 16:01:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:01:23,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 16:01:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:23,595 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:01:23,596 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:01:23,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:01:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:01:23,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-01-06 16:01:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:01:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 16:01:23,607 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-01-06 16:01:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:23,608 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 16:01:23,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:01:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 16:01:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:01:23,611 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:23,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:23,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:01:23,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:23,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2110328889, now seen corresponding path program 1 times [2021-01-06 16:01:23,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:23,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630651280] [2021-01-06 16:01:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:23,704 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:23,736 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:23,781 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:01:23,782 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:01:23,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:01:23,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:01:23 BoogieIcfgContainer [2021-01-06 16:01:23,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:01:23,836 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:01:23,836 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:01:23,837 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:01:23,837 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:23" (3/4) ... [2021-01-06 16:01:23,841 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:01:23,841 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:01:23,844 INFO L168 Benchmark]: Toolchain (without parser) took 2034.67 ms. Allocated memory is still 159.4 MB. Free memory was 133.8 MB in the beginning and 111.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:23,845 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 131.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:23,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.83 ms. Allocated memory is still 159.4 MB. Free memory was 133.5 MB in the beginning and 122.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:23,847 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.84 ms. Allocated memory is still 159.4 MB. Free memory was 122.8 MB in the beginning and 121.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:23,848 INFO L168 Benchmark]: Boogie Preprocessor took 72.42 ms. Allocated memory is still 159.4 MB. Free memory was 121.1 MB in the beginning and 119.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:23,849 INFO L168 Benchmark]: RCFGBuilder took 714.03 ms. Allocated memory is still 159.4 MB. Free memory was 119.7 MB in the beginning and 141.3 MB in the end (delta: -21.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:23,850 INFO L168 Benchmark]: TraceAbstraction took 826.29 ms. Allocated memory is still 159.4 MB. Free memory was 140.8 MB in the beginning and 111.4 MB in the end (delta: 29.4 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:23,850 INFO L168 Benchmark]: Witness Printer took 5.13 ms. Allocated memory is still 159.4 MB. Free memory is still 111.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:23,855 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 131.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 320.83 ms. Allocated memory is still 159.4 MB. Free memory was 133.5 MB in the beginning and 122.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 83.84 ms. Allocated memory is still 159.4 MB. Free memory was 122.8 MB in the beginning and 121.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.42 ms. Allocated memory is still 159.4 MB. Free memory was 121.1 MB in the beginning and 119.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 714.03 ms. Allocated memory is still 159.4 MB. Free memory was 119.7 MB in the beginning and 141.3 MB in the end (delta: -21.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 826.29 ms. Allocated memory is still 159.4 MB. Free memory was 140.8 MB in the beginning and 111.4 MB in the end (delta: 29.4 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * Witness Printer took 5.13 ms. Allocated memory is still 159.4 MB. Free memory is still 111.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 28, overapproximation of to_real at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L13] int i; [L14] float z, t; [L15] float min[] = { 5, 10, 12, 30, 150 }; [L16] float max[] = { 10, 12, 30, 150, 300 }; [L17] float org[] = { 1, 5, -10, 30, 20 }; [L18] float slope[] = { 4, -15, 40, -10, 0 }; [L20] t = __VERIFIER_nondet_float() [L21] EXPR min[0] [L21] t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L21] EXPR max[sizeof(max) / sizeof(max[0]) - 1] [L21] t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L7] COND FALSE !(!cond) [L23] i = 0 [L23] COND TRUE i < sizeof(min) / sizeof(min[0]) [L24] EXPR max[i] [L24] COND TRUE t <= max[i] [L26] EXPR org[i] [L26] EXPR slope[i] [L26] EXPR min[i] [L26] EXPR max[i] [L26] EXPR min[i] [L26] z = org[i] + slope[i] * (t - min[i]) / (max[i] - min[i]) [L9] COND TRUE !(cond) [L9] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 32 SDtfs, 6 SDslu, 10 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 180 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...