/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.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:01:17,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:01:17,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:01:17,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:01:17,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:01:17,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:01:17,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:01:17,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:01:17,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:01:17,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:01:17,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:01:17,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:01:17,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:01:17,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:01:17,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:01:17,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:01:17,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:01:17,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:01:17,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:01:17,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:01:17,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:01:17,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:01:17,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:01:17,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:01:17,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:01:17,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:01:17,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:01:17,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:01:17,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:01:17,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:01:17,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:01:17,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:01:17,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:01:17,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:01:17,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:01:17,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:01:17,904 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 16:01:17,962 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:01:17,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:01:17,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:01:17,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:01:17,967 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:01:17,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:01:17,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:01:17,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:01:17,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:01:17,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:01:17,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:01:17,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:01:17,969 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:01:17,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:01:17,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:01:17,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:01:17,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:01:17,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:01:17,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:01:17,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:01:17,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:01:17,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:01:17,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:01:17,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:01:17,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:01:17,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:01:18,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:01:18,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:01:18,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:01:18,455 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:01:18,456 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:01:18,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation2.c.v+cfa-reducer.c [2021-01-06 16:01:18,544 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a924d738e/f6aa0862f2f04f6994c397cf03dbfc7c/FLAG91cbc1ba5 [2021-01-06 16:01:19,251 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:01:19,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation2.c.v+cfa-reducer.c [2021-01-06 16:01:19,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a924d738e/f6aa0862f2f04f6994c397cf03dbfc7c/FLAG91cbc1ba5 [2021-01-06 16:01:19,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a924d738e/f6aa0862f2f04f6994c397cf03dbfc7c [2021-01-06 16:01:19,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:01:19,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:01:19,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:19,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:01:19,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:01:19,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:19,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e0ff3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19, skipping insertion in model container [2021-01-06 16:01:19,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:19,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:01:19,659 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~main__t~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__z~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2021-01-06 16:01:19,835 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.v+cfa-reducer.c[1463,1476] left hand side expression in assignment: lhs: VariableLHS[~__return_129~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] [2021-01-06 16:01:19,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:19,852 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~main__t~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__z~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2021-01-06 16:01:19,896 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.v+cfa-reducer.c[1463,1476] left hand side expression in assignment: lhs: VariableLHS[~__return_129~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] [2021-01-06 16:01:19,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:19,939 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:01:19,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19 WrapperNode [2021-01-06 16:01:19,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:19,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:19,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:01:19,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:01:19,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:19,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:20,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:20,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:01:20,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:01:20,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:01:20,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:20,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:20,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:20,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:20,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:20,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:20,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (1/1) ... [2021-01-06 16:01:20,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:01:20,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:01:20,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:01:20,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:01:20,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (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 16:01:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:01:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:01:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-01-06 16:01:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:01:20,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:01:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-01-06 16:01:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:01:20,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:01:20,635 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 16:01:20,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:20 BoogieIcfgContainer [2021-01-06 16:01:20,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:01:20,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:01:20,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:01:20,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:01:20,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:01:19" (1/3) ... [2021-01-06 16:01:20,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15542679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:20, skipping insertion in model container [2021-01-06 16:01:20,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:19" (2/3) ... [2021-01-06 16:01:20,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15542679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:20, skipping insertion in model container [2021-01-06 16:01:20,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:20" (3/3) ... [2021-01-06 16:01:20,648 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation2.c.v+cfa-reducer.c [2021-01-06 16:01:20,657 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:01:20,672 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:01:20,708 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:01:20,754 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:01:20,754 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:01:20,754 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:01:20,755 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:01:20,755 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:01:20,755 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:01:20,755 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:01:20,756 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:01:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 16:01:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:01:20,782 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:20,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:20,783 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:20,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1718991182, now seen corresponding path program 1 times [2021-01-06 16:01:20,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:20,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692183396] [2021-01-06 16:01:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:21,135 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 16:01:21,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692183396] [2021-01-06 16:01:21,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:21,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:01:21,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143704942] [2021-01-06 16:01:21,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:01:21,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:21,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:01:21,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:01:21,161 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2021-01-06 16:01:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:21,268 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-01-06 16:01:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:01:21,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 16:01:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:21,280 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:01:21,281 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:01:21,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:01:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:01:21,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 16:01:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:01:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-01-06 16:01:21,323 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-01-06 16:01:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:21,323 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-01-06 16:01:21,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:01:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-01-06 16:01:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:01:21,324 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:21,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:21,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:01:21,325 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1736001843, now seen corresponding path program 1 times [2021-01-06 16:01:21,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:21,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016017245] [2021-01-06 16:01:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:21,421 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 16:01:21,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016017245] [2021-01-06 16:01:21,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:21,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:01:21,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456590811] [2021-01-06 16:01:21,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:01:21,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:21,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:01:21,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:01:21,429 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2021-01-06 16:01:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:21,470 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-01-06 16:01:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:01:21,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-01-06 16:01:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:21,474 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:01:21,474 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:01:21,476 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 16:01:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:01:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-01-06 16:01:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:01:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 16:01:21,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2021-01-06 16:01:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:21,491 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 16:01:21,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:01:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 16:01:21,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:01:21,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:21,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:21,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:01:21,497 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:21,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash -842300589, now seen corresponding path program 1 times [2021-01-06 16:01:21,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:21,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619567500] [2021-01-06 16:01:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:21,549 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:21,578 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:21,631 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:01:21,631 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:01:21,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:01:21,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:01:21 BoogieIcfgContainer [2021-01-06 16:01:21,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:01:21,691 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:01:21,692 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:01:21,692 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:01:21,692 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:20" (3/4) ... [2021-01-06 16:01:21,696 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:01:21,697 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:01:21,699 INFO L168 Benchmark]: Toolchain (without parser) took 2089.58 ms. Allocated memory is still 161.5 MB. Free memory was 136.2 MB in the beginning and 99.5 MB in the end (delta: 36.8 MB). Peak memory consumption was 35.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:21,700 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 161.5 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:21,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.88 ms. Allocated memory is still 161.5 MB. Free memory was 136.1 MB in the beginning and 125.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:21,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.80 ms. Allocated memory is still 161.5 MB. Free memory was 125.2 MB in the beginning and 123.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:21,702 INFO L168 Benchmark]: Boogie Preprocessor took 33.11 ms. Allocated memory is still 161.5 MB. Free memory was 123.4 MB in the beginning and 121.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:21,703 INFO L168 Benchmark]: RCFGBuilder took 586.98 ms. Allocated memory is still 161.5 MB. Free memory was 121.9 MB in the beginning and 137.7 MB in the end (delta: -15.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:21,704 INFO L168 Benchmark]: TraceAbstraction took 1051.33 ms. Allocated memory is still 161.5 MB. Free memory was 137.7 MB in the beginning and 100.0 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:21,705 INFO L168 Benchmark]: Witness Printer took 5.18 ms. Allocated memory is still 161.5 MB. Free memory was 100.0 MB in the beginning and 99.5 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:21,709 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 161.5 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 326.88 ms. Allocated memory is still 161.5 MB. Free memory was 136.1 MB in the beginning and 125.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 73.80 ms. Allocated memory is still 161.5 MB. Free memory was 125.2 MB in the beginning and 123.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.11 ms. Allocated memory is still 161.5 MB. Free memory was 123.4 MB in the beginning and 121.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 586.98 ms. Allocated memory is still 161.5 MB. Free memory was 121.9 MB in the beginning and 137.7 MB in the end (delta: -15.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1051.33 ms. Allocated memory is still 161.5 MB. Free memory was 137.7 MB in the beginning and 100.0 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 8.0 GB. * Witness Printer took 5.18 ms. Allocated memory is still 161.5 MB. Free memory was 100.0 MB in the beginning and 99.5 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 53]: 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 35, overapproximation of someBinaryDOUBLEComparisonOperation at line 40, overapproximation of to_real at line 18, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L1] int __return_main; [L12] int __return_129; VAL [__return_129=0, __return_main=0] [L15] int main__i; [L16] float main__z; [L17] float main__t; [L18] float main__min[5] = { 5, 10, 12, 30, 150 }; [L19] float main__max[5] = { 10, 12, 30, 150, 300 }; [L20] float main__org[5] = { 1, 5, -10, 30, 20 }; [L21] float main__slope[5] = { 4, -15, 40, -10, 0 }; [L22] main__t = __VERIFIER_nondet_float() [L23] int main____CPAchecker_TMP_0; [L24] EXPR main__min[0] VAL [__return_129=0, __return_main=0] [L24] COND TRUE main__t >= (main__min[0]) [L26] EXPR main__max[4UL] VAL [__return_129=0, __return_main=0] [L26] COND TRUE main__t <= (main__max[4UL]) [L28] main____CPAchecker_TMP_0 = 1 VAL [__return_129=0, __return_main=0] [L29] COND TRUE main____CPAchecker_TMP_0 != 0 [L31] main__i = 0 VAL [__return_129=0, __return_main=0] [L33] COND TRUE main__i < 5UL [L35] EXPR main__max[main__i] VAL [__return_129=0, __return_main=0] [L35] COND TRUE main__t <= (main__max[main__i]) [L38] EXPR main__org[main__i] [L38] EXPR main__slope[main__i] [L38] EXPR main__min[main__i] [L38] EXPR main__max[main__i] [L38] EXPR main__min[main__i] [L38] main__z = (main__org[main__i]) + (((main__slope[main__i]) * (main__t - (main__min[main__i]))) / ((main__max[main__i]) - (main__min[main__i]))) [L39] int main____CPAchecker_TMP_1; VAL [__return_129=0, __return_main=0] [L40] COND FALSE !(main__z >= -10.0) VAL [__return_129=0, __return_main=0] [L66] main____CPAchecker_TMP_1 = 0 VAL [__return_129=0, __return_main=0] [L47] int __tmp_1; [L48] __tmp_1 = main____CPAchecker_TMP_1 [L49] int __VERIFIER_assert__cond; [L50] __VERIFIER_assert__cond = __tmp_1 VAL [__return_129=0, __return_main=0] [L51] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_129=0, __return_main=0] [L53] reach_error() VAL [__return_129=0, __return_main=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 40 SDslu, 55 SDs, 0 SdLazy, 19 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 352 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...