/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/interpolation.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:01:13,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:01:13,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:01:13,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:01:13,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:01:13,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:01:13,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:01:13,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:01:13,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:01:13,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:01:13,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:01:13,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:01:13,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:01:13,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:01:13,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:01:13,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:01:13,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:01:13,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:01:13,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:01:13,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:01:13,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:01:13,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:01:13,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:01:13,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:01:13,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:01:13,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:01:13,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:01:13,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:01:13,252 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 16:01:13,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:01:13,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:01:13,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:01:13,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:01:13,307 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:01:13,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:01:13,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:01:13,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:01:13,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:01:13,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:01:13,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:01:13,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:01:13,310 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:01:13,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:01:13,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:01:13,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:01:13,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:01:13,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:01:13,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:01:13,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:01:13,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:01:13,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:01:13,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:01:13,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:01:13,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:01:13,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:01:13,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:01:13,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:01:13,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:01:13,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:01:13,738 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:01:13,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c [2021-01-06 16:01:13,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/13ba8d218/21e5c4556a2b4afb8bb21592ca487f58/FLAGe7e47cc8b [2021-01-06 16:01:14,434 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:01:14,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation.c.p+cfa-reducer.c [2021-01-06 16:01:14,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/13ba8d218/21e5c4556a2b4afb8bb21592ca487f58/FLAGe7e47cc8b [2021-01-06 16:01:14,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/13ba8d218/21e5c4556a2b4afb8bb21592ca487f58 [2021-01-06 16:01:14,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:01:14,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:01:14,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:14,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:01:14,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:01:14,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:14" (1/1) ... [2021-01-06 16:01:14,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@211f3c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:14, skipping insertion in model container [2021-01-06 16:01:14,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:14" (1/1) ... [2021-01-06 16:01:14,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:01:14,883 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 16:01:15,053 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/interpolation.c.p+cfa-reducer.c[1306,1319] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] [2021-01-06 16:01:15,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:15,069 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 16:01:15,094 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/interpolation.c.p+cfa-reducer.c[1306,1319] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] [2021-01-06 16:01:15,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:15,113 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:01:15,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15 WrapperNode [2021-01-06 16:01:15,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:15,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:15,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:01:15,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:01:15,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (1/1) ... [2021-01-06 16:01:15,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (1/1) ... [2021-01-06 16:01:15,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:15,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:01:15,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:01:15,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:01:15,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (1/1) ... [2021-01-06 16:01:15,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (1/1) ... [2021-01-06 16:01:15,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (1/1) ... [2021-01-06 16:01:15,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (1/1) ... [2021-01-06 16:01:15,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (1/1) ... [2021-01-06 16:01:15,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (1/1) ... [2021-01-06 16:01:15,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (1/1) ... [2021-01-06 16:01:15,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:01:15,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:01:15,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:01:15,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:01:15,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (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 16:01:15,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:01:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:01:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-01-06 16:01:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:01:15,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:01:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-01-06 16:01:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:01:15,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:01:15,569 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 16:01:15,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:15 BoogieIcfgContainer [2021-01-06 16:01:15,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:01:15,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:01:15,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:01:15,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:01:15,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:01:14" (1/3) ... [2021-01-06 16:01:15,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285c94af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:15, skipping insertion in model container [2021-01-06 16:01:15,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:15" (2/3) ... [2021-01-06 16:01:15,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285c94af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:15, skipping insertion in model container [2021-01-06 16:01:15,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:15" (3/3) ... [2021-01-06 16:01:15,591 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c.p+cfa-reducer.c [2021-01-06 16:01:15,613 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:01:15,626 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:01:15,689 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:01:15,728 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:01:15,729 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:01:15,729 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:01:15,729 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:01:15,729 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:01:15,729 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:01:15,730 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:01:15,730 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:01:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-01-06 16:01:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:01:15,754 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:15,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:15,756 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:15,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:15,764 INFO L82 PathProgramCache]: Analyzing trace with hash 83921358, now seen corresponding path program 1 times [2021-01-06 16:01:15,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:15,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089681291] [2021-01-06 16:01:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:16,036 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 16:01:16,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089681291] [2021-01-06 16:01:16,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:16,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:01:16,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181712528] [2021-01-06 16:01:16,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:01:16,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:01:16,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:01:16,080 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2021-01-06 16:01:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:16,247 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-01-06 16:01:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:01:16,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 16:01:16,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:16,301 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:01:16,302 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:01:16,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:01:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:01:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2021-01-06 16:01:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:01:16,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 16:01:16,371 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 12 [2021-01-06 16:01:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:16,372 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 16:01:16,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:01:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 16:01:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:01:16,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:16,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:16,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:01:16,375 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:16,380 INFO L82 PathProgramCache]: Analyzing trace with hash 100932019, now seen corresponding path program 1 times [2021-01-06 16:01:16,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:16,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979713528] [2021-01-06 16:01:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:16,507 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 16:01:16,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979713528] [2021-01-06 16:01:16,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:16,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:01:16,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001745614] [2021-01-06 16:01:16,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:01:16,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:16,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:01:16,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:01:16,516 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2021-01-06 16:01:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:16,544 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-01-06 16:01:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:01:16,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-01-06 16:01:16,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:16,549 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:01:16,549 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:01:16,553 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 16:01:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:01:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2021-01-06 16:01:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:01:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 16:01:16,559 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2021-01-06 16:01:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:16,560 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 16:01:16,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:01:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 16:01:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:01:16,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:16,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:16,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:01:16,562 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:16,562 INFO L82 PathProgramCache]: Analyzing trace with hash 10142420, now seen corresponding path program 1 times [2021-01-06 16:01:16,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:16,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401079184] [2021-01-06 16:01:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:16,586 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:16,606 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:16,634 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:01:16,634 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:01:16,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:01:16,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:01:16 BoogieIcfgContainer [2021-01-06 16:01:16,675 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:01:16,675 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:01:16,676 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:01:16,676 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:01:16,677 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:15" (3/4) ... [2021-01-06 16:01:16,680 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:01:16,681 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:01:16,683 INFO L168 Benchmark]: Toolchain (without parser) took 1842.43 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 118.6 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:16,684 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:16,685 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.78 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:16,686 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.38 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:16,687 INFO L168 Benchmark]: Boogie Preprocessor took 37.61 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:16,688 INFO L168 Benchmark]: RCFGBuilder took 379.85 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 98.0 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:16,689 INFO L168 Benchmark]: TraceAbstraction took 1101.04 ms. Allocated memory is still 151.0 MB. Free memory was 97.7 MB in the beginning and 119.1 MB in the end (delta: -21.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:16,689 INFO L168 Benchmark]: Witness Printer took 5.38 ms. Allocated memory is still 151.0 MB. Free memory was 119.1 MB in the beginning and 118.6 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:16,694 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 151.0 MB. Free memory is still 124.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.78 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.2 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 37.38 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.61 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 379.85 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 98.0 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1101.04 ms. Allocated memory is still 151.0 MB. Free memory was 97.7 MB in the beginning and 119.1 MB in the end (delta: -21.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 5.38 ms. Allocated memory is still 151.0 MB. Free memory was 119.1 MB in the beginning and 118.6 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: 51]: 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 33, overapproximation of someBinaryDOUBLEComparisonOperation at line 38, overapproximation of to_real at line 17, overapproximation of someBinaryArithmeticFLOAToperation at line 36. Possible FailurePath: [L1] int __return_main; VAL [__return_main=0] [L14] int main__i; [L15] float main__z; [L16] float main__t; [L17] float main__min[5] = { 5, 10, 12, 30, 150 }; [L18] float main__max[5] = { 10, 12, 30, 150, 300 }; [L19] main__t = __VERIFIER_nondet_float() [L20] int main____CPAchecker_TMP_0; [L21] EXPR main__min[0] VAL [__return_main=0] [L21] COND TRUE main__t >= (main__min[0]) [L23] EXPR main__max[4UL] VAL [__return_main=0] [L23] COND TRUE main__t <= (main__max[4UL]) [L25] main____CPAchecker_TMP_0 = 1 VAL [__return_main=0] [L27] COND TRUE main____CPAchecker_TMP_0 != 0 [L29] main__i = 0 VAL [__return_main=0] [L31] COND TRUE main__i < 5UL [L33] EXPR main__max[main__i] VAL [__return_main=0] [L33] COND TRUE main__t <= (main__max[main__i]) [L36] EXPR main__min[main__i] [L36] EXPR main__max[main__i] [L36] EXPR main__min[main__i] [L36] main__z = (main__t - (main__min[main__i])) / ((main__max[main__i]) - (main__min[main__i])) [L37] int main____CPAchecker_TMP_1; VAL [__return_main=0] [L38] COND FALSE !(main__z >= 0.0) VAL [__return_main=0] [L63] main____CPAchecker_TMP_1 = 0 VAL [__return_main=0] [L45] int __tmp_1; [L46] __tmp_1 = main____CPAchecker_TMP_1 [L47] int __VERIFIER_assert__cond; [L48] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0] [L49] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0] [L51] reach_error() VAL [__return_main=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 49 SDslu, 76 SDs, 0 SdLazy, 24 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 20 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s 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...