/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/filter2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:01:01,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:01:01,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:01:01,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:01:01,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:01:01,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:01:01,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:01:01,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:01:01,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:01:01,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:01:01,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:01:01,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:01:01,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:01:01,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:01:01,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:01:01,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:01:01,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:01:01,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:01:01,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:01:01,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:01:01,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:01:01,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:01:01,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:01:01,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:01:01,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:01:01,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:01:01,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:01:01,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:01:01,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:01:01,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:01:01,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:01:01,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:01:01,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:01:01,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:01:01,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:01:01,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:01:01,289 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 16:01:01,315 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:01:01,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:01:01,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:01:01,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:01:01,318 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:01:01,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:01:01,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:01:01,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:01:01,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:01:01,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:01:01,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:01:01,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:01:01,320 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:01:01,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:01:01,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:01:01,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:01:01,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:01:01,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:01:01,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:01:01,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:01:01,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:01:01,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:01:01,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:01:01,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:01:01,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:01:01,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:01:01,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:01:01,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:01:01,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:01:01,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:01:01,727 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:01:01,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter2.c [2021-01-06 16:01:01,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7afda9c6d/f6348a687922429d8347c5d10a06fa0e/FLAG01cda9f67 [2021-01-06 16:01:02,392 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:01:02,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/filter2.c [2021-01-06 16:01:02,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7afda9c6d/f6348a687922429d8347c5d10a06fa0e/FLAG01cda9f67 [2021-01-06 16:01:02,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7afda9c6d/f6348a687922429d8347c5d10a06fa0e [2021-01-06 16:01:02,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:01:02,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:01:02,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:02,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:01:02,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:01:02,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:02" (1/1) ... [2021-01-06 16:01:02,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672880c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:02, skipping insertion in model container [2021-01-06 16:01:02,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:01:02" (1/1) ... [2021-01-06 16:01:02,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:01:02,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:01:02,945 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/filter2.c[652,665] left hand side expression in assignment: lhs: VariableLHS[~E~0,] left hand side expression in assignment: lhs: VariableLHS[~E0~0,] left hand side expression in assignment: lhs: VariableLHS[~S0~0,] left hand side expression in assignment: lhs: VariableLHS[~S~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~E1~0,] left hand side expression in assignment: lhs: VariableLHS[~E0~0,] left hand side expression in assignment: lhs: VariableLHS[~E~0,] left hand side expression in assignment: lhs: VariableLHS[~S1~0,] left hand side expression in assignment: lhs: VariableLHS[~S0~0,] left hand side expression in assignment: lhs: VariableLHS[~S~0,] [2021-01-06 16:01:02,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:02,980 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:01:02,995 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/filter2.c[652,665] left hand side expression in assignment: lhs: VariableLHS[~E~0,] left hand side expression in assignment: lhs: VariableLHS[~E0~0,] left hand side expression in assignment: lhs: VariableLHS[~S0~0,] left hand side expression in assignment: lhs: VariableLHS[~S~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~E1~0,] left hand side expression in assignment: lhs: VariableLHS[~E0~0,] left hand side expression in assignment: lhs: VariableLHS[~E~0,] left hand side expression in assignment: lhs: VariableLHS[~S1~0,] left hand side expression in assignment: lhs: VariableLHS[~S0~0,] left hand side expression in assignment: lhs: VariableLHS[~S~0,] [2021-01-06 16:01:03,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:01:03,019 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:01:03,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03 WrapperNode [2021-01-06 16:01:03,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:01:03,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:03,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:01:03,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:01:03,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (1/1) ... [2021-01-06 16:01:03,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (1/1) ... [2021-01-06 16:01:03,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:01:03,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:01:03,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:01:03,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:01:03,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (1/1) ... [2021-01-06 16:01:03,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (1/1) ... [2021-01-06 16:01:03,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (1/1) ... [2021-01-06 16:01:03,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (1/1) ... [2021-01-06 16:01:03,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (1/1) ... [2021-01-06 16:01:03,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (1/1) ... [2021-01-06 16:01:03,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (1/1) ... [2021-01-06 16:01:03,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:01:03,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:01:03,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:01:03,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:01:03,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (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 16:01:03,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:01:03,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:01:03,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:01:03,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:01:03,634 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:01:03,635 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 16:01:03,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:03 BoogieIcfgContainer [2021-01-06 16:01:03,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:01:03,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:01:03,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:01:03,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:01:03,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:01:02" (1/3) ... [2021-01-06 16:01:03,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136547ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:03, skipping insertion in model container [2021-01-06 16:01:03,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:01:03" (2/3) ... [2021-01-06 16:01:03,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136547ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:01:03, skipping insertion in model container [2021-01-06 16:01:03,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:03" (3/3) ... [2021-01-06 16:01:03,665 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2.c [2021-01-06 16:01:03,682 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:01:03,694 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:01:03,725 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:01:03,770 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:01:03,770 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:01:03,770 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:01:03,770 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:01:03,772 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:01:03,774 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:01:03,774 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:01:03,774 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:01:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 16:01:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:01:03,802 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:03,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:03,803 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:03,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash 335317555, now seen corresponding path program 1 times [2021-01-06 16:01:03,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:03,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411040862] [2021-01-06 16:01:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:04,048 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 16:01:04,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411040862] [2021-01-06 16:01:04,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:01:04,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:01:04,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776203064] [2021-01-06 16:01:04,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:01:04,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:04,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:01:04,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:01:04,082 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 16:01:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:04,103 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-01-06 16:01:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:01:04,105 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 16:01:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:04,129 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:01:04,129 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:01:04,135 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 16:01:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:01:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:01:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:01:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-01-06 16:01:04,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-01-06 16:01:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:04,175 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-01-06 16:01:04,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:01:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-01-06 16:01:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:01:04,177 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:04,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:04,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:01:04,178 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1504524427, now seen corresponding path program 1 times [2021-01-06 16:01:04,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:04,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69150855] [2021-01-06 16:01:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:04,261 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:01:04,310 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:01:04,342 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:01:04,342 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:01:04,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:01:04,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:01:04 BoogieIcfgContainer [2021-01-06 16:01:04,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:01:04,373 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:01:04,373 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:01:04,373 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:01:04,374 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:01:03" (3/4) ... [2021-01-06 16:01:04,377 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 16:01:04,378 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:01:04,380 INFO L168 Benchmark]: Toolchain (without parser) took 1620.51 ms. Allocated memory is still 156.2 MB. Free memory was 131.0 MB in the beginning and 83.2 MB in the end (delta: 47.8 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:04,381 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory is still 129.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:01:04,382 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.87 ms. Allocated memory is still 156.2 MB. Free memory was 131.0 MB in the beginning and 120.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:04,384 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.64 ms. Allocated memory is still 156.2 MB. Free memory was 120.9 MB in the beginning and 119.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:04,385 INFO L168 Benchmark]: Boogie Preprocessor took 27.24 ms. Allocated memory is still 156.2 MB. Free memory was 119.4 MB in the beginning and 118.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:04,386 INFO L168 Benchmark]: RCFGBuilder took 549.33 ms. Allocated memory is still 156.2 MB. Free memory was 118.3 MB in the beginning and 105.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:04,387 INFO L168 Benchmark]: TraceAbstraction took 725.79 ms. Allocated memory is still 156.2 MB. Free memory was 104.8 MB in the beginning and 83.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:04,388 INFO L168 Benchmark]: Witness Printer took 5.24 ms. Allocated memory is still 156.2 MB. Free memory was 83.6 MB in the beginning and 83.2 MB in the end (delta: 441.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:01:04,394 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory is still 129.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.87 ms. Allocated memory is still 156.2 MB. Free memory was 131.0 MB in the beginning and 120.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.64 ms. Allocated memory is still 156.2 MB. Free memory was 120.9 MB in the beginning and 119.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.24 ms. Allocated memory is still 156.2 MB. Free memory was 119.4 MB in the beginning and 118.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 549.33 ms. Allocated memory is still 156.2 MB. Free memory was 118.3 MB in the beginning and 105.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 725.79 ms. Allocated memory is still 156.2 MB. Free memory was 104.8 MB in the beginning and 83.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Witness Printer took 5.24 ms. Allocated memory is still 156.2 MB. Free memory was 83.6 MB in the beginning and 83.2 MB in the end (delta: 441.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 44, overapproximation of to_real at line 30, overapproximation of someBinaryArithmeticDOUBLEoperation at line 42. Possible FailurePath: [L22] double E, E0, E1, S0, S1, S; [L23] int i; [L25] E = __VERIFIER_nondet_double() [L26] E0 = __VERIFIER_nondet_double() [L15] COND FALSE !(!cond) [L15] COND FALSE !(!cond) [L30] S0 = 0 [L31] S = 0 [L33] i = 0 [L33] COND TRUE i <= 1000000 [L34] E1 = E0 [L35] E0 = E [L37] E = __VERIFIER_nondet_double() [L15] COND FALSE !(!cond) [L40] S1 = S0 [L41] S0 = S [L42] S = 0.7*E - E0*1.3 + E1*1.1 + S0*1.4 - S1*0.7 [L17] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...