/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/float-benchs/inv_Newton.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:58:57,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:58:57,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:58:57,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:58:57,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:58:57,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:58:57,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:58:57,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:58:57,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:58:57,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:58:57,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:58:57,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:58:57,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:58:57,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:58:57,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:58:57,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:58:57,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:58:57,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:58:57,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:58:57,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:58:57,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:58:57,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:58:57,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:58:57,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:58:57,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:58:57,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:58:57,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:58:57,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:58:57,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:58:57,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:58:57,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:58:57,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:58:57,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:58:57,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:58:57,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:58:57,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:58:57,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:58:57,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:58:57,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:58:57,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:58:57,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:58:57,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:58:57,570 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:58:57,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:58:57,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:58:57,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:58:57,576 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:58:57,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:58:57,576 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:58:57,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:58:57,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:58:57,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:58:57,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:58:57,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:58:57,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:58:57,579 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:58:57,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:58:57,579 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:58:57,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:58:57,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:58:57,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:58:57,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:58:57,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:58:57,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:58:57,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:58:57,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:58:57,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:58:57,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:58:57,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:58:57,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:58:57,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:58:57,583 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:58:57,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:58:57,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:58:58,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:58:58,002 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:58:58,003 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:58:58,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_Newton.c.p+cfa-reducer.c [2020-10-27 00:58:58,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/778d259f0/b778c4e5d04f460db58d7009f2ca3022/FLAG437ca6596 [2020-10-27 00:58:58,647 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:58:58,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/inv_Newton.c.p+cfa-reducer.c [2020-10-27 00:58:58,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/778d259f0/b778c4e5d04f460db58d7009f2ca3022/FLAG437ca6596 [2020-10-27 00:58:59,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/778d259f0/b778c4e5d04f460db58d7009f2ca3022 [2020-10-27 00:58:59,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:58:59,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:58:59,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:58:59,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:58:59,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:58:59,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:58:59" (1/1) ... [2020-10-27 00:58:59,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a1cb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59, skipping insertion in model container [2020-10-27 00:58:59,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:58:59" (1/1) ... [2020-10-27 00:58:59,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:58:59,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:58:59,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:58:59,317 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:58:59,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:58:59,364 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:58:59,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59 WrapperNode [2020-10-27 00:58:59,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:58:59,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:58:59,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:58:59,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:58:59,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59" (1/1) ... [2020-10-27 00:58:59,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59" (1/1) ... [2020-10-27 00:58:59,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59" (1/1) ... [2020-10-27 00:58:59,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59" (1/1) ... [2020-10-27 00:58:59,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59" (1/1) ... [2020-10-27 00:58:59,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59" (1/1) ... [2020-10-27 00:58:59,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59" (1/1) ... [2020-10-27 00:58:59,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:58:59,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:58:59,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:58:59,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:58:59,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:58:59,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:58:59,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:58:59,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:58:59,519 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 00:58:59,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:58:59,520 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:58:59,520 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:58:59,520 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:58:59,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:58:59,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-27 00:58:59,522 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 00:58:59,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 00:58:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure inv [2020-10-27 00:58:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:58:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-27 00:58:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:58:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:58:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-27 00:58:59,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:58:59,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:58:59,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:58:59,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:59:00,162 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:59:00,162 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 00:59:00,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:59:00 BoogieIcfgContainer [2020-10-27 00:59:00,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:59:00,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:59:00,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:59:00,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:59:00,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:58:59" (1/3) ... [2020-10-27 00:59:00,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c9cfe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:59:00, skipping insertion in model container [2020-10-27 00:59:00,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:58:59" (2/3) ... [2020-10-27 00:59:00,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c9cfe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:59:00, skipping insertion in model container [2020-10-27 00:59:00,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:59:00" (3/3) ... [2020-10-27 00:59:00,179 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_Newton.c.p+cfa-reducer.c [2020-10-27 00:59:00,195 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:59:00,201 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:59:00,215 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:59:00,253 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:59:00,253 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:59:00,253 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:59:00,253 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:59:00,253 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:59:00,254 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:59:00,254 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:59:00,254 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:59:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-27 00:59:00,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 00:59:00,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:00,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:00,288 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1303324310, now seen corresponding path program 1 times [2020-10-27 00:59:00,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:00,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797062515] [2020-10-27 00:59:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:00,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:00,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:00,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:00,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:00,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 00:59:00,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:59:00,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-27 00:59:00,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:00,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:59:00,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 00:59:00,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:59:00,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:59:01,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:01,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:01,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:01,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:01,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:01,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:59:01,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:01,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:01,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:01,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797062515] [2020-10-27 00:59:01,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:59:01,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:59:01,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685850596] [2020-10-27 00:59:01,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:59:01,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:59:01,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:59:01,169 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-10-27 00:59:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:01,356 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-10-27 00:59:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 00:59:01,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 00:59:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:01,367 INFO L225 Difference]: With dead ends: 50 [2020-10-27 00:59:01,367 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 00:59:01,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:59:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 00:59:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 00:59:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 00:59:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-27 00:59:01,413 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2020-10-27 00:59:01,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:01,414 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-27 00:59:01,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:59:01,414 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-27 00:59:01,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 00:59:01,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:01,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:01,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:59:01,416 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1380425167, now seen corresponding path program 1 times [2020-10-27 00:59:01,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:01,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601871349] [2020-10-27 00:59:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:01,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:01,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:01,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:01,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 00:59:01,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:59:01,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-27 00:59:01,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:01,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:59:01,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 00:59:01,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:59:01,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:01,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:01,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:01,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:01,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:01,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:01,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 00:59:01,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:01,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:01,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:01,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:01,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:59:01,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601871349] [2020-10-27 00:59:01,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:59:01,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:59:01,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388535892] [2020-10-27 00:59:01,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:59:01,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:59:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:59:01,753 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2020-10-27 00:59:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:01,826 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-10-27 00:59:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 00:59:01,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 00:59:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:01,828 INFO L225 Difference]: With dead ends: 35 [2020-10-27 00:59:01,828 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 00:59:01,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:59:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 00:59:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-10-27 00:59:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 00:59:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-27 00:59:01,837 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2020-10-27 00:59:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:01,837 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-27 00:59:01,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:59:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-27 00:59:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 00:59:01,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:01,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:01,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:59:01,839 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:01,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:01,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1388859315, now seen corresponding path program 1 times [2020-10-27 00:59:01,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:01,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239392786] [2020-10-27 00:59:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:01,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:01,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:01,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 00:59:01,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:01,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 00:59:01,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 00:59:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 00:59:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 00:59:01,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:59:02,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:59:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:59:02,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:59:02,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:59:02,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:59:02,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:59:02,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 00:59:02,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:59:02,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:59:02,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:59:02,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:59:02,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:59:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:59:02,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239392786] [2020-10-27 00:59:02,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:59:02,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 00:59:02,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931054928] [2020-10-27 00:59:02,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:59:02,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:59:02,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:59:02,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:59:02,145 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-10-27 00:59:02,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:59:02,251 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-27 00:59:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:59:02,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-27 00:59:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:59:02,252 INFO L225 Difference]: With dead ends: 28 [2020-10-27 00:59:02,253 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 00:59:02,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:59:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 00:59:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 00:59:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 00:59:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-27 00:59:02,260 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 20 [2020-10-27 00:59:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:59:02,260 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-27 00:59:02,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:59:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-27 00:59:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 00:59:02,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:59:02,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:59:02,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:59:02,262 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:59:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:59:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash -920634168, now seen corresponding path program 1 times [2020-10-27 00:59:02,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:59:02,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148523505] [2020-10-27 00:59:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:59:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 00:59:02,279 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 00:59:02,280 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 00:59:02,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:59:02,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 12:59:02 BoogieIcfgContainer [2020-10-27 00:59:02,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 00:59:02,305 INFO L168 Benchmark]: Toolchain (without parser) took 3289.32 ms. Allocated memory is still 162.5 MB. Free memory was 137.9 MB in the beginning and 65.8 MB in the end (delta: 72.1 MB). Peak memory consumption was 73.3 MB. Max. memory is 8.0 GB. [2020-10-27 00:59:02,306 INFO L168 Benchmark]: CDTParser took 0.69 ms. Allocated memory is still 162.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 00:59:02,307 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.96 ms. Allocated memory is still 162.5 MB. Free memory was 137.2 MB in the beginning and 126.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 00:59:02,308 INFO L168 Benchmark]: Boogie Preprocessor took 62.46 ms. Allocated memory is still 162.5 MB. Free memory was 126.8 MB in the beginning and 125.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 00:59:02,309 INFO L168 Benchmark]: RCFGBuilder took 735.55 ms. Allocated memory is still 162.5 MB. Free memory was 125.1 MB in the beginning and 140.8 MB in the end (delta: -15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-27 00:59:02,309 INFO L168 Benchmark]: TraceAbstraction took 2133.01 ms. Allocated memory is still 162.5 MB. Free memory was 140.3 MB in the beginning and 65.8 MB in the end (delta: 74.6 MB). Peak memory consumption was 75.6 MB. Max. memory is 8.0 GB. [2020-10-27 00:59:02,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69 ms. Allocated memory is still 162.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 340.96 ms. Allocated memory is still 162.5 MB. Free memory was 137.2 MB in the beginning and 126.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.46 ms. Allocated memory is still 162.5 MB. Free memory was 126.8 MB in the beginning and 125.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 735.55 ms. Allocated memory is still 162.5 MB. Free memory was 125.1 MB in the beginning and 140.8 MB in the end (delta: -15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2133.01 ms. Allocated memory is still 162.5 MB. Free memory was 140.3 MB in the beginning and 65.8 MB in the end (delta: 74.6 MB). Peak memory consumption was 75.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseAnd at line 45, overapproximation of someBinaryArithmeticDOUBLEoperation at line 53, overapproximation of someBinaryDOUBLEComparisonOperation at line 83, overapproximation of to_real at line 46. Possible FailurePath: [L1] int __return_main; [L17] double __return_104; [L20] double main__a; [L21] double main__r; [L22] main__a = __VERIFIER_nondet_double() [L23] int main____CPAchecker_TMP_0; [L24] COND TRUE main__a >= 20.0 [L26] COND TRUE main__a <= 30.0 [L28] main____CPAchecker_TMP_0 = 1 [L30] COND TRUE main____CPAchecker_TMP_0 != 0 [L33] double __tmp_1; [L34] __tmp_1 = main__a [L35] double inv__A; [L36] inv__A = __tmp_1 [L37] double inv__xi; [L38] double inv__xsi; [L39] double inv__temp; [L40] signed int inv__cond; [L41] signed int inv__exp; [L42] union double_int inv__A_u; [L43] union double_int inv__xi_u; [L44] inv__A_u.d = inv__A [L45] EXPR inv__A_u.i [L45] inv__exp = ((signed int)(((inv__A_u.i) & 2146435072) >> 20)) - 1023 [L46] inv__xi_u.d = 1 [L47] inv__xi_u.i = (1023 - inv__exp) << 20 [L48] EXPR inv__xi_u.d [L48] inv__xi = inv__xi_u.d [L49] inv__cond = 1 [L51] COND TRUE !(inv__cond == 0) [L53] inv__xsi = (2 * inv__xi) - ((inv__A * inv__xi) * inv__xi) [L54] inv__temp = inv__xsi - inv__xi [L55] int inv____CPAchecker_TMP_0; [L56] COND FALSE !(inv__temp > 1.0E-10) [L67] COND FALSE !(inv__temp < -1.0E-10) [L73] inv____CPAchecker_TMP_0 = 0 [L61] inv__cond = inv____CPAchecker_TMP_0 [L62] inv__xi = inv__xsi [L51] COND FALSE !(!(inv__cond == 0)) [L80] __return_104 = inv__xi [L81] main__r = __return_104 [L82] int main____CPAchecker_TMP_1; [L83] COND FALSE !(main__r >= 0) [L108] main____CPAchecker_TMP_1 = 0 [L90] int __tmp_2; [L91] __tmp_2 = main____CPAchecker_TMP_1 [L92] int __VERIFIER_assert__cond; [L93] __VERIFIER_assert__cond = __tmp_2 [L94] COND TRUE __VERIFIER_assert__cond == 0 [L96] CALL reach_error() [L4] __assert_fail("0", "inv_Newton.c.p+cfa-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 27 SDslu, 82 SDs, 0 SdLazy, 96 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 49 ConstructedInterpolants, 0 QuantifiedInterpolants, 2711 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 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...